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Title: Using higher order modes in superconducting accelerating cavities for beam monitoring

Abstract

Dipole modes have been shown to be successful diagnostics for the beam position in superconducting accelerating cavities at the Free Electron Laser in Hamburg (FLASH) facility at DESY. By help of downmixing electronics the signals from the two higher order mode (HOM) couplers mounted on each cavity are monitored. The calibration, based on sigular value decomposition, is more complicated than in standard position monitors. Position like signals based on this calibration are currently being in the process of being included in the control system. A second setup based on digitizing the spectrum from the HOM couplers has been used for monitoring monopole modes. The beam phase with respect to the RF has been thus monitored. The position calibration measurements and phase monitoring made at the FLASH are presented.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
924528
Report Number(s):
FERMILAB-CONF-06-512-AD
TRN: US0802909
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: Presented at 2006 Linear Accelerator Conference (LINAC 06), Knoxville, Tennessee, 21-25 Aug 2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM MONITORING; BEAM POSITION; CALIBRATION; CAVITIES; CONTROL SYSTEMS; DIPOLES; FREE ELECTRON LASERS; LINEAR ACCELERATORS; MONITORING; MONITORS; MONOPOLES; Accelerators

Citation Formats

Molloy, S., Baboi, N., Eddy, N., Frisch, J., Hendrickson, L., Hensler, O., McCormick, D., May, J., Nagaitsev, S., Napoly, O., Paparella, R.C., and /SLAC /DESY /Fermilab /DSM, DAPNIA, Saclay /KEK, Tsukuba. Using higher order modes in superconducting accelerating cavities for beam monitoring. United States: N. p., 2006. Web.
Molloy, S., Baboi, N., Eddy, N., Frisch, J., Hendrickson, L., Hensler, O., McCormick, D., May, J., Nagaitsev, S., Napoly, O., Paparella, R.C., & /SLAC /DESY /Fermilab /DSM, DAPNIA, Saclay /KEK, Tsukuba. Using higher order modes in superconducting accelerating cavities for beam monitoring. United States.
Molloy, S., Baboi, N., Eddy, N., Frisch, J., Hendrickson, L., Hensler, O., McCormick, D., May, J., Nagaitsev, S., Napoly, O., Paparella, R.C., and /SLAC /DESY /Fermilab /DSM, DAPNIA, Saclay /KEK, Tsukuba. Sun . "Using higher order modes in superconducting accelerating cavities for beam monitoring". United States. doi:. https://www.osti.gov/servlets/purl/924528.
@article{osti_924528,
title = {Using higher order modes in superconducting accelerating cavities for beam monitoring},
author = {Molloy, S. and Baboi, N. and Eddy, N. and Frisch, J. and Hendrickson, L. and Hensler, O. and McCormick, D. and May, J. and Nagaitsev, S. and Napoly, O. and Paparella, R.C. and /SLAC /DESY /Fermilab /DSM, DAPNIA, Saclay /KEK, Tsukuba},
abstractNote = {Dipole modes have been shown to be successful diagnostics for the beam position in superconducting accelerating cavities at the Free Electron Laser in Hamburg (FLASH) facility at DESY. By help of downmixing electronics the signals from the two higher order mode (HOM) couplers mounted on each cavity are monitored. The calibration, based on sigular value decomposition, is more complicated than in standard position monitors. Position like signals based on this calibration are currently being in the process of being included in the control system. A second setup based on digitizing the spectrum from the HOM couplers has been used for monitoring monopole modes. The beam phase with respect to the RF has been thus monitored. The position calibration measurements and phase monitoring made at the FLASH are presented.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
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