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Zeitschriftenartikel zum Thema „Fast BEMs“

Autor: Grafiati

Veröffentlicht am 23. November 2024

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1

Chaillat, S., J. F. Semblat und M. Bonnet. „A Preconditioned 3-D Multi-Region Fast Multipole Solver for Seismic Wave Propagation in Complex Geometries“. Communications in Computational Physics 11, Nr. 2 (Februar 2012): 594–609. http://dx.doi.org/10.4208/cicp.231209.030111s.

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AbstractThe analysis of seismic wave propagation and amplification in complex geological structures requires efficient numerical methods. In this article, following up on recent studies devoted to the formulation, implementation and evaluation of 3-D single- and multi-region elastodynamic fast multipole boundary element methods (FM-BEMs), a simple preconditioning strategy is proposed. Its efficiency is demonstrated on both the single- and multi-region versions using benchmark examples (scattering of plane waves by canyons and basins). Finally, the preconditioned FM-BEM is applied to the scattering of plane seismic waves in an actual configuration (alpine basin of Grenoble, France), for which the high velocity contrast is seen to significantly affect the overall efficiency of the multi-region FM-BEM.

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2

Fontana, Marco, Pietro Casalone, Sergej Antonello Sirigu, Giuseppe Giorgi, Giovanni Bracco und Giuliana Mattiazzo. „Viscous Damping Identification for a Wave Energy Converter Using CFD-URANS Simulations“. Journal of Marine Science and Engineering 8, Nr. 5 (17.05.2020): 355. http://dx.doi.org/10.3390/jmse8050355.

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During the optimization phase of a wave energy converter (WEC), it is essential to be able to rely on a model that is both fast and accurate. In this regard, Computational Fluid Dynamic (CFD) with Reynolds Averaged Navier–Stokes (RANS) approach is not suitable for optimization studies, given its computational cost, while methods based on potential theory are fast but not accurate enough. A good compromise can be found in boundary element methods (BEMs), based on potential theory, with the addition of non-linearities. This paper deals with the identification of viscous parameters to account for such non-linearities, based on CFD-Unsteady RANS (URANS) analysis. The work proposes two different methodologies to identify the viscous damping along the rotational degree of freedom (DOF) of pitch and roll: The first solely involves the outcomes of the CFD simulations, computing the viscous damping coefficients through the logarithmic decrement method, the second approach solves the Cummins’ equation of motion, via a Runge-Kutta scheme, selecting the damping coefficients that minimize the difference with CFD time series. The viscous damping is mostly linear for pitch and quadratic for roll, given the shape of the WEC analysed.

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3

MENG, WENHUI, und JUNZHI CUI. „COMPARATIVE STUDY OF TWO DIFFERENT FMM–BEM METHODS IN SOLVING 2-D ACOUSTIC TRANSMISSION PROBLEMS WITH A MULTILAYERED OBSTACLE“. International Journal of Structural Stability and Dynamics 11, Nr. 01 (Februar 2011): 197–214. http://dx.doi.org/10.1142/s021945541100404x.

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The fast multipole method (FMM) is an effective approach for accelerating the computation efficiency of the boundary element method (BEM) in solving problems that are computationally intensive. This paper presents two different BEMs, i.e., Kress' and Seydou's methods, for solving two-dimensional (2D) acoustic transmission problems with a multilayered obstacle, along with application of the FMM to solution of the related boundary integral equations. Conventional BEM requires O(MN2) operations to compute the equations for this problem. By using the FMM, both the amount of computation and the memory requirement of the BEM are reduced to order O(MN), where M is the number of layers of the obstacle. The efficiency and accuracy of this approach in dealing with the acoustic transmission problems containing a multilayered obstacle are demonstrated in the numerical examples. It is confirmed that this approach can be applied to solving the acoustic transmission problems for an obstacle with multilayers.

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4

Renard-Le Galloudec, N., und E. D'Humieres. „New micro-cones targets can efficiently produce higher energy and lower divergence particle beams“. Laser and Particle Beams 28, Nr. 3 (September 2010): 513–19. http://dx.doi.org/10.1017/s0263034610000510.

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AbstractSmall conical targets have been used in high intensity laser target interaction mostly in the context of fast ignition. We demonstrate that when cone targets are shaped appropriately and used with specific interaction conditions, they can produce particle beams of higher maximum energy and number in a lower angular divergence than flat targets. This is relevant to fast ignition, small compact particle beams, medical applications, focused ion and/or electron beam microscopes. This fact carries the potential to produce particle beams that are no longer limited by the characteristics of the laser. Note that for fast ignition, reducing the divergence of the beam lowers the energy requirement and enhances the energy deposition into the compressed fuel.

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5

Badziak, J. „Laser-driven generation of fast particles“. Opto-Electronics Review 15, Nr. 1 (01.01.2007): 1–12. http://dx.doi.org/10.2478/s11772-006-0048-3.

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AbstractThe great progress in high-peak-power laser technology has resulted recently in the production of ps and subps laser pulses of PW powers and relativistic intensities (up to 1021 W/cm2) and has laid the basis for the construction of multi-PW lasers generating ultrarelativistic laser intensities (above 1023 W/cm2). The laser pulses of such extreme parameters make it possible to produce highly collimated beams of electrons or ions of MeV to GeV energies, of short time durations (down to subps) and of enormous currents and current densities, unattainable with conventional accelerators. Such particle beams have a potential to be applied in numerous fields of scientific research as well as in medicine and technology development. This paper is focused on laser-driven generation of fast ion beams and reviews recent progress in this field. The basic concepts and achievements in the generation of intense beams of protons, light ions, and multiply charged heavy ions are presented. Prospects for applications of laser-driven ion beams are briefly discussed.

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6

Saw, S. H., und S. Lee. „Plasma Focus Scaled for Neutrons, Soft X-Rays, Fast Ion Beams, and Fast Plasma Streams“. Kathmandu University Journal of Science, Engineering and Technology 10, Nr. 2 (31.12.2014): 42–49. http://dx.doi.org/10.3126/kuset.v10i2.63653.

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Being an intense source of neutrons, soft x-rays, ion beams and fast plasma streams, the plasma focus promises applications such as fusion energy, advanced microlithography, materials synthesizing and testing, radiation diagnostics, medical isotopes and imaging. This paper reviews the scaling laws of neutrons, soft x-rays, ion beams and fast plasma streams derived from extensive numerical experiments conducted over the past 7 years.

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7

Razueva, E. V., und E. G. Abramochkin. „Fast Rotating Spiral Light Beams“. EPJ Web of Conferences 103 (2015): 10011. http://dx.doi.org/10.1051/epjconf/201510310011.

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8

Heber, O., D. Zajfman, D. Kella, Z. Vager, R. L. Watson und V. Horvat. „Molecular imaging with fast beams“. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 99, Nr. 1-4 (Mai 1995): 90–93. http://dx.doi.org/10.1016/0168-583x(94)00620-2.

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9

Ergun, R. E., C. W. Carlson, L. Muschietti, I. Roth und J. P. McFadden. „Properties of fast solitary structures“. Nonlinear Processes in Geophysics 6, Nr. 3/4 (31.12.1999): 187–94. http://dx.doi.org/10.5194/npg-6-187-1999.

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Abstract. We present detailed observations of electromagnetic waves and particle distributions from the Fast Auroral SnapshoT (FAST) satellite which reveal many important properties of large-amplitude, spatially-coherent plasma structures known as "fast solitary structures" or "electron phase space holes". Similar structures have been observed in several regions of the magnetosphere including the auroral zone, plasma sheet boundary layer, and bow shock. There has been rapid theoretical progress in understanding these structures. Solitary structures can develop from bidirectional electron beams. Once developed, the one-dimensional properties parallel to the magnetic field can be adequately described by analytical treatment as BGK structures. There remains, however, several unanswered questions. The origin of the bidirectional electron beams, the development of two-or three-dimensional structures, and the observed association with the ion cyclotron frequency are not well understood.

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10

Schatz, Hendrik. „Nuclear astrophysics with fast radioactive beams“. Journal of Physics G: Nuclear and Particle Physics 31, Nr. 10 (12.09.2005): S1633—S1638. http://dx.doi.org/10.1088/0954-3899/31/10/046.

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11

Honrubia, J. J., C. D. Enriquez, J. C. Fernández und M. Hegelich. „Fast ignition by quasimonoenergetic ion beams“. EPJ Web of Conferences 59 (2013): 03013. http://dx.doi.org/10.1051/epjconf/20135903013.

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12

Gade, Alexandra. „Nuclear spectroscopy with fast exotic beams“. Physica Scripta T152 (01.01.2013): 014004. http://dx.doi.org/10.1088/0031-8949/2013/t152/014004.

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13

Clark, P. U. „Fast Glacier Flow Over Soft Beds“. Science 267, Nr. 5194 (06.01.1995): 43–44. http://dx.doi.org/10.1126/science.267.5194.43.

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14

Hohlweck, M., T. Köble, F. Meyer, M. Ockenfels, J. Weltz und W. von Witsch. „Investigation of collimated fast-neutron beams“. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 281, Nr. 2 (September 1989): 277–82. http://dx.doi.org/10.1016/0168-9002(89)91325-9.

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15

Gade, A., D. Bazin, B. A. Brown, C. M. Campbell, J. A. Church, D.-C. Dinca, J. Enders et al. „Nuclear spectroscopy with fast exotic beams“. Journal of Physics: Conference Series 20 (01.01.2005): 95–100. http://dx.doi.org/10.1088/1742-6596/20/1/016.

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16

Schatz, Hendrik. „Nuclear Astrophysics with Fast Radioactive Beams“. Acta Physica Hungarica A) Heavy Ion Physics 25, Nr. 2-4 (01.04.2006): 169–74. http://dx.doi.org/10.1556/aph.25.2006.2-4.3.

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17

Steck, Markus. „Cooling of fast charged particle beams“. Journal of the Optical Society of America B 20, Nr. 5 (01.05.2003): 1016. http://dx.doi.org/10.1364/josab.20.001016.

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18

Zhao, Shun Bo, Peng Bing Hou und Fu Lai Qu. „Laboratory Fast Corrosion Test of Plain Steel Bars in Concrete Beams“. Advanced Materials Research 535-537 (Juni 2012): 1803–6. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1803.

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An experimental study was carried out to examine the non-uniform corrosion of plain steel bars in reinforced concrete beams partially placed in 5% sodium chloride solution under conditions of accelerated corrosion. 4 reinforced concrete beams with different concrete strength were made. The crack distributions of the beams due to pre-loads and expansion of corrosion product, and the sectional corrosion characteristics of plain steel bars are described in detail. The sectional area loss relating to mass loss and change along pure bending length of the beams are discussed. These can be used as the basis of test for further studies to build the numerical models of serviceability of corroded reinforced concrete beams.

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19

Liu, Zhaocai, Ziqi Song und Yi He. „Economic Analysis of On-Route Fast Charging for Battery Electric Buses: Case Study in Utah“. Transportation Research Record: Journal of the Transportation Research Board 2673, Nr. 5 (03.04.2019): 119–30. http://dx.doi.org/10.1177/0361198119839971.

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Battery electric buses (BEBs) are increasingly being embraced by transit agencies as an energy-efficient and emission-free alternative to bus fleets. However, because of the limitations of battery technology, BEBs suffer from limited driving range, great battery cost, and time-consuming charging processes. On-route fast charging technology is gaining popularity as a remedy, reducing battery cost, extending driving range, and reducing charging time. With on-route fast charging, BEBs are as capable as their diesel counterparts in relation to range and operating time. However, transit agencies may have the following concerns about on-route fast charging: 1) on-route fast charging stations require massive capital costs; 2) on-route fast charging may lead to high electricity power demand charges; and 3) charging during peak hours may increase electricity energy charges. This study conducts a quantitative economic analysis of on-route fast charging for BEBs, thereby providing some guidelines for transit agencies. An integrated optimization model is first proposed to determine battery size, charger type, and recharging schedule for a general BEB route. Based on the model, an economic analysis of on-route fast charging is then performed on 10 real-world bus routes and a simplified general bus route with different parameters. The results demonstrate that given the current prices of on-route fast charging stations and batteries, it is always beneficial to install on-route fast charging stations for BEBs. A sensitivity analysis is also conducted to show the impact of potential price reductions of batteries.

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20

Golubev, A., M. Basko, A. Fertman, A. Kozodaev, N. Mesheryakov, B. Sharkov, A. Vishnevskiy et al. „Dense plasma diagnostics by fast proton beams“. Physical Review E 57, Nr. 3 (01.03.1998): 3363–67. http://dx.doi.org/10.1103/physreve.57.3363.

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21

Saathoff, G., S. Reinhardt, B. Bernhardt, R. Holzwarth, Th Udem, T. W. Hänsch, D. Bing et al. „Testing Time Dilation on Fast Ion Beams“. Journal of Physics: Conference Series 312, Nr. 10 (23.09.2011): 102014. http://dx.doi.org/10.1088/1742-6596/312/10/102014.

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22

Madrak, R., und D. Wildman. „A fast chopper for medium energy beams“. Journal of Instrumentation 9, Nr. 10 (30.10.2014): T10009. http://dx.doi.org/10.1088/1748-0221/9/10/t10009.

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23

Prisciandaro, J. I., A. C. Morton und P. F. Mantica. „Beta counting system for fast fragmentation beams“. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 505, Nr. 1-2 (Juni 2003): 140–43. http://dx.doi.org/10.1016/s0168-9002(03)01037-4.

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24

Schatz, H. „Nuclear Astrophysics with Fast Rare Isotope Beams“. Nuclear Physics A 787, Nr. 1-4 (Mai 2007): 299–308. http://dx.doi.org/10.1016/j.nuclphysa.2006.12.046.

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25

Duncan, W., S. J. Arnott und J. R. Williams. „RBE in radiotherapy with fast neutron beams“. British Journal of Radiology 58, Nr. 690 (Juni 1985): 577. http://dx.doi.org/10.1259/0007-1285-58-690-577.

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26

Ellis, F., und H. Weatherburn. „RBE in radiotherapy with fast neutron beams“. British Journal of Radiology 58, Nr. 690 (Juni 1985): 578. http://dx.doi.org/10.1259/0007-1285-58-690-578.

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27

Wilhelm, Klaus, William Bernstein, Paul J. Kellogg und Brian A. Whalen. „Fast magnetospheric echoes of energetic electron beams“. Journal of Geophysical Research: Space Physics 90, A1 (01.01.1985): 491–504. http://dx.doi.org/10.1029/ja090ia01p00491.

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28

Honrubia, J. J., J. C. Fernández, M. Temporal, B. M. Hegelich und J. Meyer-ter-Vehn. „Fast ignition by laser-driven carbon beams“. Journal of Physics: Conference Series 244, Nr. 2 (01.08.2010): 022038. http://dx.doi.org/10.1088/1742-6596/244/2/022038.

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29

Anne, R., D. Bazin, R. Bimbot, M. J. G. Borge, J. M. Corre, S. Dogny, H. Emling et al. „Projectile Coulomb excitation with fast radioactive beams“. Zeitschrift f�r Physik A Hadrons and Nuclei 352, Nr. 4 (Dezember 1995): 397–401. http://dx.doi.org/10.1007/bf01299757.

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30

Adánez, J., P. Gayán, F. García-Labiano und L. F. de Diego. „Axial voidage profiles in fast fluidized beds“. Powder Technology 81, Nr. 3 (Dezember 1994): 259–68. http://dx.doi.org/10.1016/0032-5910(94)02906-7.

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31

Amirav, Aviv, und Shai Dagan. „Fast GC-MS in Supersonic Molecular Beams“. Israel Journal of Chemistry 37, Nr. 4 (1997): 475–82. http://dx.doi.org/10.1002/ijch.199700053.

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32

Wei, Wei, Li-yun Fu und Gerrit Blacquière. „Fast multifrequency focal beam analysis for 3D seismic acquisition geometry“. GEOPHYSICS 77, Nr. 2 (März 2012): P11—P21. http://dx.doi.org/10.1190/geo2010-0327.1.

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A method for the efficient computation of multifrequency focal beams for 3D seismic acquisition geometry analysis has been developed. By computing them for all the frequency components of seismic data, single-frequency focal beams can be extended to multifrequency focal beams. However, this straightforward method involves considerable computer time and memory requirements, especially in complex media settings. Therefore, we propose a rapid 3D multifrequency focal beam method in which only a few single-frequency focal beam computations are followed by a number of smart interpolations. The 3D wavefield extrapolation in the focal beam analysis is conducted by the combined applications of a 3D degenerate Fourier migrator and a 3D Born-Kirchhoff interpolation operator, a process that reduces the computational cost for complex media. The multifrequency focal beam analysis is applied to a 3D model from an oil field of China, demonstrating how spatial sampling differences affect seismic imaging.

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33

Cao, Jiefeng, Yong Wang, Ying Zou, Xiangzhi Zhang, Yanqing Wu und Renzhong Tai. „Optimization of the design for beamline with fast polarization switching elliptically polarized undulators“. Journal of Synchrotron Radiation 23, Nr. 2 (20.02.2016): 436–42. http://dx.doi.org/10.1107/s160057751600059x.

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Fast switching of X-ray polarization with a lock-in amplifier is a good method for acquiring weak signals from background noise for X-ray magnetic circular dichroism (XMCD) experiments. The usual way to obtain a beam with fast polarization switching is to use two series of elliptically polarized undulators (tandem twin EPUs). The two EPUs generate two individual beams. Each beam has a different polarization and is fast switched into the beamline. It is very important to ensure that the energy resolution, the flux and the spot size at the sample of the two beams are equal in XMCD experiments. However, it is difficult in beamline design because the distances from the two EPUs to the beamline optics are different and the beamline is not switchable. In this work, a beamline design without an entrance slit for fast polarization switching EPUs is discussed. The energy resolution of the two beams can be tuned to be equal by minor rotation of the optics in the monochromator. The flux of the two beams can be balanced through separation bladesX, Yin the exit slit, and by adjusting the position of theXblades along the beam. The spot size of the two beams can be adjusted to be equal by shifting the sample as well.

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34

Levenspiel, Octave. „G/S reactor models—packed beds, bubbling fluidized beds, turbulent fluidized beds and circulating (fast) fluidized beds“. Powder Technology 122, Nr. 1 (Januar 2002): 1–9. http://dx.doi.org/10.1016/s0032-5910(01)00286-8.

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35

DEUTSCH, C. „Transport of megaelectron volt protons for fast ignition“. Laser and Particle Beams 21, Nr. 1 (Januar 2003): 33–35. http://dx.doi.org/10.1017/s0263034602211076.

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Quasi-linear analysis demonstrates that intense and nonrelativistic proton beams do not lose collectively their kinetic energy through transverse Weibel electromagnetic instabilities when interacting with supercompressed plasmas of inertial confinement interest.

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Tian, Xiaohe, Diana M. Leite, Edoardo Scarpa, Sophie Nyberg, Gavin Fullstone, Joe Forth, Diana Matias et al. „On the shuttling across the blood-brain barrier via tubule formation: Mechanism and cargo avidity bias“. Science Advances 6, Nr. 48 (November 2020): eabc4397. http://dx.doi.org/10.1126/sciadv.abc4397.

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The blood-brain barrier is made of polarized brain endothelial cells (BECs) phenotypically conditioned by the central nervous system (CNS). Although transport across BECs is of paramount importance for nutrient uptake as well as ridding the brain of waste products, the intracellular sorting mechanisms that regulate successful receptor-mediated transcytosis in BECs remain to be elucidated. Here, we used a synthetic multivalent system with tunable avidity to the low-density lipoprotein receptor–related protein 1 (LRP1) to investigate the mechanisms of transport across BECs. We used a combination of conventional and super-resolution microscopy, both in vivo and in vitro, accompanied with biophysical modeling of transport kinetics and membrane-bound interactions to elucidate the role of membrane-sculpting protein syndapin-2 on fast transport via tubule formation. We show that high-avidity cargo biases the LRP1 toward internalization associated with fast degradation, while mid-avidity augments the formation of syndapin-2 tubular carriers promoting a fast shuttling across.

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Bernardi, Sara, und Annachiara Colombi. „A particle model reproducing the effect of a conflicting flight information on the honeybee swarm guidance“. Communications in Applied and Industrial Mathematics 9, Nr. 1 (01.12.2018): 159–73. http://dx.doi.org/10.2478/caim-2018-0021.

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Abstract The honeybee swarming process is steered by few scout individuals, which are the unique informed on the location of the target destination. Theoretical and experimental results suggest that bee coordinated flight arises from visual signals. However, how the information is passed within the population is still debated. Moreover, it has been observed that honeybees are highly sensitive to conflicting directional information. In fact, swarms exposed to fast-moving bees headed in the wrong direction show clear signs of disrupted guidance. In this respect, we here present a discrete mathematical model to investigate different hypotheses on the behaviour both of informed and uninformed bees. In this perspective, numerical realizations, specifically designed to mimic selected experiments, reveal that only one combination of the considered assumptions is able to reproduce the empirical outcomes, resulting thereby the most reliable mechanism underlying the swarm dynamics according to the proposed approach. Specifically, this study suggests that (i) leaders indicate the right flight direction by repeatedly streaking at high speed pointing towards the target and then slowly coming back to the trailing edge of the bee cloud; and (ii) uninformed bees, in turn, gather the route information by adapting their movement to all the bees sufficiently close to their position.

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Fontana, Cristiano Lino, Bonaldi Cédric, Wouter Geerts, Miguel Macías Martinez, Marzio Vidali und Stephan Oberstedt. „JRC MONNET – the intense fast-neutron source for fundamental and application-driven research“. EPJ Web of Conferences 284 (2023): 06002. http://dx.doi.org/10.1051/epjconf/202328406002.

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MONNET is a fast-neutron source based on a 3.5 MV tandem accelerator, located at the Geel (BE) site of the Joint esearch Centre. It became operational in 2020. MONNET may deliver intense neutron beams in the energy range from 30 keV to 10.1 MeV and from 12.8 MeV to 24 MeV. Neutrons are generated by means of nuclear reactions in the target material (e.g. protons or deuterons on lithium-7, tritium or deuterium targets). MONNET delivers a neutron flux of up to 109 n/sr/s, depending on the producing reaction and the neutron energy. Neutron beams are essentially mono-energetic (∆En/En < 6% with En > 300 keV). The accelerator may also be used with proton and deuteron beams. Alpha beams will be offered soon. Photon beams are possible and presently under investigation. The research program ranges from cross section measurements, e.g. (n, f), (n, p), (n, α) as well as (p, p′), (p, n) and (p, γ), nuclear fission research, material studies (e.g. radiation-induced damage), to the investigation of advanced methods in nuclear technologies, safety and security. The MONNET neutron source offers beamtime to external user within the JRC EUFRAT Open Access program. Proposal evaluation by an independent panel is taking place up to two times per year.

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Treffert, Franziska, Chandra B. Curry, Todd Ditmire, Griffin D. Glenn, Hernan J. Quevedo, Markus Roth, Christopher Schoenwaelder, Marc Zimmer, Siegfried H. Glenzer und Maxence Gauthier. „Towards High-Repetition-Rate Fast Neutron Sources Using Novel Enabling Technologies“. Instruments 5, Nr. 4 (03.12.2021): 38. http://dx.doi.org/10.3390/instruments5040038.

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High-flux, high-repetition-rate neutron sources are of interest in studying neutron-induced damage processes in materials relevant to fusion, ultimately guiding designs for future fusion reactors. Existing and upcoming petawatt laser systems show great potential to fulfill this need. Here, we present a platform for producing laser-driven neutron beams based on a high-repetition-rate cryogenic liquid jet target and an adaptable stacked lithium and beryllium converter. Selected ion and neutron diagnostics enable monitoring of the key parameters of both beams. A first single-shot proof-of-principle experiment successfully implemented the presented platform at the Texas Petawatt Laser facility, achieving efficient generation of a forward-directed neutron beam. This work lays the foundation for future high-repetition-rate experiments towards pulsed, high-flux, fast neutron sources for radiation-induced effect studies relevant for fusion science and applications that require neutron beams with short pulse duration.

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Trentadue, Germana, Rosanna Pinto, Marco Salvetti, Marco Zanni, Konstantinos Pliakostathis, Harald Scholz und Giorgio Martini. „Assessment of Low‐Frequency Magnetic Fields Emitted by DC Fast Charging Columns“. Bioelectromagnetics 41, Nr. 4 (11.02.2020): 308–17. http://dx.doi.org/10.1002/bem.22254.

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41

Nassisi, Vincenzo, Domenico Delle Side und Vito Turco. „Very Fast Current Diagnostic for Linear Pulsed Beams“. EPJ Web of Conferences 167 (2018): 02006. http://dx.doi.org/10.1051/epjconf/201816702006.

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Annotation:

Fast current pulses manage lasers and particle accelerators and require sophisticate systems to be detected. At today Rogowski coils are well known. They are designed and built with a toroidal structure. In recently application, flat transmission lines are imploded and for this reason we develop a linear Rogowski coil to detect current pulses inside flat conductors. To get deep information from the system, it was approached by means of the theory of the transmission lines. The coil we build presents a resistance but it doesn’t influence the rise time of the response, instead the integrating time. We also studied the influence of the magnetic properties of coil support. The new device was able to record pulses of more hundred nanoseconds depending on the inductance, load impedance and resistance of the coil. Furthermore, its response was characterized by a sub-nanosecond rise time (~100 ps), The attenuation coefficient depends mainly on the turn number of the coil, while the quality of the response depends both on the manufacture quality of the coil and on the magnetic core characteristics. In biophysical applications often, a double line is employed in order to have a sample as control and a sample stressed by a light source. So, in this case we build two equal plane lines by 100 Ω characteristic resistance connected in parallel. We diagnosed the current present in a line. The attenuation factor resulted to be 11,5 A/V.

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42

Blomgren, J. „Fast neutron beams--prospects for the coming decade“. Radiation Protection Dosimetry 126, Nr. 1-4 (13.05.2007): 64–68. http://dx.doi.org/10.1093/rpd/ncm014.

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43

Brandstatter, B. „Fast reconstruction of beams in intense proton accelerators“. IEEE Transactions on Magnetics 38, Nr. 2 (März 2002): 1113–16. http://dx.doi.org/10.1109/20.996285.

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44

Loncol, Th, S. Vynckier und A. Wambersie. „Thermoluminescence in Proton and Fast Neutron Therapy Beams“. Radiation Protection Dosimetry 66, Nr. 1 (01.07.1996): 299–304. http://dx.doi.org/10.1093/oxfordjournals.rpd.a031739.

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45

Jansen, G. H. „Fast Monte Carlo simulation of charged particle beams“. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 5, Nr. 1 (Januar 1987): 146. http://dx.doi.org/10.1116/1.583849.

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46

Roth, M., T. E. Cowan, M. H. Key, S. P. Hatchett, C. Brown, W. Fountain, J. Johnson et al. „Fast Ignition by Intense Laser-Accelerated Proton Beams“. Physical Review Letters 86, Nr. 3 (15.01.2001): 436–39. http://dx.doi.org/10.1103/physrevlett.86.436.

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47

Ujvári, T., A. Tóth, I. Bertóti, P. M. Nagy und A. Juhász. „Surface treatment of polyethylene by fast atom beams“. Solid State Ionics 141-142 (Mai 2001): 225–29. http://dx.doi.org/10.1016/s0167-2738(01)00750-0.

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48

Broerse, J. J. „The Physics and Radiobiology of Fast Neutron Beams“. International Journal of Radiation Biology 59, Nr. 4 (Januar 1991): 1069–70. http://dx.doi.org/10.1080/09553009114550941.

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49

Zabala, N., und A. Rivacoba. „Dynamics of fast electron beams and bounded targets“. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 354 (Juli 2015): 105–8. http://dx.doi.org/10.1016/j.nimb.2014.11.015.

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50

Scalliet, P. „The physics and radiobiology of fast neutron beams“. European Journal of Cancer and Clinical Oncology 27, Nr. 10 (Oktober 1991): 1328. http://dx.doi.org/10.1016/0277-5379(91)90107-o.

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