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Articles de revues sur le sujet « Cavity beam position monitors »

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Auteur : Grafiati
Publié le 11 mars 2023

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1

Srinivasan, S., S. Brandenburg, J. M. Schippers et 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 (1 septembre 2022) : P09013. http://dx.doi.org/10.1088/1748-0221/17/09/p09013.

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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.
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2

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

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3

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

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4

Lee, Sojeong, Young Jung Park, Changbum Kim, Seung Hwan Kim, Dong Cheol Shin, Jang-Hui Han et 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 (août 2016) : 107–17. http://dx.doi.org/10.1016/j.nima.2016.04.057.

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5

Yang, Liu, Xiaozhong He, Shanshan Cao, Linwen Zhang, Renxian Yuan, Yongbin Leng et 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 (octobre 2020) : 164270. http://dx.doi.org/10.1016/j.nima.2020.164270.

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6

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

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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.
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7

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

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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 (juillet 2007) : 1–22. http://dx.doi.org/10.1016/j.nima.2007.04.162.

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9

Yang, Liu, Xiaozhong He, Ruo Tang, Quanhong Long et 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 (1 janvier 2021) : 014705. http://dx.doi.org/10.1063/5.0019791.

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10

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

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11

Heo, A., E. S. Kim, H. Kim, D. Son, Y. Honda et T. Tauchi. « Development of an S-band cavity Beam Position Monitor for ATF2 ». Journal of Instrumentation 8, no 04 (15 avril 2013) : P04011. http://dx.doi.org/10.1088/1748-0221/8/04/p04011.

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12

Su, Jia-Hang, Ying-Chao Du, Jian-Fei Hua, Shu-Xin Zheng, Jia-Qi Qiu, Jin Yang, Wen-Hui Huang, Huai-Bi Chen et Chuan-Xiang Tang. « Design and cold test of a rectangular cavity beam position monitor ». Chinese Physics C 37, no 1 (janvier 2013) : 017002. http://dx.doi.org/10.1088/1674-1137/37/1/017002.

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13

Seunghwan Shin et Manfred Wendt. « Design Studies for a High Resolution Cold Cavity Beam Position Monitor ». IEEE Transactions on Nuclear Science 57, no 4 (août 2010) : 2159–66. http://dx.doi.org/10.1109/tns.2010.2049503.

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14

Xiaochao, M., Yu I. Maltseva, O. I. Meshkov, M. V. Arsentyeva, E. V. Bekhtenev, V. G. Cheskidov, V. M. Borin et al. « Beam diagnostics for linear accelerator of SKIF synchrotron light source ». Journal of Instrumentation 17, no 04 (1 avril 2022) : T04001. http://dx.doi.org/10.1088/1748-0221/17/04/t04001.

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Abstract As the injector of the new fourth-generation SKIF synchrotron light source at the BINP SB RAS (Novosibirsk, Russia), the linear accelerator will provide a 200 MeV electron beam. A precise measurement of the beam is very important for the control of the linac and even the entire light source. A set of diagnostic instruments for tuning the linac and measuring the beam parameters starting from the electron RF gun to the output of accelerator has been designed. The instrumentation should cover the dynamic diagnostic range of 0.6 to 200 MeV and a beam duration from the initial 100 ps to 3 ps at the output of the accelerator. The set includes eight fluorescent screens to measure beam transverse size, two Cherenkov probes and RF-cavity sensors to record beam duration, a dipole magnetic spectrometer to measure energy and energy spread, a Faraday cup (FC) and fast current transformers (FCTs) to measure beam charge current, and beam position monitors (BPMs) to check the beam position. This paper aims to give an overview of the beam instrumentation and briefly describes the design and parameters of each diagnostic system. The results of numerical and dynamics simulations of some of the instruments are briefed. Possible scenarios of linac tuning are discussed.
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15

Walston, Sean, Stewart Boogert, Carl Chung, Pete Fitsos, Joe Frisch, Jeff Gronberg, Hitoshi Hayano et al. « A metrology system for a high resolution cavity beam position monitor system ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 728 (novembre 2013) : 53–58. http://dx.doi.org/10.1016/j.nima.2013.05.196.

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16

Xiang, Li, et Zheng Shu-Xin. « Simulation and experiments for the Q ext of a cavity beam position monitor ». Chinese Physics C 34, no 3 (mars 2010) : 405–8. http://dx.doi.org/10.1088/1674-1137/34/3/020.

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17

Maesaka, H., H. Ego, S. Inoue, S. Matsubara, T. Ohshima, T. Shintake et Y. Otake. « Sub-micron resolution rf cavity beam position monitor system at the SACLA XFEL facility ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 696 (décembre 2012) : 66–74. http://dx.doi.org/10.1016/j.nima.2012.08.088.

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18

Huang, E. C., C. E. Taylor, P. K. Roy et J. Upadhyay. « Results of the first implementation of RF phase signature matching at LANSCE ». Journal of Instrumentation 17, no 02 (1 février 2022) : T02007. http://dx.doi.org/10.1088/1748-0221/17/02/t02007.

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Abstract The LINAC at the Los Alamos Neutron Science Center (LANSCE) has been utilizing the Delta-t method to match the RF cavities to the design acceleration parameters since its commissioning in 1972. The differences in time-of-flight between two subsequent Beam Position and Phase Monitors (BPPMs) are measured with both accelerated and drifting beams, depending on the whether the module is set to on or off. The algorithm optimizes the module amplitude and phase via iterative measurements if the initial phase is in the vicinity of the design value. With an upgrade to a faster readout system, a scan over the whole RF cavity phase range requires relatively less time than the classical optimization procedure. The Phase Scan Signature Matching (PSSM) method provides a time-efficient method that ensures the phase selection lands on the bunching side and empowers future analyses to build module-specific models. The PSSM also utilizes a direct model to determine the correct amplitude to sub-percent level instead of using linearized matrices. Furthermore, lacking a reliable energy measurement method in the LINAC, we measure the beam phases at two downstream locations to increase the precision of energy measurements. In this letter, we also discuss the sensitivities of PSSM, error propagation, and the implementation results for the 2019 and 2020 beam cycles.
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19

FERRARIO, M., V. FUSCO, M. MIGLIORATI et L. PALUMBO. « EMITTANCE DEGRADATION DUE TO WAKE FIELDS IN A HIGH BRIGHTNESS PHOTOINJECTOR ». International Journal of Modern Physics A 22, no 23 (20 septembre 2007) : 4214–34. http://dx.doi.org/10.1142/s0217751x07037779.

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Wake fields effects in addition to space charge forces may have an important impact during the emittance compensation process in a high brightness photo-injector. To study this effect we developed an upgraded version of the Homdyn code including off axis beam dynamics and wake fields. Homdyn describes a bunch as a uniformly charged cylinder, divided in cylindrical slices; in the upgraded version each slice's centroid can be transversally displaced from the nominal axis thus inducing wake fields. When the bunch is short as compared to the beam pipe radius, wake fields for a single cavity are calculated using methods of diffraction theory; instead we use, for a periodic collection of cavities, an asymptotic wake field obtained numerically at SLAC and then fitted to a simple function. As a first application we studied and verified a correction scheme for the SPARC photo-injector to control the bunch trajectory and angle at the entrance of the undulator. The correction scheme consists of a number of steering magnets and beam position monitors placed along the photo-injector. Two different steering approaches are analyzed and the emittance degradation is studied. The code demonstrates the steering positions and number do correct the bunch's orbit and angle and gives good results concerning the emittance degradation. The emittance and energy spread degradation due to wake fields in the emittance meter experiment is also discussed.
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20

Li, Xiang, et Shu-Xin Zheng. « Design and experiments for the waveguide to coaxial cable adapter of a cavity beam position monitor ». Chinese Physics C 35, no 1 (janvier 2011) : 79–82. http://dx.doi.org/10.1088/1674-1137/35/1/016.

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21

Dal Forno, Massimo, Paolo Craievich, Roberto Baruzzo, Raffaele De Monte, Mario Ferianis, Giuseppe Lamanna et Roberto Vescovo. « A novel electromagnetic design and a new manufacturing process for the cavity BPM (Beam Position Monitor) ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 662, no 1 (janvier 2012) : 1–11. http://dx.doi.org/10.1016/j.nima.2011.09.040.

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22

Srinivasan, Sudharsan, et Pierre-André Duperrex. « Dielectric-Filled Reentrant Cavity Resonator as a Low-Intensity Proton Beam Diagnostic ». Instruments 2, no 4 (7 novembre 2018) : 24. http://dx.doi.org/10.3390/instruments2040024.

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Measurement of the proton beam current (0.1–40 nA) at the medical treatment facility PROSCAN at the Paul Scherrer Institut (PSI) is performed with ionization chambers. To mitigate the scattering issues and to preserve the quality of the beam delivered to the patients, a non-interceptive monitor based on the principle of a reentrant cavity resonator has been built. The resonator with a fundamental resonance frequency of 145.7 MHz was matched to the second harmonic of the pulse repetition rate (72.85 MHz) of the beam extracted from the cyclotron. This was realized with the help of ANSYS HFSS (High Frequency Structural Simulator) for network analysis. Both, the pickup position and dielectric thickness were optimized. The prototype was characterized with a stand-alone test bench. There is good agreement between the simulated and measured parameters. The observed deviation in the resonance frequency is attributed to the frequency dependent dielectric loss tangent. Hence, the dielectric had to be resized to tune the resonator to the design resonance frequency. The measured sensitivity performances were in agreement with the expectations. We conclude that the dielectric reentrant cavity resonator is a promising candidate for measuring low proton beam currents in a non-destructive manner.
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23

Kim, Jin-Soo, Roger Miller et Christopher Nantista. « Design of a standing-wave multicell radio frequency cavity beam monitor for simultaneous position and emittance measurement ». Review of Scientific Instruments 76, no 7 (juillet 2005) : 073302. http://dx.doi.org/10.1063/1.1946407.

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24

Noh, Seon Yeong, Eun-San Kim, Ji-Gwang Hwang, A. Heo, Si won Jang, Nikolay A. Vinokurov, Young UK Jeong, Seong Hee Park et Kyu-Ha Jang. « Development of an S-band cavity-type beam position monitor for a high power THz free-electron laser ». Review of Scientific Instruments 86, no 1 (janvier 2015) : 014703. http://dx.doi.org/10.1063/1.4905532.

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25

He, Zhenqiang, Tong Wang, Xiaolong Wang, Shang Lu, Huachang Liu, Xiao Li, Lingling Men et al. « A new laser-based monitoring method for the cryomodule components alignment ». Measurement Science and Technology 33, no 7 (21 avril 2022) : 075201. http://dx.doi.org/10.1088/1361-6501/ac656b.

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Abstract Alignment of superconducting cavities is one of the important issues for the China Spallation Neutron Source Phase II (CSNS II) linac. In order to obtain the cavity displacement in the process of cooling down to the liquid helium temperature, a laser-based Poisson Spot Monitor (PSM) system was newly proposed and a verification system in the laboratory was built. The PSM system uses the diffraction spot formed on the CMOS camera after a beam of parallel laser passes through a spherical target to monitor the position of the measured object, where the spherical target is fixed on the monitored object. The displacement during the cooling process of the cryomodule is replaced by the movement of the high-precision two-axis motorized translation stage. A spherical target is fixed on the translation stage as the monitoring object. A beam of parallel laser passes through the spherical monitoring target to form a Poisson spot image on a CMOS camera. The coordinates of the Poisson spot center are obtained through image processing. Through experiments, the PSM system obtained a high accuracy within 5 μm, which meets the displacement monitoring requirement of the CSNS II cryomodule components. The system is fairly simple and able to be constructed without highly specialized parts and can also be used in other high-precision alignment and monitoring fields.
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26

Gaupp, A., et F. P. Wolf. « Beam position monitors ». Synchrotron Radiation News 1, no 3 (mai 1988) : 27–31. http://dx.doi.org/10.1080/08940888808602499.

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27

Kamps, T. « Calibration of waveguide beam position monitors ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 445, no 1-3 (mai 2000) : 348–50. http://dx.doi.org/10.1016/s0168-9002(00)00141-8.

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28

Billing, Michael G. « Beam position monitors for storage rings ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 266, no 1-3 (avril 1988) : 144–54. http://dx.doi.org/10.1016/0168-9002(88)90374-9.

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29

Shafer, Robert E. « Characteristics of Directional Coupler Beam Position Monitors ». IEEE Transactions on Nuclear Science 32, no 5 (1985) : 1933–37. http://dx.doi.org/10.1109/tns.1985.4333772.

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30

Kastriotou, M., A. Degiovanni, F. S. Domingues Sousa, E. Effinger, E. B. Holzer, J. L. Navarro Quirante, E. N. del Busto et al. « RF Cavity Induced Sensitivity Limitations on Beam Loss Monitors ». Physics Procedia 77 (2015) : 21–28. http://dx.doi.org/10.1016/j.phpro.2015.11.005.

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31

Hahn, U., T. Kamps, R. Lorenz, W. Riesch, H. J. Schreiber et F. Tonisch. « Waveguide monitors—a new type of beam position monitors for the TTF FEL ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 527, no 3 (juillet 2004) : 240–52. http://dx.doi.org/10.1016/j.nima.2004.03.178.

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32

Luo Qing, 罗箐, 孙葆根 Sun Baogen, 何多慧 He Duohui, 卢平 Lu Ping, 王晓辉 Wang Xiaohui et 方佳 Fang Jia. « Beam position moniter with racetrack cavity ». High Power Laser and Particle Beams 22, no 7 (2010) : 1635–39. http://dx.doi.org/10.3788/hplpb20102207.1635.

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33

Shokair, Isaac R. « Measuring axially varying beam position using B‐dot monitors ». Review of Scientific Instruments 60, no 9 (septembre 1989) : 2969–74. http://dx.doi.org/10.1063/1.1140637.

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34

Kudo, Togo, Hideki Aoyagi, Hideaki Shiwaku, Yoshiharu Sakurai et Hideo Kitamura. « Electronics for SPring-8 X-ray beam monitors ». Journal of Synchrotron Radiation 5, no 3 (1 mai 1998) : 630–31. http://dx.doi.org/10.1107/s0909049597017329.

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A sensitive current-measuring system is required to construct a highly sensitive X-ray beam-position monitor (XBPM). A current–voltage converter (I/V) which can measure currents between 0.1 nA and 10 mA was designed, and the signal processing system of the XBPM was constucted using this I/V. This system was used in beamline commissioning. Beam-position data standard deviations of σ ≃ 3 µm for the bending-magnet beamline, and σ x ≃ 3 µm and σ y ≃ 1 µm for the insertion-device beamline were obtained during the beamline commissioning.
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35

Wollmann, Daniel, Andriy A. Nosych, Gianluca Valentino, Oliver Aberle, Ralph W. Aßmann, Alessandro Bertarelli, Christian Boccard et al. « Beam feasibility study of a collimator with in-jaw beam position monitors ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 768 (décembre 2014) : 62–68. http://dx.doi.org/10.1016/j.nima.2014.09.024.

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36

Nakagawa, Takafumi, et Shuhei Nakata. « Effects of Beam Size on Beam Position Measurements Made with Electrostatic Monitors ». Japanese Journal of Applied Physics 32, Part 1, No. 7 (15 juillet 1993) : 3265–69. http://dx.doi.org/10.1143/jjap.32.3265.

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37

Russell, Steven J. « Emittance measurements of the Sub-Picosecond Accelerator electron beam using beam position monitors ». Review of Scientific Instruments 70, no 2 (février 1999) : 1362–66. http://dx.doi.org/10.1063/1.1149598.

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Bekhtenev, Evgeny, et Gennadiy Karpov. « Automated Stand for Measurements of Electrostatic Beam Position Monitors Parameters ». Siberian Journal of Physics 7, no 4 (1 décembre 2012) : 49–56. http://dx.doi.org/10.54362/1818-7919-2012-7-4-49-56.

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A stand for measurements of the electrostatic beam position monitors (BPM) parameters is described. BPM parameters are measured with help of movable antenna modeling the charged-particle beam. Moving of the antenna is performed on two orthogonal directions with help of stepping motors. Full automation facilitates the measurements of BPM coordinate grid with high position resolution. Stand electronics allows BPM parameters measurements with high accuracy. Measurements at the stand performed with BPMs have demonstrated repeatability of the measurements results at level of 10–15 microns what satisfies all requirements to stand. The stand described in the paper was used for quality control of electrostatic BPM production
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39

Nida, Selamnesh, Alexander Tsibizov, Thomas Ziemann, Judith Woerle, Andy Moesch, Clemens Schulze-Briese, Claude Pradervand et al. « Silicon carbide X-ray beam position monitors for synchrotron applications ». Journal of Synchrotron Radiation 26, no 1 (1 janvier 2019) : 28–35. http://dx.doi.org/10.1107/s1600577518014248.

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In this work, the performance of thin silicon carbide membranes as material for radiation hard X-ray beam position monitors (XBPMs) is investigated. Thermal and electrical behavior of XBPMs made from thin silicon carbide membranes and single-crystal diamond is compared using finite-element simulations. Fabricated silicon carbide devices are also compared with a 12 µm commercial polycrystalline diamond XBPM at the Swiss Light Source at the Paul Scherrer Institute. Results show that silicon carbide devices can reach equivalent transparencies while showing improved linearity, dynamics and signal-to-noise ratio compared with commercial polycrystalline diamond XBPMs. Given the obtained results and availability of electronic-grade epitaxies on up to 6 inch wafers, it is expected that silicon carbide can substitute for diamond in most beam monitoring applications, whereas diamond, owing to its lower absorption, could remain the material of choice in cases of extreme X-ray power densities, such as pink and white beams.
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40

Denard, J. C., K. L. Bane, J. Bijleveld, A. M. Hutton, J. L. Pellegrin, L. Rivkin, P. Wang et J. N. Weaver. « Parasitic Mode Losses versus Signal Sensitivity in Beam Position Monitors ». IEEE Transactions on Nuclear Science 32, no 5 (1985) : 2000–2002. http://dx.doi.org/10.1109/tns.1985.4333794.

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41

Fuchs, Martin R., Karsten Holldack, Mark Bullough, Susanne Walsh, Colin Wilburn, Alexei Erko, Franz Schäfers et Uwe Mueller. « Transmissive x-ray beam position monitors with submicron position- and submillisecond time resolution ». Review of Scientific Instruments 79, no 6 (juin 2008) : 063103. http://dx.doi.org/10.1063/1.2938400.

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42

Hahn, U., W. Brefeld, M. Hesse, J. R. Schneider, H. Schulte-Schrepping, M. Seebach et M. Werner. « Beam-position monitors in the X-ray undulator beamline at PETRA ». Journal of Synchrotron Radiation 5, no 3 (1 mai 1998) : 627–29. http://dx.doi.org/10.1107/s0909049597013940.

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At the 12 GeV storage ring PETRA, the first synchrotron radiation beamline uses a 4 m-long undulator. The beamline, with a length of 130 m between source and sample, delivers hard X-ray photons usable up to 300 keV. The photon beam has a total power of 7 kW. Combined with the high brilliance, the powerful beam is very critical for all beamline components. Copper, located at a distance of 26 m, hit by the full undulator beam, melts within 20 ms. Different monitors are described for stable, safe and reliable operation of beam and experiments.
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Wang, M. W., S. X. Zheng, Z. M. Wang, M. T. Qiu, X. L. Guan, W. H. Huang et X. W. Wang. « Beam momentum spread measurement using two beam position monitors at Xi’an Proton Application Facility ». Review of Scientific Instruments 90, no 10 (1 octobre 2019) : 103305. http://dx.doi.org/10.1063/1.5120758.

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Wendt, Manfred. « A Brief Introduction to Beam Position Monitors for Charged Particle Accelerators ». IEEE Instrumentation & ; Measurement Magazine 24, no 9 (décembre 2021) : 21–32. http://dx.doi.org/10.1109/mim.2021.9620043.

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Herrmann, S., P. Hart, M. Freytag, J. Pines, M. Weaver, L. Sapozhnikov, S. Nelson et al. « Diode readout electronics for beam intensity and position monitors for FELs ». Journal of Physics : Conference Series 493 (31 mars 2014) : 012014. http://dx.doi.org/10.1088/1742-6596/493/1/012014.

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46

Liebendorfer, Adam. « Algorithm quickly relays beam position from monitors in cylindrical particle accelerators ». Scilight 2018, no 17 (23 avril 2018) : 170003. http://dx.doi.org/10.1063/1.5037087.

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47

Muguira, L., D. Belver, V. Etxebarria, S. Varnasseri, I. Arredondo, M. del Campo, P. Echevarria et al. « A configurable electronics system for the ESS-Bilbao beam position monitors ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 721 (septembre 2013) : 50–59. http://dx.doi.org/10.1016/j.nima.2013.03.058.

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48

Liakin, D. A., S. V. Barabin, A. Yu Orlov, M. S. Saratovskikh et T. V. Kulevoy. « Electrodes for Beam Position Monitors for Fourth Generation Synchrotron Radiation Source ». Journal of Surface Investigation : X-ray, Synchrotron and Neutron Techniques 13, no 3 (mai 2019) : 511–14. http://dx.doi.org/10.1134/s1027451019030261.

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Ko, J., I. Y. Kim, C. Kim, D. T. Kim, J. Y. Huang et S. Shin. « Analysis and control of the photon beam position at PLS-II ». Journal of Synchrotron Radiation 23, no 2 (18 février 2016) : 448–54. http://dx.doi.org/10.1107/s1600577516001338.

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Résumé :
At third-generation light sources, the photon beam position stability is a critical issue for user experiments. In general, photon beam position monitors are developed to detect the real photon beam position, and the position is controlled by a feedback system in order to maintain the reference photon beam position. At Pohang Light Source II, a photon beam position stability of less than 1 µm r.m.s. was achieved for a user service period in the beamline, where the photon beam position monitor is installed. Nevertheless, a detailed analysis of the photon beam position data was necessary in order to ensure the performance of the photon beam position monitor, since it can suffer from various unknown types of noise, such as background contamination due to upstream or downstream dipole radiation, and undulator gap dependence. This paper reports the results of a start-to-end study of the photon beam position stability and a singular value decomposition analysis to confirm the reliability of the photon beam position data.
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Arndt, U. W., et M. P. Kyte. « Position-sensitive ionization chambers in the alignment of X-ray tubes and diffractometers ». Journal of Applied Crystallography 32, no 5 (1 octobre 1999) : 1024–25. http://dx.doi.org/10.1107/s0021889899008171.

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