Fast readout algorithm for cylindrical beam position monitors providing good accuracy for particle bunches with large offsets
Abstract
Here, a simple, analytically correct algorithm is developed for calculating “pencil” relativistic beam coordinates using the signals from an ideal cylindrical particle beam position monitor (BPM) with four pickup electrodes (PUEs) of infinitesimal widths. The algorithm is then applied to simulations of realistic BPMs with finite width PUEs. Surprisingly small deviations are found. Simple empirically determined correction terms reduce the deviations even further. The algorithm is then tested with simulations for nonrelativistic beams. As an example of the data acquisition speed advantage, a FPGAbased BPM readout implementation of the new algorithm has been developed and characterized. Lastly, the algorithm is tested with BPM data from the Cornell Preinjector.
 Authors:

 Brookhaven National Lab. (BNL), Upton, NY (United States). Collider Accelerator Department
 Cornell Univ., Ithaca, NY (United States). CLASSE
 Publication Date:
 Research Org.:
 Brookhaven National Lab. (BNL), Upton, NY (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Nuclear Physics (NP) (SC26)
 OSTI Identifier:
 1431277
 Alternate Identifier(s):
 OSTI ID: 1434557
 Report Number(s):
 BNL2034222018JAAM
Journal ID: ISSN 00346748; TRN: US1802337
 Grant/Contract Number:
 SC0012704; AC0298CH10886
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Review of Scientific Instruments
 Additional Journal Information:
 Journal Volume: 89; Journal Issue: 4; Journal ID: ISSN 00346748
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 43 PARTICLE ACCELERATORS
Citation Formats
Thieberger, Peter, Gassner, D., Hulsart, R., Michnoff, R., Miller, T., Minty, M., Sorrell, Z., and Bartnik, A. Fast readout algorithm for cylindrical beam position monitors providing good accuracy for particle bunches with large offsets. United States: N. p., 2018.
Web. doi:10.1063/1.5021607.
Thieberger, Peter, Gassner, D., Hulsart, R., Michnoff, R., Miller, T., Minty, M., Sorrell, Z., & Bartnik, A. Fast readout algorithm for cylindrical beam position monitors providing good accuracy for particle bunches with large offsets. United States. doi:10.1063/1.5021607.
Thieberger, Peter, Gassner, D., Hulsart, R., Michnoff, R., Miller, T., Minty, M., Sorrell, Z., and Bartnik, A. Wed .
"Fast readout algorithm for cylindrical beam position monitors providing good accuracy for particle bunches with large offsets". United States. doi:10.1063/1.5021607. https://www.osti.gov/servlets/purl/1431277.
@article{osti_1431277,
title = {Fast readout algorithm for cylindrical beam position monitors providing good accuracy for particle bunches with large offsets},
author = {Thieberger, Peter and Gassner, D. and Hulsart, R. and Michnoff, R. and Miller, T. and Minty, M. and Sorrell, Z. and Bartnik, A.},
abstractNote = {Here, a simple, analytically correct algorithm is developed for calculating “pencil” relativistic beam coordinates using the signals from an ideal cylindrical particle beam position monitor (BPM) with four pickup electrodes (PUEs) of infinitesimal widths. The algorithm is then applied to simulations of realistic BPMs with finite width PUEs. Surprisingly small deviations are found. Simple empirically determined correction terms reduce the deviations even further. The algorithm is then tested with simulations for nonrelativistic beams. As an example of the data acquisition speed advantage, a FPGAbased BPM readout implementation of the new algorithm has been developed and characterized. Lastly, the algorithm is tested with BPM data from the Cornell Preinjector.},
doi = {10.1063/1.5021607},
journal = {Review of Scientific Instruments},
number = 4,
volume = 89,
place = {United States},
year = {2018},
month = {4}
}
Works referenced in this record:
NonIntercepting Monitor of Beam Current and Position
journal, January 1971
 Avery, Robert T.; Faltens, Andris; Hartwig, Edward C.
 IEEE Transactions on Nuclear Science, Vol. 18, Issue 3
Beam position monitoring
conference, January 1990
 Shafer, Robert E.
 Accelerator instrumentation, AIP Conference Proceedings
Record highaverage current from a highbrightness photoinjector
journal, January 2013
 Dunham, Bruce; Barley, John; Bartnik, Adam
 Applied Physics Letters, Vol. 102, Issue 3