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Title: Performance of a Nanometer Resolution BPM System

Abstract

International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on variable-length struts which allow movement in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a calibration algorithm which is immune to beam jitter. To date, we have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of +/- 20 microns. We report on the progress of these ongoing tests.

Authors:
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Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
902738
Report Number(s):
SLAC-PUB-12483
TRN: US0702986
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Prepared for European Particle Accelerator Conference (EPAC 06), Edinburgh, Scotland, 26-30 Jun 2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; ALGORITHMS; ALIGNMENT; BEAM POSITION; CALIBRATION; DESIGN; LINEAR COLLIDERS; MONITORS; PERFORMANCE; RESOLUTION; STABILITY; TESTING; TRIPLETS; Accelerators,ACCPHY

Citation Formats

Walston, S., Chung, C., Fitsos, P., Gronberg, J., /LLNL, Livermore, Meller, R., /Cornell U., LEPP, Vogel, V., /DESY, Hayano, H., Honda, Y., Terunuma, N., Urakawa, J., /KEK, Tsukuba, Kolomensky, Y., Orimoto, T., /LBL, Berkeley, Boogert, S., /Royal Holloway, U. of London, Frisch, J., May, J., McCormick, D., Ross, M., Smith, S., Smith, T., White, G., /Oxford U. /SLAC, Slater, M., and /Cambridge U. /University Coll. London. Performance of a Nanometer Resolution BPM System. United States: N. p., 2007. Web.
Walston, S., Chung, C., Fitsos, P., Gronberg, J., /LLNL, Livermore, Meller, R., /Cornell U., LEPP, Vogel, V., /DESY, Hayano, H., Honda, Y., Terunuma, N., Urakawa, J., /KEK, Tsukuba, Kolomensky, Y., Orimoto, T., /LBL, Berkeley, Boogert, S., /Royal Holloway, U. of London, Frisch, J., May, J., McCormick, D., Ross, M., Smith, S., Smith, T., White, G., /Oxford U. /SLAC, Slater, M., & /Cambridge U. /University Coll. London. Performance of a Nanometer Resolution BPM System. United States.
Walston, S., Chung, C., Fitsos, P., Gronberg, J., /LLNL, Livermore, Meller, R., /Cornell U., LEPP, Vogel, V., /DESY, Hayano, H., Honda, Y., Terunuma, N., Urakawa, J., /KEK, Tsukuba, Kolomensky, Y., Orimoto, T., /LBL, Berkeley, Boogert, S., /Royal Holloway, U. of London, Frisch, J., May, J., McCormick, D., Ross, M., Smith, S., Smith, T., White, G., /Oxford U. /SLAC, Slater, M., and /Cambridge U. /University Coll. London. Tue . "Performance of a Nanometer Resolution BPM System". United States. doi:. https://www.osti.gov/servlets/purl/902738.
@article{osti_902738,
title = {Performance of a Nanometer Resolution BPM System},
author = {Walston, S. and Chung, C. and Fitsos, P. and Gronberg, J. and /LLNL, Livermore and Meller, R. and /Cornell U., LEPP and Vogel, V. and /DESY and Hayano, H. and Honda, Y. and Terunuma, N. and Urakawa, J. and /KEK, Tsukuba and Kolomensky, Y. and Orimoto, T. and /LBL, Berkeley and Boogert, S. and /Royal Holloway, U. of London and Frisch, J. and May, J. and McCormick, D. and Ross, M. and Smith, S. and Smith, T. and White, G. and /Oxford U. /SLAC and Slater, M. and /Cambridge U. /University Coll. London},
abstractNote = {International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on variable-length struts which allow movement in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a calibration algorithm which is immune to beam jitter. To date, we have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of +/- 20 microns. We report on the progress of these ongoing tests.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 24 00:00:00 EDT 2007},
month = {Tue Apr 24 00:00:00 EDT 2007}
}

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  • International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. it is important to the ongoing ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that an RF cavity BPM with modern waveform processing could provide a position measurement resolution of less than one nanometer. Such a system could form the basis of the desired beam-based stability measurement, as well as be used for other specialized purposes. They have developed a high resolution RF cavity BPM and associated electronics.more » A triplet comprised of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on six variable-length struts which can be used to move the BPMs in position and angle. they have developed novel methods for extracting the position and tilt information from the BPM signals including a robust calibration algorithm which is immune to beam jitter. To date, they have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of {+-} 20 {micro}m. They report on the progress of these ongoing tests.« less
  • International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Testmore » Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on variable-length struts which allow movement in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a calibration algorithm which is immune to beam jitter. To date, we have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of +/- 20 microns. We report on the progress of these ongoing tests.« less
  • A new type of high resolution beam position monitor called the damped slot resonator rf BPM has been installed at the focal point of the FFTB. It is comprised of a cylindrical resonant cavity with a tuned choke joint at the TM{sub 110} resonances. The BPM has a large dynamic range from the nm to mm range with a minimum resolution of 1 nm. We report on the rf cavity cold tests performance, processing electronics design, and some experimental results obtained in obtained in the high energy electron beam line.
  • A beam position monitor (BPM) upgrade at the KEK Accelerator Test Facility (ATF) damping ring has been accomplished in its first stage, carried out by a KEK/FNAL/SLAC collaboration under the umbrella of the global ILC R&D effort. The upgrade consists of a high resolution, high reproducibility read-out system, based on analog and digital downconversion techniques, digital signal processing, and also tests a new automatic gain error correction schema. The technical concept and realization, as well as preliminary results of beam studies are presented.