Relevant bibliographies by topics / Plasma-Based Accelerator

Academic literature on the topic 'Plasma-Based Accelerator'

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Published: 14 March 2023

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Journal articles on the topic "Plasma-Based Accelerator"

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Ogata, Atsushi, and Kazuhisa Nakajima. "Recent progress and perspectives of laser–plasma accelerators." Laser and Particle Beams 16, no. 2 (June 1998): 381–96. http://dx.doi.org/10.1017/s0263034600011654.

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Recent progress in laser-plasma accelerators has matured a concept of particle acceleration as a possible next-generation particle accelerator promising ultrahigh accelerating gradients in a compact size. Four major concepts of laser-plasma accelerators—the plasma beat wave accelerator, the laser wakefield accelerator, the self-modulated laser wakefield accelerator, and the plasma wakefield accelerator—are reviewed on accelerator physics issues and experiments demonstrating the basic mechanisms of their concepts. As a perspective to the future practical application, a design of 5-TeV linear colliders based on the laser wakefield accelerator is discussed.
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Polozov, Sergey M., and Vladimir I. Rashchikov. "Simulation studies of beam dynamics in 50 MeV linear accelerator with laser-plasma electron gun." Cybernetics and Physics, Volume 10, 2021, Number 4 (December 31, 2021): 260–70. http://dx.doi.org/10.35470/2226-4116-2021-10-4-260-270.

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Conventionally, electron guns with thermionic cathodes or field-emission cathodes are used for research or technological linear accelerators. RF-photoguns are used to provide the short electron bunches which could be used for FEL’s of compact research facilities to generate monochromatic photons. Low energy of emitted electrons is the key problem for photoguns due to high influence of Coulomb field and difficulties with the first accelerating cell simulation and construction. Contrary, plasma sources, based on the laser-plasma wakefield acceleration, have very high acceleration gradient but rather broad energy spectrum compared with conventional thermoguns or field-emission guns. The beam dynamics in the linear accelerator combines the laser-plasma electron source and conventional RF linear accelerator is discussed in this paper. Method to capture and re-accelerate the short picosecond bunch with extremely broad energy spread (up to 50 %) is presented. Numerical simulation shows that such bunches can be accelerated in RF linear accelerator to the energy of 50 MeV with output energy spread not higher than 1 % .
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Karimov, Alexander, Svyatoslav Terekhov, and Vladimir Yamschikov. "Pulsed Plasma Accelerator." Plasma 6, no. 1 (January 28, 2023): 36–44. http://dx.doi.org/10.3390/plasma6010004.

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In this paper, we consider the acceleration of plasma fluxes in crossed electromagnetic fields. The possible technical approach to a prospective plasma accelerator is discussed. A simple hydrodynamic model describing the dynamics of the plasma ring in these fields is proposed. Based on this model, the estimations of basic characteristics for the accelerated flux are calculated for typical experimental conditions.
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Galletti, Mario, Maria Pia Anania, Sahar Arjmand, Angelo Biagioni, Gemma Costa, Martina Del Giorno, Massimo Ferrario, et al. "Advanced Stabilization Methods of Plasma Devices for Plasma-Based Acceleration." Symmetry 14, no. 3 (February 24, 2022): 450. http://dx.doi.org/10.3390/sym14030450.

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Towards the next generation of compact plasma-based accelerators, useful in several fields, such as basic research, medicine and industrial applications, a great effort is required to control the plasma creation, the necessity of producing a time-jitter free channel, and its stability namely uniformity and reproducibility. In this Letter, we describe an experimental campaign adopting a gas-filled discharge-capillary where the plasma and its generation are stabilized by triggering its ignition with an external laser pulse or an innovative technique based on the primary dark current (DC) in the accelerating structure of a linear accelerator (LINAC). The results show an efficient stabilization of the discharge pulse and plasma density with both pre-ionizing methods turning the plasma device into a symmetrical stable accelerating environment, especially when the external voltage is lowered near the breakdown value of the gas. The development of tens of centimeter long capillaries is enabled and, in turn, longer acceleration lengths can be adopted in a wide range of plasma-based acceleration experiments.
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Malka, V., J. Faure, Y. Glinec, and A. F. Lifschitz. "Laser–plasma accelerator: status and perspectives." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364, no. 1840 (January 25, 2006): 601–10. http://dx.doi.org/10.1098/rsta.2005.1725.

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Laser–plasma accelerators deliver high-charge quasi-monoenergetic electron beams with properties of interest for many applications. Their angular divergence, limited to a few mrad, permits one to generate a small γ ray source for dense matter radiography, whereas their duration (few tens of fs) permits studies of major importance in the context of fast chemistry for example. In addition, injecting these electron beams into a longer plasma wave structure will extend their energy to the GeV range. A GeV laser-based accelerator scheme is presented; it consists of the acceleration of this electron beam into relativistic plasma waves driven by a laser. This compact approach (centimetres scale for the plasma, and tens of meters for the whole facility) will allow a miniaturization and cost reduction of future accelerators and derived X-ray free electron laser (XFEL) sources.
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Li, Dongyu, Tang Yang, Minjian Wu, Zhusong Mei, Kedong Wang, Chunyang Lu, Yanying Zhao, et al. "Introduction of Research Work on Laser Proton Acceleration and Its Application Carried out on Compact Laser–Plasma Accelerator at Peking University." Photonics 10, no. 2 (January 28, 2023): 132. http://dx.doi.org/10.3390/photonics10020132.

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Laser plasma acceleration has made remarkable progress in the last few decades, but it also faces many challenges. Although the high gradient is a great potential advantage, the beam quality of the laser accelerator has a certain gap, or it is different from that of traditional accelerators. Therefore, it is important to explore and utilize its own features. In this article, some recent research progress on laser proton acceleration and its irradiation application, which was carried out on the compact laser plasma accelerator (CLAPA) platform at Peking University, have been introduced. By combining a TW laser accelerator and a monoenergetic beamline, proton beams with energies of less than 10 MeV, an energy spread of less than 1%, and with several to tens of pC charge, have been stably produced and transported in CLAPA. The beamline is an object–image point analyzing system, which ensures the transmission efficiency and the energy selection accuracy for proton beams with large initial divergence angle and energy spread. A spread-out Bragg peak (SOBP) is produced with high precision beam control, which preliminarily proved the feasibility of the laser accelerator for radiotherapy. Some application experiments based on laser-accelerated proton beams have also been carried out, such as proton radiograph, preparation of graphene on SiC, ultra-high dose FLASH radiation of cancer cells, and ion-beam trace probes for plasma diagnosis. The above applications take advantage of the unique characteristics of laser-driven protons, such as a micron scale point source, an ultra-short pulse duration, a wide energy spectrum, etc. A new laser-driven proton therapy facility (CLAPA II) is being designed and is under construction at Peking University. The 100 MeV proton beams will be produced via laser–plasma interaction by using a 2-PW laser, which may promote the real-world applications of laser accelerators in malignant tumor treatment soon.
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Pogorelsky, I. V., M. Babzien, K. P. Kusche, I. V. Pavlishin, V. Yakimenko, C. E. Dilley, S. C. Gottschalk, et al. "Plasma-based advanced accelerators at the Brookhaven Accelerator Test Facility." Laser Physics 16, no. 2 (February 2006): 259–66. http://dx.doi.org/10.1134/s1054660x06020095.

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Yang, Lei, Xiang Yang Liu, Si Yu Wang, and Ning Fei Wang. "Theoretical and Numerical Analysis of Discharge Characteristics in Pulsed Electromagnetic Accelerators." Advanced Materials Research 765-767 (September 2013): 805–8. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.805.

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Discharge is critical physical process in pulsed electromagnetic accelerators for arc plasma jet device, and its characteristics directly determines the accelerator performance. The mechanisms of discharge plasma and flow in the accelerator are analyzed by magnetohydrodynamics (MHD). The model is coupled with electric circuit model based on weakly nonideal plasma conductivity and ablation model. Calculation results show that there is some nonideal plasma region which has important effects on electrical conductivity; most ablated gases are ionized at the half cycle of the discharge time and are accelerated by Lorentz force to high exhaust velocity; electrical conductivity, plasma temperature and density are increasing with discharge energy unleashed, and gradually reduce in the post-discharge.
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Pae, K. H., I. W. Choi, and J. Lee. "Self-mode-transition from laser wakefield accelerator to plasma wakefield accelerator of laser-driven plasma-based electron acceleration." Physics of Plasmas 17, no. 12 (December 2010): 123104. http://dx.doi.org/10.1063/1.3522757.

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Williams, R. L., C. E. Clayton, C. Joshi, T. Katsouleas, and W. B. Mori. "Studies of relativistic wave–particle interactions in plasma-based collective accelerators." Laser and Particle Beams 8, no. 3 (September 1990): 427–49. http://dx.doi.org/10.1017/s0263034600008673.

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The interaction of externally injected charged particles (electrons) with plasma waves moving with a phase velocity that is very close to the speed of light is examined. Such plasma waves form the basis of at least three collective accelerator schemes: the plasma beat wave accelerator (PBWA), the plasma wake-field accelerator (PWFA), and the laser wake-field accelerator (LWFA). First, the electron trapping threshold, energy gain and acceleration length are examined using a 1-D model. This model elucidates how the final energies of the injected test electrons depend upon their injection and extraction phases and phase slippage. Phase energy diagrams are shown to be extremely useful in visualizing wave-particle interactions in 1-D. Second, we examine, using a two-dimensional model, the effects of radial electric fields on focusing or defocusing the injected particles depending upon their radial positions and phases in the relativistically moving potential well. Finally, we extend the model to 3-D so that the effect of injected particles' emittance on the acceleration process may be determined. This simple 3-D model will be extremely useful in predicting the electron energy spectra of several current experiments designed to demonstrate ultrahigh gradient acceleration of externally injected test particles by relativistic plasma waves.
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Dissertations / Theses on the topic "Plasma-Based Accelerator"

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Cipiccia, Silvia. "Compact gamma-ray sources based on laser-plasma wakefield accelerator." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23936.

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Laser-plasma wakefield accelerator (LWFA) is a promising novel technology that is introducing miniaturization to the accelerator world: the unprecedented gradient of acceleration shrinks the accelerator down to table-top size. Moreover, the LWFA comes with an embedded light source: electrons, while accelerating, undergo betatron oscillatory motion that results in synchrotron radiation emitted in a narrow cone along the direction of propagation. In this thesis we study theoretically and we prove experimentally a new regime of betatron oscillation that occurs when electrons experience the electromagnetic field of the laser during acceleration and oscillate resonantly at the laser frequency or its sub-harmonics. The signature of the harmonically resonant betatron (HRB) regime is a large oscillation amplitude and consequently prolific emission of high energy photons up to the MeV range. The HRB source has unique properties: very short pulse length (~10 fs), small source size (few microns), high peak brightness of the order of 1023 photons/s mm2 mrad2 0.1% B.W., which is comparable with a third generation light source. These properties make the source particularly appealing for the life sciences and medical and security applications. As a part of a future applications project, we give the scaling of the photon energy as a function of laser intensity and plasma density, which could extend toward tens of MeV. The thesis also investigates another gamma-ray source that utilises beams from the LWFA: bremsstrahlung radiation from high energy electrons interacting with metal targets. We study the electron beam and target parameters to optimize the emission process and the gamma-ray beam properties to match potential application requirements, such as radioisotope generation via photonuclear process. The results of a proof of concept experiment are presented and compared with simulations. Finally, we investigate numerically the possibility of generating a converging gamma ray beam based on the bremsstrahlung process. The results are encouraging, and the potential impact of a compact converging gamma-ray beam source is discussed with particular attention to medical applications in cancer treatment.
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Hartwig, Zachary Seth. "An in-situ accelerator-based diagnostic for plasma-material interactions science in magnetic fusion devices." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87488.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 149-162).
Plasma-material interactions (PMI) in magnetic fusion devices such as fuel retention, material erosion and redeposition, and material mixing present significant scientific and engineering challenges, particularly for the next generation of devices that will move towards reactor-relevant conditions. Achieving an integrated understanding of PMI, however, is severely hindered by a dearth of in-situ diagnosis of the plasma-facing component (PFC) surfaces. To address this critical need, this thesis presents an accelerator-based diagnostic that nondestructively measures the evolution of PFC surfaces in-situ. The diagnostic aims to remotely generate isotopic concentration maps that cover a large fraction of the PFC surfaces on a plasma shot-to-shot timescale. The diagnostic uses a compact, high-current radio-frequency quadrupole accelerator to inject 0.9 MeV deuterons into the Alcator C-Mod tokamak. The tokamak magnetic fields in between plasma shots are used to steer the deuterons to PFCs where the deuterons cause high-Q nuclear reactions with low-Z isotopes ~5 [mu]m into the material. Scintillation detectors measure the induced neutrons and gammas; energy spectra analysis provides quantitative reconstruction of surface concentrations. An overview of the diagnostic technique, known as accelerator-based in-situ materials surveillance (AIMS), and the first AIMS diagnostic on the Alcator C-Mod is given; a description of the complementary simulation tools is also provided. Experimental validation is shown to demonstrate the optimized beam injection into the tokamak, the quantification of PFC surfaces isotopes, and the measurement localization provided by magnetic beam steering. Finally, the first AIMS measurements of fusion fuel retention are presented, demonstrating the local erosion and codeposition of deuterium-saturated boron surface films. The finding confirms that deuterium codeposition with boron is insufficient to account for the net fuel retention in Alcator C-Mod.
by Zachary Seth Hartwig.
Ph. D.
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Barnard, Harold Salvadore. "Development of accelerator based spatially resolved ion beam analysis techniques for the study of plasma materials interactions in magnetic fusion devices." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87495.

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Thesis: Sc. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 214-218).
Plasma-material interactions (PMI) in magnetic fusion devices pose significant scientific and engineering challenges for the development of steady-state fusion power reactors. Understanding PMI is crucial for the develpment of magnetic fusion devices because fusion plasmas can significantly modify plasma facing components (PFC) which can be severely detrimental to material longevity and plasma impurity control. In addition, the retention of tritium (T) fuel in PFCs or plasma co-deposited material can disrupt the fuel cycle of the reactor while contributing to radiological and regulatory issues. The current state of the art for PMI research involves using accelerator based ion beam analysis (IBA) techniques in order to provide quantitative measurement of the modification to plasma-facing surfaces. Accelerated ~MeV ion beams are used to induce nuclear reactions or scattering, and by spectroscopic analysis of the resulting high energy particles (s', p, n, a, etc.), the material composition can be determined. PFCs can be analyzed to observe erosion and deposition patterns along their surfaces which can be measured with spatial resolution down to the -1 mm scale on depth scales of 10 - 100 pim. These techniques however are inherently ex-situ and can only be performed on PFCs that have been removed from tokamaks, thus limiting analysis to the cumulative PMI effects of months or years of plasma experiments. While ex-situ analysis is a powerful tool for studying the net effects of PMI, ex-situ analysis cannot address the fundamental challenge of correlating the plasma conditions of each experiment to the material surface evolution. This therefore motivates the development of the in-situ diagnostics to study surfaces with comparable diagnostic quality to IBA in order resolve the time evolution of these surface conditions. To address this fundamental diagnostic need, the Accelerator-Based In-Situ Materials Surveillance (AIMS) diagnostic [22] was developed to, for the first time, provide in-situ, spatially resolved IBA measurements inside of the Alcator C-Mod tokamak. The work presented in this thesis provided major technical and scientific contributions to the development and first demonstration AIMS. This included accelerator development, advanced simulation methods, and in-situ measurement of PFC surface properties and their evolution. The AIMS diagnostic was successfully implemented on Alcator C-Mod yielding the first spatially resolved and quantitative in-situ measurements of surface properties in a tokamak, with thin boron films on molybdenum PFCs being the analyzed surface in C-Mod. By combining AIMS neutron and gamma measurements, time resolved and spatially resolved measurements of boron were made, spanning the entire AIMS run campaign which included lower single null plasma discharges, inboard limited plasma discharges, a disruption, and C-Mod wall conditioning procedures. These measurements demonstrated the capability to perform inter shot measurements at a single location, and spatially resolved measurements over longer timescales. This demonstration showed the first in-situ measurements of surfaces in a magnetic fusion device with spatial and temporal resolution which constitutes a major step forward in fusion PMI science. In addition, an external ion beam system was implemented to perform ex-situ ion beam analysis (IBA) for components from Alcator C-Mod Tokamak. This project involved the refurbishment of a 1.7 MV tandem linear accelerator and the creation of a linear accelerator facility to provide IBA capabilities for MIT Plasma Science and Fusion Center. The external beam system was used to perform particle induced gamma emission (PIGE) analysis on tile modules removed after the AIMS measurement campaign in order to validate the AIMS using the well established PIGE technique. From these external PIGE measurements, a spatially resolved map of boron areal density was constructed for a section of C-Mod inner wall tiles that overlapped with the AIMS measurement locations. These measurements showed the complexity of the poloidal and toroidal variation of boron areal density between PFC tiles on the inner wall ranging from 0 to 3pm of boron. Using these well characterized ex-situ measurements to corroborate the in-situ measurements, AIMS showed reasonable agreement with PIGE, thus validating the quantitative surface analysis capability of the AIMS technique.
by Harold Salvadore Barnard.
Sc. D.
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McMullin, Nathan K. "Numerical simulation of plasma-based actuator vortex control of a turbulent cylinder wake /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1558.pdf.

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Gangolf, Thomas. "Intense laser-plasma interactions with gaseous targets for energy transfer and particle acceleration." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX110.

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Le plus fréquemment, l’interaction laser-matière est étudiée avec des lasers ayant des longueurs d’onde dans l’infrarouge proche (PIR), car ce sont les lasers qui peuvent générer les impulsions les plus intenses. Pour ces lasers, des cibles de densité allant de 0,05 à 2,5 fois la densité critique sont difficiles à créer mais elles offrent des perspectives intéressantes. Dans cette thèse, des jets d’hydrogène ayant de densité dans ce domaine sont utilisées dans le contexte de deux applications :Premièrement, des ions sont accélérées par choc non-collisionnel (collisionless shock acceleration, CSA). Lors de l’interaction d’une impulsion laser PIR avec une cible légè- rement sur-critique, un faisceau de protons est généré. Il est collimé, dirigé vers l’avant et quasiment monoénergetique. Des simulations indiquent que cela est lié à la formation d’un choc non-collisionnel et à l’accélération des protons par ce choc, en sus de leur accélération par le processus standard dit ”target normal sheath acceleration (TNSA)” qui est effectif en face arrière de la cible. Pour beaucoup d’applications, ces faisceaux de particules quasi-monoénergetiques sont plus appropriés que ceux à spectre large qui sont générés de façon routinière par TNSA.Deuxièmement, de l’énergie est transférée d’une impulsion laser (pump) vers une autre en contrepropagation (seed), par rétrodiffusion Brillouin stimulée, dans le régime de couplage fort (strong coupling-SBS), à des densités entre 0,05 et 0,2 fois la densité critique. Pour des impulsions à large bande (60 nanomètres), le rôle de la pré-ionisation sur la propagation et la rétrodiffusion Brillouin spontanée et stimulée est étudié, en incluant l’influence du chirp. Pour des lasers à bande plus étroite, il est démontré que l’impulsion seed peut être amplifiée par des dizaines de milliJoules, et des signatures d’amplification efficace et d’affaiblissement de l’impulsion laser pompe sont trouvées. Ce concept vise à l’amplification des impulsions laser à des puissances au-delà du seuil de dommage des amplificateurs laser basés sur des matériaux solides
Laser-matter interaction is studied mostly with near-infrared (NIR) lasers as they can generate the most intense pulses. For these lasers, targets between 0.05 to 2.5 times the critical density are challenging to create but offer interesting prospects. In this thesis, novel high-density Hydrogen gas jet targets with densities in this range are used in view of two applications:First, ions are accelerated by collisionless shock acceleration (CSA). Upon interaction of a NIR laser with a slightly overcritical gas jet target, a collimated, quasi-monoenergetic proton beam is generated in forward direction. Simulations indicate the formation of a collisionless shock and acceleration of protons both by the shock and target normal sheath acceleration (TNSA) on the target rear surface under these conditions. These directed, monoenergetic particle bunches are more suitable for many applications than the broadband particle beams already generated routinely.Second, at densities between 0.05 and 0.2 times the critical density, energy is transferred from one laser pulse (pump) to a counterpropagating pulse (seed), via Stimulated Brillouin Backscattering in the strongly-coupled regime (sc-SBS). For the case of broad- band (60 nanometers) pulses, the role of the preionization for pulse propagation and both spontaneous and stimulated Brillouin backscattering are studied, including the influence of the chirp. It is shown that for narrower bandwidths, the seed pulse is ampli- fied by tens of millijoules, and signatures of efficient amplification and pump depletion are found. This concept aims at amplifying laser pulses to powers above the damage thresholds of solid state amplifiers
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PEREGO, CLAUDIO. "Target normal sheath acceleration for laser-driven ion generation: advances in theoretical modeling." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/41758.

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Recently, ultra-intense laser-driven ion acceleration has turned out to be an extremely interesting phenomenon, capable to produce ion beams which could potentially be suitable for applications as hadron therapy or dense matter diagnostics. The present PhD thesis is addressed to the study of Target Normal Sheath Acceleration (TNSA), namely the laser-based ion acceleration mechanism which dominates the presently accessible experimental conditions. The work is focused in particular on the theoretical modeling of TNSA, motivated by the need for an effective description which, by adopting proper approximations that can limit the required computational efforts, is capable to provide reliable predictions on the resulting ion beam features, given an initial laser-target configuration. Indeed, the development of a robust TNSA theoretical model would mean a deeper comprehension of the key physical factors governing the process, allowing at the same time to draw guidelines for potential experiments in the next future. In this dissertation, in order to achieve a significant advancement in the TNSA modeling field, the results of two original works are reported, the first is focused on a critical, quantitative analysis of existing descriptions, and the second, starting from the conclusions of such an analysis, is dedicated to the extension of a specific model, aiming at the inclusion of further, crucial, TNSA aspects. The quantitative analysis consists in the comparison of six well-known published descriptions, relying on their capability in estimating the maximum ion energy, which is tested over an extensive database of published TNSA experimental results, covering a wide range of laser-target conditions. Such a comparative study, despite the technical issues to be faced in order to reduce the arbitrariness of the results, allows to draw some interesting conclusions about the effectiveness of the six models considered and about TNSA effective modeling in general. According to the results, the quasi-static model proposed by M. Passoni and M. Lontano turns out to be the most reliable in predicting the ion cut-off energy, at the same time achieving such estimates through a self-consistent treatment of the accelerating potential. This work highlights also the limits of such a TNSA model, and of the main approximations usually adopted to obtain the different maximum ion energy estimates. Thus, starting from such considerations, an extension of this Passoni-Lontano model is proposed, including new crucial elements of TNSA physics within the description. In particular, further insights of the hot electron population dynamics are implemented, leading to a refined maximum energy prediction, which exhibits more solid theoretical bases, and which broadens the predicting capability of the original model to a larger range of system parameters. The resulting estimates are validated by means of literature experimental data and numerical simulations, demonstrating a remarkable agreement in most of the cases. The achieved model turns out to be particularly suitable in reproducing the maximum ion energy dependence on the target thickness, while some promising insights are obtained in the Mass Limited Targets (MLT) case. Nonetheless, further theoretical work is still required to attain a quantitative agreement with recently published experimental results on MLTs.
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Hillenbrand, Steffen [Verfasser], and A. S. [Akademischer Betreuer] Müller. "Study of Plasma-Based Acceleration for High Energy Physics and Other Applications / Steffen Hillenbrand. Betreuer: A.-S. Müller." Karlsruhe : KIT-Bibliothek, 2013. http://d-nb.info/1054397163/34.

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Mehrling, Timon Johannes [Verfasser], and Jens [Akademischer Betreuer] Osterhoff. "Theoretical and numerical studies on the transport of transverse beam quality in plasma-based accelerators / Timon Johannes Mehrling. Betreuer: Jens Osterhoff." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1064077358/34.

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Beaurepaire, Benoit. "Développement d’un accélérateur laser-plasma à haut taux de répétition pour des applications à la diffraction ultra-rapide d’électrons." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX013/document.

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La microscopie électronique et la diffraction d’électrons ont permis de comprendre l’organisation des atomes au sein de la matière. En utilisant une source courte temporellement, il devient possible de mesurer les déplacements atomiques ou les modifications de la distribution électronique dans des matériaux. A ce jour, les sources ultra-brèves pour les expériences de diffraction d’électrons ne permettent pas d’atteindre une résolution temporelle inférieure à la centaine de femtosecondes (fs). Les accélérateurs laser-plasma sont de bons candidats pour atteindre une résolution temporelle de l’ordre de la femtoseconde. De plus, ces accélérateurs peuvent fonctionner à haut taux de répétition, permettant d’accumuler un grand nombre de données.Dans cette thèse, un accélérateur laser-plasma fonctionnant au kHz a été développé et construit. Cette source accélère des électrons à une énergie de 100 keV environ à partir d’impulsions laser d’énergie 3 mJ et de durée 25 fs. La physique de l’accélération a été étudiée, démontrant entre autres l’effet du front d’onde laser sur la distribution transverse des électrons.Les premières expériences de diffraction avec ce type de sources ont été réalisées. Une expérience de preuve de principe a montré que la qualité de la source est suffisante pour obtenir de belles images de diffraction sur des feuilles d’or et de silicium. Dans un second temps, la dynamique structurelle d’un échantillon de Silicium a été étudiée avec une résolution temporelle de quelques picosecondes, démontrant le potentiel de ce type de sources.Pour augmenter la résolution temporelle à sub-10 fs, il est nécessaire d’accélérer les électrons à des énergies relativistes de quelques MeV. Une étude numérique a montré que l’on peut accélérer des paquets d’électrons ultra-courts grâce à des impulsions laser de 5 mJ et 5 fs. Il serait alors possible d’atteindre une résolution temporelle de l’ordre de la femtoseconde. Finalement, une expérience de post-compression des impulsions laser due à l’ionisation d’un gaz a été réalisée. La durée du laser a pu être réduite d’un facteur deux, et l’homogénéité de ce processus a été étudiée expérimentalement et numériquement
Electronic microscopy and electron diffraction allowed the understanding of the organization of atoms in matter. Using a temporally short source, one can measure atomic displacements or modifications of the electronic distribution in matter. To date, the best temporal resolution for time resolved diffraction experiments is of the order of a hundred femtoseconds (fs). Laser-plasma accelerators are good candidates to reach the femtosecond temporal resolution in electron diffraction experiments. Moreover, these accelerators can operate at a high repetition rate, allowing the accumulation of a large amount of data.In this thesis, a laser-plasma accelerator operating at the kHz repetition rate was developed and built. This source generate electron bunches at 100 keV from 3 mJ and 25 fs laser pulses. The physics of the acceleration has been studied, and the effect of the laser wavefront on the electron transverse distribution has been demonstrated.The first electron diffraction experiments with such a source have been realized. An experiment, which was a proof of concept, showed that the quality of the source permits to record nice diffraction patterns on gold and silicium foils. In a second experiment, the structural dynamics of a silicium sample has been studied with a temporal resolution of the order of a few picoseconds.The electron bunches must be accelerated to relativistic energies, at a few MeV, to reach a sub-10 fs temporal resolution. A numerical study showed that ultra-short electron bunches can be accelerated using 5 fs and 5 mJ laser pulses. A temporal resolution of the order of the femtosecond could be reached using such bunches for electron diffraction experiments. Finally, an experiment of the ionization-induced compression of the laser pulses has been realized. The pulse duration was shorten by a factor of 2, and the homogeneity of the process has been studied experimentally and numerically
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Yi, Sunghwan. "Injection in plasma-based electron accelerators." 2012. http://hdl.handle.net/2152/19461.

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Plasma-based accelerators aim to efficiently generate relativistic electrons by exciting plasma waves using a laser or particle beam driver, and "surfing" electrons on the resulting wakefields. In the blowout regime of such wakefield acceleration techniques, the intense laser radiation pressure or beam fields expel all of the plasma electrons transversely, forming a region completely devoid of electrons ("bubble") that co-propagates behind the driver. Injection, where initially quiescent background plasma electrons become trapped inside of the plasma bubble, can be caused by a variety of mechanisms such as bubble expansion, field ionization or collision between pump and injector pulses. This work will present a study of the injection phenomenon through analytic modeling and particle-in-cell (PIC) simulations. First, an idealized model of a slowly expanding spherical bubble propagating at relativistic speeds is used to demonstrate the importance of the bubble's structural dynamics in self-injection. This physical picture of injection is verified though a reduced PIC approach which makes possible the modeling of problem sizes intractable to first-principles codes. A more realistic analytic model which takes into account the effects of the detailed structure of the fields surrounding the bubble in the injection process is also derived. Bubble expansion rates sufficient to cause injection are characterized. A new mechanism for generation of quasi-monoenergetic electron beams through field ionization induced injection is presented, and simulation results are compared to recent experimental results. Finally, a technique for frequency-domain holographic imaging of the evolving bubble is analyzed using PIC as well as a novel simulation method for laser probe beam propagation.
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Books on the topic "Plasma-Based Accelerator"

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Xu, Xinlu. Phase Space Dynamics in Plasma Based Wakefield Acceleration. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2381-6.

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Xu, Xinlu. Phase Space Dynamics in Plasma Based Wakefield Acceleration. Springer Singapore Pte. Limited, 2021.

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Xu, Xinlu. Phase Space Dynamics in Plasma Based Wakefield Acceleration. Springer, 2020.

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Book chapters on the topic "Plasma-Based Accelerator"

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Nishida, Y. "Plasma—Based Particle Acceleration." In Dusty and Dirty Plasmas, Noise, and Chaos in Space and in the Laboratory, 559–67. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-1829-7_47.

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Gauduel, Yann A. "Laser-Plasma Accelerators Based Ultrafast Radiation Biophysics." In Biological and Medical Physics, Biomedical Engineering, 19–50. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31563-8_2.

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Xu, Xinlu. "X-FELs Driven by Plasma Based Accelerators." In Springer Theses, 75–85. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2381-6_4.

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Chen, Szu-yuan, Robert Wagner, Anatoly Maksimchuk, and Donald Umstadter. "Generation of Ultrashort Electron Bunches Using Table-Top Laser-Plasma-Based Electron Accelerators." In Springer Series in Chemical Physics, 418–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72289-9_125.

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Fonseca, R. A., L. O. Silva, F. S. Tsung, V. K. Decyk, W. Lu, C. Ren, W. B. Mori, et al. "OSIRIS: A Three-Dimensional, Fully Relativistic Particle in Cell Code for Modeling Plasma Based Accelerators." In Lecture Notes in Computer Science, 342–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-47789-6_36.

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Lebedev, Valeri, Alexey Burov, and Sergei Nagaitsev. "Luminosity Limitations of Linear Colliders Based on Plasma Acceleration." In Reviews of Accelerator Science and Technology, 187–207. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813209589_0009.

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Evans, R. G. "Plasma Based Accelerators." In Laser-Plasma Interactions 4, 351–78. CRC Press, 2020. http://dx.doi.org/10.1201/9781003070436-13.

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Malik, Hitendra K. "Plasma-Based Particle Acceleration Technology." In Laser-Matter Interaction for Radiation and Energy, 175–204. CRC Press, 2021. http://dx.doi.org/10.1201/b21799-6.

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Kasani, Hadi, Mohammad Taghi Ahmadi, Rasoul Khoda-Bakhsh, and Dariush Rezaei Ochbelagh. "Fast Neuron Detection." In Handbook of Research on Nanoelectronic Sensor Modeling and Applications, 395–422. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0736-9.ch015.

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In many research fields and industry such as nuclear physics, notably nuclear technology, fusion plasma diagnostics, radiotherapy and radiation protection, it is very substantial that measure fast neutron spectra. For example in nuclear reactor primary generated neutrons have energies around 2 MeV that lie fast neutron category. Also particle accelerators and Am-Be neutron source raise fast neutrons. Therefore a review of silicon based fast neutron detection with proton recoil methods is surveyed. Furthermore Carbon nanoparticles (CNPs) with simple and low cost preparation methods with exceptional electrical properties have been used widely in nanoelectronic applications such as radiation sensors. In this chapter, fast neutron detectors using Carbon based semiconductor, back-to-back Schottky diode type, and polyethylene as convertor are developed and the Am-Be fast neutron source is used in experimental measurements.
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Pérez-Suárez, David, Paul A. Higgins, D. Shaun Bloomfield, R. T. James McAteer, Larisza D. Krista, Jason P. Byrne, and Peter T. Gallagher. "Automated Solar Feature Detection for Space Weather Applications." In Applied Signal and Image Processing, 207–25. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-477-6.ch013.

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The solar surface and atmosphere are highly dynamic plasma environments, which evolve over a wide range of temporal and spatial scales. Large-scale eruptions, such as coronal mass ejections, can be accelerated to millions of kilometers per hour in a matter of minutes, making their automated detection and characterisation challenging. Additionally, there are numerous faint solar features, such as coronal holes and coronal dimmings, which are important for space weather monitoring and forecasting, but their low intensity and sometimes transient nature makes them problematic to detect using traditional image processing techniques. These difficulties are compounded by advances in ground- and space- based instrumentation, which have increased the volume of data that solar physicists are confronted with on a minute-by-minute basis; NASA’s Solar Dynamics Observatory for example is returning many thousands of images per hour (~1.5 TB/day). This chapter reviews recent advances in the application of images processing techniques to the automated detection of active regions, coronal holes, filaments, CMEs, and coronal dimmings for the purposes of space weather monitoring and prediction.
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Conference papers on the topic "Plasma-Based Accelerator"

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Clayton, C. E. "Plasma-based acceleration concepts." In ADVANCED ACCELERATOR CONCEPTS. ASCE, 1997. http://dx.doi.org/10.1063/1.53038.

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Sokollik, T., S. Shiraishi, J. Osterhoff, E. Evans, A. J. Gonsalves, K. Nakamura, J. van Tilborg, et al. "Tape-Drive Based Plasma Mirror." In ADVANCED ACCELERATOR CONCEPTS: 14th Advanced Accelerator Concepts Workshop. AIP, 2010. http://dx.doi.org/10.1063/1.3520320.

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Michel, P., C. B. Schroeder, B. A. Shadwick, E. Esarey, and W. P. Leemans. "Radiative Damping in Plasma-Based Accelerators." In ADVANCED ACCELERATOR CONCEPTS: 12th Advanced Accelerator Concepts Workshop. AIP, 2006. http://dx.doi.org/10.1063/1.2409183.

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Schroeder, C. B., E. Esarey, and W. P. Leemans. "Operational plasma density and laser parameters for future colliders based on laser-plasma accelerators." In ADVANCED ACCELERATOR CONCEPTS: 15th Advanced Accelerator Concepts Workshop. AIP, 2013. http://dx.doi.org/10.1063/1.4773817.

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Schroeder, C. B. "Trapping and Dark Current in Plasma-Based Accelerators." In ADVANCED ACCELERATOR CONCEPTS: Eleventh Advanced Accelerator Concepts Workshop. AIP, 2004. http://dx.doi.org/10.1063/1.1842592.

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O'Shea, Brendan, James Rosenzweig, Samuel Barber, Atsushi Fukasawa, Oliver Williams, Patric Muggli, Vitaly Yakimenko, and Karl Kusche. "Transformer ratio improvement for beam based plasma accelerators." In ADVANCED ACCELERATOR CONCEPTS: 15th Advanced Accelerator Concepts Workshop. AIP, 2013. http://dx.doi.org/10.1063/1.4773766.

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Gonsalves, A. J., K. Nakamura, C. Lin, J. Osterhoff, S. Shiraishi, C. B. Schroeder, C. G. R. Geddes, et al. "Plasma Channel Diagnostic Based on Laser Centroid Oscillations." In ADVANCED ACCELERATOR CONCEPTS: 14th Advanced Accelerator Concepts Workshop. AIP, 2010. http://dx.doi.org/10.1063/1.3520304.

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Mittelberger, D. E., K. Nakamura, N. H. Matlis, H. S. Mao, A. J. Gonsalves, J. Daniels, E. Esarey, and W. P. Leemans. "Ionization-based spectral phase diagnostic for laser plasma accelerators." In ADVANCED ACCELERATOR CONCEPTS 2016: 16th Advanced Accelerator Concepts Workshop. Author(s), 2016. http://dx.doi.org/10.1063/1.4965615.

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Nishida, Yasushi. "Large amplitude wakefield excitation and particle acceleration in high density plasma for plasma based accelerator." In Laser interaction and related plasma phenomena: 12th international conference. AIP, 1996. http://dx.doi.org/10.1063/1.50484.

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Frolko, Pavel A. "Plasma source based on helicon discharge for a plasma accelerator." In OPEN MAGNETIC SYSTEMS FOR PLASMA CONFINEMENT (OS2016): Proceedings of the 11th International Conference on Open Magnetic Systems for Plasma Confinement. Author(s), 2016. http://dx.doi.org/10.1063/1.4964237.

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Reports on the topic "Plasma-Based Accelerator"

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Schroeder, Carl B. Plasma-based accelerator structures. Office of Scientific and Technical Information (OSTI), December 1999. http://dx.doi.org/10.2172/753106.

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Paul F. Schmit and Nathaniel J. Fisch. Plasma-based Accelerator with Magnetic Compression. Office of Scientific and Technical Information (OSTI), June 2012. http://dx.doi.org/10.2172/1057479.

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Shuets, G. Theoretical Investigations of Plasma-Based Accelerators and Other Advanced Accelerator Concepts. Office of Scientific and Technical Information (OSTI), May 2004. http://dx.doi.org/10.2172/825197.

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Whyte, Dennis. DEVELOPMENT OF AN ACCELERATOR-BASED DIAGNOSTIC FOR PLASMA-FACING SURFACES IN MAGNETIC CONFINEMENT DEVICES. Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1760345.

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Yampolsky, Nikolai, Scott Luedtke, Evgenya Simakov, Stephen Milton, Sandra Biedron, and Bjorn Hegelich. Feasibility study for the hard x-ray free electron laser based on synergistic use of conventional and plasma accelerator technologies. Office of Scientific and Technical Information (OSTI), October 2022. http://dx.doi.org/10.2172/1891797.

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Esarey, Eric, and Carl B. Schroeder. Physics of Laser-driven plasma-based acceleration. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/843065.

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Fermi Research Alliance, LLC. Maximizing the efficiency of plasma-based lepton accelerators. Office of Scientific and Technical Information (OSTI), January 2020. http://dx.doi.org/10.2172/1617210.

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Shvets, Gennady. Investigations of the plasma and structure based accelerators. Office of Scientific and Technical Information (OSTI), March 2017. http://dx.doi.org/10.2172/1346862.

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Shvets, Gennady. Investigations of the plasma and structure based accelerators. Office of Scientific and Technical Information (OSTI), August 2012. http://dx.doi.org/10.2172/1049502.

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Nakamura, Kei. Control of Laser Plasma Based Accelerators up to 1 GeV. Office of Scientific and Technical Information (OSTI), December 2007. http://dx.doi.org/10.2172/941427.

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