Observations of Long-Range and Short-Range Wakefield Effects on Electron-Beam Dynamics in TESLA-Type Superconducting RF

Conference · Tue Jan 01 00:00:00 EST 2019

OSTI ID:1573823

Lumpkin, A. H. ^[1]; Thurman-Keup, R. ^[1]; Eddy, N. ^[1]; Edstrom, D. ^[1]; Ruan, J. ^[1]

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1. Fermilab

The assessments of long-range and short-range wakefield effects in TESLA-type superconducting rf cavities at the Fermilab Accelerator Science and Technology (FAST) Facility are described. A dipolar higher-order mode (HOM) of one cavity is shown to be in near resonance with the 3-MHz micropulse repetition frequency harmonic resulting in a clear sub-macropulse centroid oscillation of 100 kHz. In the short-range wakefield measurements, a head-tail transverse kick of ~100 µm is seen in the streak camera images with 500 pC/b and offsets of ~2 mm. A numerical model for the TESLA-type cavity is consistent with these latter results.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1573823
• Report Number(s): FERMILAB-CONF-19-466-AD; oai:inspirehep.net:1763518
• Resource Relation: Conference: 8th International Beam Instrumentation Conference, Malmo, Sweden, 09/08-09/12/2019
• Country of Publication: United States
• Language: English

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