Relevant bibliographies by topics / Cavity beam position monitors

Academic literature on the topic 'Cavity beam position monitors'

Author: Grafiati
Published: 11 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Cavity beam position monitors.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Cavity beam position monitors"

1

Srinivasan, S., S. Brandenburg, J. M. Schippers, and P. A. Duperrex. "Development of a fourfold dielectric-filled reentrant cavity as a beam position monitor (BPM) in a proton therapy facility." Journal of Instrumentation 17, no. 09 (September 1, 2022): P09013. http://dx.doi.org/10.1088/1748-0221/17/09/p09013.

Full text
Abstract:
Abstract At the Paul Scherrer Institute (PSI), the superconducting cyclotron “COMET” delivers a 250 MeV proton beam for radiation therapy in pulses of 1ns at the cyclotron-RF frequency of 72.85 MHz. Accurate measurement of the beam position at proton beam currents of 0.1–10 nA in the beam transport line downstream of the degrader is of crucial importance for the treatment safety and quality, beam alignment and feedback systems. This is essential for efficient operation and beam delivery. These measurements are usually performed with intercepting monitors such as ionization chambers (ICs). In this paper, we present a novel non-intercepting position sensitive cavity resonator. The resonant monitor, tuned to the second harmonic of the cyclotron's RF, is based on the detection of the transverse magnetic dipole mode of the EM field generated by the beam. This mode is only excited for off-center beam positions and is measured with the help of four floating cavities within a common grounded cylinder. This paper discusses the BPM fundamental characteristics, design optimization and the underlying parametric investigations involving the contribution of the different modes and crosstalk. We estimate the expected signals from the prototype BPM for position offsets from simulations and compare them with test-bench measurements and beam measurements with the prototype and the improvised BPM design. We conclude by summarizing the achieved position sensitivity, precision, and measurement bandwidth.
APA, Harvard, Vancouver, ISO, and other styles
2

Lee, Sojeong, In Soo Ko, Changbum Kim, Seunghwan Kim, Juho Hong, and Heungsik Kang. "Design of the X-band cavity beam position monitor." Journal of the Korean Physical Society 63, no. 7 (October 2013): 1322–26. http://dx.doi.org/10.3938/jkps.63.1322.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kim, Y. I., S. T. Boogert, Y. Honda, A. Lyapin, H. Park, N. Terunuma, T. Tauchi, and J. Urakawa. "Principal Component Analysis of cavity beam position monitor signals." Journal of Instrumentation 9, no. 02 (February 28, 2014): P02007. http://dx.doi.org/10.1088/1748-0221/9/02/p02007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Lee, Sojeong, Young Jung Park, Changbum Kim, Seung Hwan Kim, Dong Cheol Shin, Jang-Hui Han, and In Soo Ko. "PAL-XFEL cavity beam position monitor pick-up design and beam test." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 827 (August 2016): 107–17. http://dx.doi.org/10.1016/j.nima.2016.04.057.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Yang, Liu, Xiaozhong He, Shanshan Cao, Linwen Zhang, Renxian Yuan, Yongbin Leng, and Luyang Yu. "A method of bunch by bunch measurement at nanoseconds interval by using cavity beam position monitors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 976 (October 2020): 164270. http://dx.doi.org/10.1016/j.nima.2020.164270.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Bao Peng, Yong Bin Leng, Wei Min Zhou, Lu Yang Yu, and Ying Bing Yan. "Cavity Beam Position Monitor Test System Based on Virtual Instrument." Applied Mechanics and Materials 333-335 (July 2013): 2354–57. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.2354.

Full text
Abstract:
Based on the virtual instrument technology, a dedicated test system has been developed for cavity beam position monitor (CBPM). The system consists of commercial nanopositioning stage and its controller, the analog output DAQ card based on PXI and network analyzer. In the LABVIEW environment, software which implemented function of instrument control and data acquisition based on virtual instrument soft architecture (VISA) has been developed. Experimental results illustrated that the test system achieved positioning precision of sub micron which meets requirement of test of CBPM. Also it could serve CBPM signal processing system.
APA, Harvard, Vancouver, ISO, and other styles
7

Jian-Hua, Chu, Tong De-Chun, and Zhao Zhen-Tang. "RF measurements of a C-band cavity beam position monitor." Chinese Physics C 32, no. 5 (May 2008): 385–88. http://dx.doi.org/10.1088/1674-1137/32/5/012.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Walston, Sean, Stewart Boogert, Carl Chung, Pete Fitsos, Joe Frisch, Jeff Gronberg, Hitoshi Hayano, et al. "Performance of a high resolution cavity beam position monitor system." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 578, no. 1 (July 2007): 1–22. http://dx.doi.org/10.1016/j.nima.2007.04.162.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Yang, Liu, Xiaozhong He, Ruo Tang, Quanhong Long, and Linwen Zhang. "Correction of coupled higher-order modes in the S-parameter characterization of wideband cavity beam position monitors." Review of Scientific Instruments 92, no. 1 (January 1, 2021): 014705. http://dx.doi.org/10.1063/5.0019791.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Shin, S., Eun-San Kim, Hyoung Suk Kim, and Dongchul Son. "Design of a Low-Q S-Band Cavity Beam Position Monitor." Journal of the Korean Physical Society 52, no. 4 (April 15, 2008): 992–98. http://dx.doi.org/10.3938/jkps.52.992.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Cavity beam position monitors"

1

Bromwich, Talitha. "Development of high-resolution cavity beam position monitors for use in low-latency feedback systems." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:7d3fada0-2676-4983-8e2c-16d2d6d4f7d0.

Full text
Abstract:
The FONT beam-based, intra-train feedback system has been designed to provide beam position stabilisation in single-pass accelerators. A FONT feedback system utilising position information from three high-resolution cavity beam position monitors (BPMs) has been commissioned at the interaction point (IP) of the Accelerator Test Facility 2 (ATF2) at KEK, Japan. The ultimate goal of the feedback in the IP region is to stabilise the low-emittance electron beam to the nanometre level. The operation, optimisation and resolution performance of this IP system forms the subject of this thesis. The IP feedback system makes use of beam position measurements from the BPMs to drive an upstream kicker and provide a local correction. The BPMs have a fast decay time of ~25 ns to allow bunches within the beam train to be resolved. The operation of the IP BPMs, the noise floor, and position sensitivity to phase are discussed in detail. Attempts are made to diagnose an unwanted ~60 MHz oscillation in the cavity signals, which is bunch charge-dependent and thus likely beam generated. The BPM resolution estimate was notably improved from 50 nm to 20 nm using waveform integration in analysis of the BPM signals. A multi-parameter fit was used to address inaccurate calibrations and charge-dependencies to achieve more consistent resolution performance and produce a best-ever resolution estimate for the BPMs of 17.5 ± 0.4 nm. A novel mode of IP beam position stabilisation using two BPMs as input to the feedback has been successfully demonstrated. The beam position was stabilised to 57 ± 4 nm, as measured at an independent BPM. Feedback performance was improved to this level by sampling the waveform to optimise bunch-to-bunch correlation. Analysis suggests correction capability could be enhanced by firmware waveform integration to achieve a measurable beam stabilisation of ~40 nm in the future.
APA, Harvard, Vancouver, ISO, and other styles
2

Blaskovic, Kraljevic Neven. "Development of a high-precision low-latency position feedback system for single-pass beamlines using stripline and cavity beam position monitors." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:0286d951-d177-4d3a-8bce-a50e6ccb8645.

Full text
Abstract:
The FONT beam-based, intra-train feedback system has been designed to provide beam stability at single-pass accelerators, such as at the interaction point (IP) of the International Linear Collider. Two FONT feedback systems have been commissioned at the Accelerator Test Facility (ATF) at KEK, Japan, and the operation, optimisation and performance of these systems is the subject of this thesis. For each system, the accelerator is operated with two-bunch trains with a bunch separation of around 200 ns, allowing the first bunch to be measured and the second bunch to be subsequently corrected. The first system consists of a coupled-loop system in which two stripline beam position monitors (BPMs) are used to characterise the incoming beam position and angle, and two kickers are used to stabilise the beam. A BPM resolution of about 300 nm has been measured. On operating the feedback system, a factor ~ 3 reduction in position jitter has been demonstrated at the feedback BPMs and the successful propagation of this correction to a witness BPM located 30 m downstream has been confirmed. The second system makes use of a beam position measurement at the ATF IP that is used to drive a kicker to provide a local correction. The measurement is performed using a high-resolution cavity BPM with a fast decay time of around 20 ns designed to allow multiple bunches to be resolved. The linearity of the cavity BPM system and the noise floor of the electronics are discussed in detail. The performance of the BPM system under standard ATF operation and with the beam waist at the BPM is described. A BPM resolution of about 50 nm has been measured. This IP feedback system has been used to stabilise the beam position to the 75 nm level.
APA, Harvard, Vancouver, ISO, and other styles
3

Sargsyan, Vahagn. "Cavity beam position monitor for the TESLA-cryomodule cross-talk minimization /." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969232640.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Joshi, Nirav Yashvantray. "Design and analysis techniques for cavity beam position monitor systems for electron accelerators." Thesis, Royal Holloway, University of London, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.594166.

Full text
Abstract:
Beam position monitors are required in all accelerators for the measurement and optimization of the beam parameters. Cavity beam position monitors (CBPM) offer the possibility of measurement of beam centroid positions at the nanometer scale. These devices can be and typically are used at electron accelerator facilities, both existing light sources and test facilities proposed for future linear colliders, such as the International Linear Collider (ILC) and Compact Linear Collider (CLIC). The requirements for the CLIC main linac are to measure the beam position using approximately 5000 beam position monitors (BPM) with 50 nm resolution, at every 50 ns. The high resolution, enormous scale of the system and the small bunch separation of 0.5 ns present many challenges and demand innovative approaches for the design and operation of the CBPM system. A cylindrical cavity BPM system has been designed in collaboration with the Diamond Light Source, in the C-Band frequency region. The design ideas, which will be beneficial to CLIC BPM and other designs, such as the deliberate separation of modes coupled to the x and y position measurements and the cavity operation without mechanical tuning are tested in the design. The major resonance modes of the cavity are simulated using Eigenmode simulation. The coupling and isolation characteristics are simulated using S-parameter simulations, while the beam coupling is studied through time domain simulations. Four cavities were fabricated according to the design discussed in this this. Their coupling and isolation were tested through S-parameter measurements. The dipole modes are separated by more than 5 MHz in frequency. The values of the quality factors were measured using the impedance method. The field orientation of the dipole and quadrupole modes were measured using the bead-pull perturbation technique and found to be rotated by 12° and 30 from x-axis respectively. The initial beam studies were carried out at the Diamond Light Source and at the ATF2 beam line, and are presented in this thesis. The techniques for position determination of temporally closely spaced bunches are studied. A method was developed to remove the errors in the position determination, due to the overlap of the signals from the previous bunches, by subtracting the decayed phasors from the previous bunch. The method is applied to the signals from the CBPM system on the ATF2 beam line, in the two and three bunch mode operation. The overestimation in position determination of the second bunch is reduced from more than 67% to less than 2%. Position resolution of better than 3 um is demonstrated for the second bunch. The observed phase difference between the consecutive bunches is studied for different bunch spacing. The performance of the code is verified against simulated data.
APA, Harvard, Vancouver, ISO, and other styles
5

Dal, Forno Massimo. "Theoretical and experimental analysis of interactions between electromagnetic fields and relativistic electrons in vacuum chamber." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8537.

Full text
Abstract:
2011/2012
Il laser ad elettroni liberi (FEL) è una sorgente luminosa di quarta generazione che ha specifiche più stringenti rispetto alle sorgenti luminose di terza generazione, tra le quali ricordiamo i sincrotroni. La cosiddetta emittanza e la traiettoria del fascio determinano la qualità del fascio, e devono soddisfare severi requisiti nei FEL. Per esempio, nella sala ondulatori, la posizione del fascio deve essere misurata con risoluzione micrometrica. Il controllo della posizione del fascio può essere effettuato utilizzando i “Cavity Beam Position Monitor” (Cavity BPM). Questa tesi descrive l’attività di ricerca eseguita sui Cavity BPM. Precisamente, la progettazione, la simulazione elettromagnetica e l'ottimizzazione di un Cavity BPM sono state effettuate. Successivamente, 25 Cavity BPM sono stati fabbricati e installati nella sala ondulatori del progetto FERMI@Elettra. I segnali sono stati acquisiti e processati con un nuovo tipo di elettronica, e una serie di misure sono state effettuate. Il secondo dispositivo studiato in questo dottorato è l'acceleratore lineare di particelle. Tradizionali strutture acceleranti, dotate di un accoppiatore a singolo ingresso causano la degradazione delle proprietà fascio elettronico, a causa dell’ asimmetria del campo elettromagnetico. Un nuovo tipo di accoppiatore, con cortocircuito mobile, viene proposto, nel quale il campo elettrico è stato simmetrizzato. La progettazione, simulazione elettromagnetica e ottimizzazione del dispositivo sono state effettuate, e un prototipo della struttura accelerante è stato prodotto e sintonizzato. Il campo elettrico è stato misurato con il metodo bead-pull. Infine, in questa tesi sono descritti i deflettori RF ad alta energia, che sono degli strumenti di diagnostica in grado di misurare le proprietà fascio elettronico, in particolare la lunghezza del banco di elettroni e lo spazio longitudinale di fase.
The Free Electron Laser (FEL) is a fourth generation light source that has more stringent specifications with respect to the third generation light sources, such as synchrotrons. The so-called emittance and the beam trajectory determine the beam quality, and must satisfy stringent requirements in FELs. For example, in the undulator hall, the beam position must be measured with the micrometer resolution. The control in the beam position can be achieved using a cavity beam position monitor (Cavity BPM). This thesis describes the research performed on the cavity BPM. Precisely, the electromagnetic design, the simulation and the optimization of a cavity BPM have been carried out. Subsequently, 25 cavity BPMs have been manufactured and installed in the undulator hall of the FERMI@Elettra project. A new RF front-end has been set up, and a series of measurements have been performed. The second device studied in this PhD is the travelling wave linear accelerator. Traditional accelerating structures endowed with a single feed coupler cause degradation of the electron beam properties, due to the electromagnetic field asymmetry. A new type of single feed structure with movable short circuit is proposed, where the electric field has been symmetryzed. The electromagnetic design, simulation and optimization of the device have been carried out, and a prototype of the accelerating structure has been produced and tuned. The electric field has been measured with the bead-pull method. Finally, in this thesis are described the High Energy RF Deflector (HERFD), which are a fundamental diagnostic tool to measure the electron beam properties, in particular the bunch length and the longitudinal phase space.
XXV Ciclo
1984
APA, Harvard, Vancouver, ISO, and other styles
6

Swinson, Christina Jane. "Development of beam position monitors for final focus systems at the International Linear Collider." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533884.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

García, Garrigós Juan José. "Development of the Beam Position Monitors for the Diagnostics of the Test Beam Line in the CTF3 at CERN." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/34327.

Full text
Abstract:
The work for this thesis is in line with the field of Instrumentation for Particle Accelerators, so called Beam Diagnostics. It is presented the development of a series of electro-mechanical devices called Inductive Pick-Ups (IPU) for Beam Position Monitoring (BPM). A full set of 17 BPM units (16 + 1 spare), named BPS units, were built and installed into the Test Beam Line (TBL), an electron beam decelerator, of the 3rd CLIC Test Facility (CTF3) at CERN ¿European Organization for the Nuclear Research¿. The CTF3, built at CERN by an international collaboration, was meant to demonstrate the technical feasibility of the key concepts for CLIC ¿Compact Linear Collider¿ as a future linear collider based on the novel two-beam acceleration scheme, and in order to achieve the next energy frontier for a lepton collider in theMulti-TeV scale. Modern particle accelerators and in particular future colliders like CLIC requires an extreme alignment and stabilization of the beam in order to enhance its quality, which rely heavily on a beam based alignment techniques. Here the BPMs, like the BPS-IPU, play an important role providing the beam position with precision and high resolution, besides a beam current measurement in the case of the BPS, along the beam lines. The BPS project carried out at IFIC was mainly developed in two phases: prototyping and series production and test for the TBL. In the first project phase two fully functional BPS prototypes were constructed, focusing in this thesis work on the electronic design of the BPS on-board PCBs (Printed Circuit Boards) which are based on transformers for the current sensing and beam position measurement. Furthermore, it is described the monitor mechanical design with emphasis on all the parts directly involved in its electromagnetic functioning, as a result of the coupling of the EM fields generated by the beam with those parts. For that, it was studied its operational parameters, according the TBL specifications, and it was also simulated a new circuital model reproducing the BPS monitor frequency response for its operational bandwidth (1kHz-100MHz). These prototypes were initially tested in the laboratories of the BI-PI section¿Beam Instrumentation - Position and Intensity¿ at CERN. In the second project phase the BPS monitor series, which were built based on the experience acquired during the prototyping phase, the work was focused on the realization of the characterization tests to measure the main operational parameters of each series monitor, for which it was designed and constructed two test benches with different purposes and frequency regions. The first one is designed to work in the low frequency region, between 1kHz-100MHz, in the time scale of the electron beam pulse with a repetition period of 1s and an approximate duration of 140ns. This kind of test setups called Wire Test-bench are commonly used in the accelerators instrumentation field in order to determine the characteristic parameters of a BPM (or pick-up) like its linearity and precision in the position measurement, and also its frequency response (bandwidth). This is done by emulating a low current intensity beam with a stretched wire carrying a current signals which can be precisely positioned with respect the device under test. This test bench was specifically made for the BPS monitor and conceived to perform the measurement data acquisition in an automated way, managing the measurement equipment and the wire positioning motors controller from a PC workstation. Each one of the BPS monitors series were characterized by using this system at the IFIC labs, and the test results and analysis are presented in this work. On the other hand, the high frequency tests, above the X band in the microwave spectrum and at the time scale of the micro-bunch pulses with a bunching period of 83ps (12GHz) inside a long 140ns pulse, were performed in order to measure the longitudinal impedance of the BPS monitor. This must be low enough in order to minimize the perturbations on the beam produced at crossing the monitor, which affects to its stability during the propagation along the line. For that, it was built the high frequency test bench as a coaxial waveguide structure of 24mm diameter matched at 50¿ and with a bandwidth from 18MHz to 30GHz, which was previously simulated, and having room in the middle to place the BPS as the device under test. This high frequency test bench is able to reproduce the TEM (Transversal Electro-Magnetic) propagative modes corresponding to an ultra-relativistic electron beam of 12GHz bunching frequency, so that the Scattering parameters can be measured to obtain the longitudinal impedance of the BPS in the frequency range of interest. Finally, it is also presented the results of the beam test made in the TBL line, with beam currents from 3.5A to 13A (max. available at the moment of the test). In order to determine the minimum resolution attainable by a BPS monitor in the measurement of the beam position, being the device figure of merit, with a resolution goal of 5¿m at maximum beam current of 28A according to the TBL specifications.
García Garrigós, JJ. (2013). Development of the Beam Position Monitors for the Diagnostics of the Test Beam Line in the CTF3 at CERN [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/34327
TESIS
APA, Harvard, Vancouver, ISO, and other styles
8

Tomás, García Rogelio. "Direct measurement of resonance driving terms in the super proton synchrotron (SPS) of cern using beam position monitors." Doctoral thesis, Universitat de València, 2003. http://hdl.handle.net/10803/9879.

Full text
Abstract:
El objetivo principal de esta tesis consiste en desarrollar un metodo para medir los terminos resonantes del Hamiltoniano de un acelerador mediante la transfomada de Fourier de la posicion del haz vuelta tras vuelta. Dos aspectos fundamentales de este metodo de medida son: el efecto de la decoherencia del haz en el espectro de Fourier y la variacion longitudinal de estos terminos resonantes. Ambos se estudian analiticamente y mediante simulaciones numericas. Con el fin de probar la validez de esta tecnica se realizaron experimentos en dos aceleradores de hadrones: el SPS del CERN y el RHIC del BNL. Por ultimo se estudia como utilizar dipolos AC para que esta tecnica no sea destructiva
The aim of this thesis is to develop a beam based method to measure the Hamiltonian terms of an accelerator by precise Fast Fourier Transform (FFT) of turn-by-turn beam position data. The effect of beam decoherence on the turn-by-turn Fourier spectrum and the longitudinal variation of the resonance terms are studied analytically and via computer simulations. Experiments to validate the proposed technique are performed at the CERN SPS and at the RHIC of BNL. Finally, the improvement of replacing the single kicks by an AC dipole is analytically described
APA, Harvard, Vancouver, ISO, and other styles
9

Bhatt, Heeral. "Design and Development of the Beam Position Monitor Calibration Test Bench : For testing the electrical parameters of the new High Luminosity Large Hadron Collider (HL-LHC) Beam Position Monitors using the Concurrent Engineering Approach." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81200.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Zhang, Pei. "Beam position diagnostics with higher order modes in third harmonic superconducting accelerating cavities." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/beam-position-diagnostics-with-higher-order-modes-in-third-harmonic-superconducting-accelerating-cavities(587aa24b-8adc-4bc6-8f5c-475aa0028d06).html.

Full text
Abstract:
Higher order modes (HOM) are electromagnetic resonant fields. They can be excited by an electron beam entering an accelerating cavity, and constitute a component of the wakefield. This wakefield has the potential to dilute the beam quality and, in the worst case, result in a beam-break-up instability. It is therefore important to ensure that these fields are well suppressed by extracting energy through special couplers. In addition, the effect of the transverse wakefield can be reduced by aligning the beam on the cavity axis. This is due to their strength depending on the transverse offset of the excitation beam. For suitably small offsets the dominant components of the transverse wakefield are dipole modes, with a linear dependence on the transverse offset of the excitation bunch. This fact enables the transverse beam position inside the cavity to be determined by measuring the dipole modes extracted from the couplers, similar to a cavity beam position monitor (BPM), but requires no additional vacuum instrumentation.At the FLASH facility in DESY, 1.3 GHz (known as TESLA) and 3.9 GHz (third harmonic) cavities are installed. Wakefields in 3.9 GHz cavities are significantly larger than in the 1.3 GHz cavities. It is therefore important to mitigate the adverse effects of HOMs to the beam by aligning the beam on the electric axis of the cavities. This alignment requires an accurate beam position diagnostics inside the 3.9 GHz cavities. It is this aspect that is focused on in this thesis. Although the principle of beam diagnostics with HOM has been demonstrated on 1.3 GHz cavities, the realization in 3.9 GHz cavities is considerably more challenging. This is due to the dense HOM spectrum and the relatively strong coupling of most HOMs amongst the four cavities in the third harmonic cryo-module. A comprehensive series of simulations and HOM spectra measurements have been performed in order to study the modal band structure of the 3.9 GHz cavities. The dependencies of various dipole modes on the offset of the excitation beam were subsequently studied using a spectrum analyzer. Various data analysis methods were used: modal identification, direct linear regression, singular value decomposition and k-means clustering. These studies lead to three modal options promising for beam position diagnostics, upon which a set of test electronics has been built. The experiments with these electronics suggest a resolution of 50 micron accuracy in predicting local beam position in the cavity and a global resolution of 20 micron over the complete module. This constitutes the first demonstration of HOM-based beam diagnostics in a third harmonic 3.9 GHz superconducting cavity module. These studies have finalized the design of the online HOM-BPM for 3.9 GHz cavities at FLASH.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Cavity beam position monitors"

1

Minty, Michiko G., and Frank Zimmermann. "Orbit Measurement and Correction." In Particle Acceleration and Detection, 69–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-08581-3_3.

Full text
Abstract:
AbstractIn practice, there are many uncertainties whose presence must be appreciated when correcting the beam orbit in both linear and circular accelerators. Such uncertainties include the variations in the electronic and/or mechanical centers of the beam position monitors (BPMs), in the magnetic center of the quadrupoles (inside which the position monitors are often mounted), or in the electromagnetic center of accelerating structures. Consider the case illustrated in Fig. 3.1.
APA, Harvard, Vancouver, ISO, and other styles
2

Wang, Kai, Kedong Wang, Kun Zhu, Huilin Ge, Xicheng Xie, Tingru Zhu, Hao Wang, et al. "Cavity BPM Design for Laser-Driven Proton Therapy Facility." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde221163.

Full text
Abstract:
The construction of the new laser-driven proton therapy facility (CLAPA-II), designed by Peking University, has begun in Beijing. This paper describes the design of a cavity beam position monitor (CBPM) for the CLAPA-II. The proton beam which is accelerated to 100 MeV by 2-PW Laser has parameters of 108∼1010 particles range, 1 Hz repetition rate, 20∼40 mm beam length range. A non-interceptor BPM is needed to characterize the beam motion state in real time. The simulation has been performed to study CBPM properties and cross-talk.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Cavity beam position monitors"

1

Lorenz, Ronald. "Cavity beam position monitors." In The eighth beam instrumentation workshop. AIP, 1998. http://dx.doi.org/10.1063/1.57039.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Walston, S., C. Chung, P. Fitsos, J. Gronberg, M. Ross, O. Khainovski, Y. Kolomensky, et al. "Resolution of a high performance cavity beam position monitor system." In 2007 IEEE Particle Accelerator Conference. IEEE, 2007. http://dx.doi.org/10.1109/pac.2007.4440059.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Waldschmidt, G., R. Lill, and L. Morrison. "Electromagnetic design of the RF cavity beam position monitor for the LCLS." In 2007 IEEE Particle Accelerator Conference (PAC). IEEE, 2007. http://dx.doi.org/10.1109/pac.2007.4441013.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kim, Jin-Soo. "Design of a Standing-Wave Multi-Cavity Beam-Monitor for Simultaneous Beam Position and Emittance Measurements." In ADVANCED ACCELERATOR CONCEPTS: Eleventh Advanced Accelerator Concepts Workshop. AIP, 2004. http://dx.doi.org/10.1063/1.1842568.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ghigo, A., F. Sannibale, M. Serio, and C. Vaccarezza. "The DAɸNE beam position monitors." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52290.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Johnson, Jeff. "DARHT AXIS II Beam Position Monitors." In BEAM INSTRUMENTATION WORKSHOP 2004: Eleventh Beam Instrumentation Workshop. AIP, 2004. http://dx.doi.org/10.1063/1.1831163.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Barr, D. "LEDA beam diagnostics instrumentation: Beam position monitors." In The ninth beam instrumentation workshop. AIP, 2000. http://dx.doi.org/10.1063/1.1342601.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Vismara, Giuseppe. "Signal processing for beam position monitors." In The ninth beam instrumentation workshop. AIP, 2000. http://dx.doi.org/10.1063/1.1342578.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Unser, Klaus B. "New generation electronics applied to beam position monitors." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52329.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ye, K., L. Ma, and H. Huang. "The calibration of BEPC beam position monitors." In The eighth beam instrumentation workshop. AIP, 1998. http://dx.doi.org/10.1063/1.57011.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Cavity beam position monitors"

1

Johnson, R. AN X-BAND CAVITY FOR A HIGH PRECISION BEAM POSITION MONITOR. Office of Scientific and Technical Information (OSTI), December 2003. http://dx.doi.org/10.2172/826577.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Barry, W. Inductive megahertz beam position monitors for CEBAF. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/6360210.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Shen, X., M. Bai, and S. Y. Lee. Noise estimation of beam position monitors at RHIC. Office of Scientific and Technical Information (OSTI), February 2014. http://dx.doi.org/10.2172/1121843.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ross, Marc C. RF CAVITY BPM'S AS BEAM ANGLE AND BEAM CORRELATION MONITORS. Office of Scientific and Technical Information (OSTI), May 2003. http://dx.doi.org/10.2172/813157.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ekdahl, Carl, and William Broste. Correcting Magnetic-Field Diffusion Effects in Beam Position Monitors. Office of Scientific and Technical Information (OSTI), July 2022. http://dx.doi.org/10.2172/1879354.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Russell, S. J., J. D. Gilpatrick, J. F. Power, and R. B. Shurter. Characterization of beam position monitors for measurement of second moment. Office of Scientific and Technical Information (OSTI), May 1995. http://dx.doi.org/10.2172/72985.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ekdahl, Carl, William Broste, and Jeffrey Johnson. Magnetic-Field Diffusion Effects in Beam Position Monitors I: Theory. Office of Scientific and Technical Information (OSTI), July 2022. http://dx.doi.org/10.2172/1876769.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

McCrady, Rodney Craig. Algorithm for Beam Position and Phase Monitors in the LANSCE Linac. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1186032.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kahana, E., and Y. Chung. Commissioning results of the APS storage ring rf beam position monitors. Office of Scientific and Technical Information (OSTI), July 1996. http://dx.doi.org/10.2172/270783.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Shu, D., J. Barraza, T. M. Kuzay, G. Naylor, and P. Elleaume. Tests of the APS X-ray transmitting beam position monitors at ESRF. Office of Scientific and Technical Information (OSTI), October 1997. http://dx.doi.org/10.2172/555513.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Cavity beam position monitors' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography