Diagnostics Upgrades for Investigations of HOM Effects in TESLA-type SCRF Cavities

Conference · Wed Aug 23 00:00:00 EDT 2017

OSTI ID:1413089

Lumpkin, A. H. ^[1]; Edstrom Jr., D.; Ruan, J. ^[1]; Thurman-Keup, R. ^[1]; Shin, Y. ^[1]; Prieto, P. ^[1]; Eddy, N. ^[1]; Carlsten, B. E. ^[2]

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1. Fermilab
2. Los Alamos

We describe the upgrades to diagnostic capabilities on the Fermilab Accelerator Science and Technology (FAST) electron linear accelerator that will allow investigations of the effects of high-order modes (HOMs) in SCRF cavities on macropulse-average beam quality. We examine the dipole modes in the first pass-band generally observed in the 1.6-1.9 GHz regime for TESLA-type SCRF cavities due to uniform transverse beam offsets of the electron beam. Such cavities are the basis of the accelerators such as the European XFEL and the proposed MaRIE XFEL facility. Preliminary HOM detector data, prototype BPM test data, and first framing camera OTR data with ~20- micron spatial resolution at 250 pC per bunch will be presented.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1413089
• Report Number(s): FERMILAB-CONF-17-356-AD; 1642363
• Country of Publication: United States
• Language: English