Electronics and Algorithms for HOM Based Beam Diagnostics

Journal Article · Mon Nov 20 00:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2401419· OSTI ID:20894930

Frisch, Josef; McCormick, Douglas; May, Justin; Molloy, Stephen; Ross, Marc; Smith, Tonee ^[1]; Baboi, Nicoleta; Hensler, Olaf; Paparella, Rita; Petrosyan, Lyudvig ^[2]; Eddy, Nathan; Nagaitsev, Sergei ^[3]; Napoly, Olivier; Simon, Claire ^[4]

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1. Stanford Linear Accelerator Center PO Box 4349 Menlo Park CA 94309 (United States)
2. Deutsches Elektronen Synchrotron 22607 Hamburg Germany (Germany)
3. Fermi National Accelerator Laboratory, PO Box 500, Batavia IL 60510 (United States)
4. Commissariat a l'Energie Atomique Direction des Sciences de lat Matiere DAPNIA F-91191 Gif sur Yvette Cedex (France)

The signals from the Higher Order Mode (HOM) ports on superconducting cavities can be used as beam position monitors and to do survey structure alignment. A HOM-based diagnostic system has been installed to instrument both couplers on each of the 40 cryogenic accelerating structures in the DESY TTF2 Linac. The electronics uses a single stage down conversion from the 1.7 GHz HOM spectral line to a 20MHz IF which has been digitized. The electronics is based on low cost surface mount components suitable for large scale production. The analysis of the HOM data is based on Singular Value Decomposition. The response of the OM modes is calibrated using conventional BPMs.

• OSTI ID: 20894930
• Journal Information: AIP Conference Proceedings, Vol. 868, Issue 1; Conference: 12. beam instrumentation workshop, Batavia, IL (United States), 1-4 May 2006; Other Information: DOI: 10.1063/1.2401419; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ALGORITHMS
BEAM MONITORS
BEAM POSITION
DESY
GHZ RANGE 01-100
LINEAR ACCELERATORS
PARTICLE BEAMS
SUPERCONDUCTING DEVICES