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Title: High Precision Superconducting Cavity Diagnostics With Higher Order Mode Measurements

Abstract

Experiments at the FLASH facility at DESY have demonstrated that the higher order modes induced in superconducting cavities can be used to provide a variety of beam and cavity diagnostics. The axes of the modes can be determined from the beam orbit that produces minimum power in the dipole HOM modes. The phase and amplitude of the dipole modes can be used to obtain high resolution beam position information, and the phase of the monopole modes to measure the beam phase relative to the accelerator rf. For most superconducting accelerators, the existing higher order mode couplers provide the necessary signals, and the downmix and digitizing electronics are straightforward, similar to those for a conventional beam position monitor.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
899566
Report Number(s):
SLAC-PUB-12343
TRN: US0701979
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.ST Accel.Beams 9:112802,2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; ACCURACY; AMPLITUDES; BEAM POSITION; CAVITIES; DIPOLES; MONOPOLES; RESOLUTION; Accelerators,ACCPHY

Citation Formats

Molloy, S., Frisch, J., McCormick, D., May, J., Ross, M., Smith, T., /SLAC, Baboi, N., Hensler, O., Petrosian, L., /DESY, Napoly, O., Paparella, R.C., Simon, C., /Saclay, Eddy, N., Nagaitsev, S., Wendt, M., and /Fermilab. High Precision Superconducting Cavity Diagnostics With Higher Order Mode Measurements. United States: N. p., 2007. Web.
Molloy, S., Frisch, J., McCormick, D., May, J., Ross, M., Smith, T., /SLAC, Baboi, N., Hensler, O., Petrosian, L., /DESY, Napoly, O., Paparella, R.C., Simon, C., /Saclay, Eddy, N., Nagaitsev, S., Wendt, M., & /Fermilab. High Precision Superconducting Cavity Diagnostics With Higher Order Mode Measurements. United States.
Molloy, S., Frisch, J., McCormick, D., May, J., Ross, M., Smith, T., /SLAC, Baboi, N., Hensler, O., Petrosian, L., /DESY, Napoly, O., Paparella, R.C., Simon, C., /Saclay, Eddy, N., Nagaitsev, S., Wendt, M., and /Fermilab. Mon . "High Precision Superconducting Cavity Diagnostics With Higher Order Mode Measurements". United States. doi:. https://www.osti.gov/servlets/purl/899566.
@article{osti_899566,
title = {High Precision Superconducting Cavity Diagnostics With Higher Order Mode Measurements},
author = {Molloy, S. and Frisch, J. and McCormick, D. and May, J. and Ross, M. and Smith, T. and /SLAC and Baboi, N. and Hensler, O. and Petrosian, L. and /DESY and Napoly, O. and Paparella, R.C. and Simon, C. and /Saclay and Eddy, N. and Nagaitsev, S. and Wendt, M. and /Fermilab},
abstractNote = {Experiments at the FLASH facility at DESY have demonstrated that the higher order modes induced in superconducting cavities can be used to provide a variety of beam and cavity diagnostics. The axes of the modes can be determined from the beam orbit that produces minimum power in the dipole HOM modes. The phase and amplitude of the dipole modes can be used to obtain high resolution beam position information, and the phase of the monopole modes to measure the beam phase relative to the accelerator rf. For most superconducting accelerators, the existing higher order mode couplers provide the necessary signals, and the downmix and digitizing electronics are straightforward, similar to those for a conventional beam position monitor.},
doi = {},
journal = {Phys.Rev.ST Accel.Beams 9:112802,2006},
number = ,
volume = ,
place = {United States},
year = {Mon Feb 12 00:00:00 EST 2007},
month = {Mon Feb 12 00:00:00 EST 2007}
}