Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening

Conference · Mon Dec 01 00:00:00 EST 2014

OSTI ID:1189953

Rodnizki, J ^[1]; Ben Aliz, Y ^[1]; Grin, A ^[1]; Horvitz, Z ^[1]; Perry, A ^[1]; Weissman, L ^[1]; Davis, G Kirk ^[2]; Delayen, Jean R. ^[3]

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1. Soreq NRC, Yavne, Israel
2. JLAB
3. Old Dominion Universtiy

The Soreq Applied Research Accelerator Facility (SARAF) design is based on a 40 MeV 5 mA light ions superconducting RF linac. Phase-I of SARAF delivers up to 2 mA CW proton beams in an energy range of 1.5 - 4.0 MeV. The maximum beam power that we have reached is 5.7 kW. Today, the main limiting factor to reach higher ion energy and beam power is related to the HWR sensitivity to the liquid helium coolant pressure fluctuations. The HWR sensitivity to helium pressure is about 60 Hz/mbar. The cavities had been designed, a decade ago, to be soft in order to enable tuning of their novel shape. However, the cavities turned out to be too soft. In this work we found that increasing the rigidity of the cavities in the vicinity of the external drift tubes may reduce the cavity sensitivity by a factor of three. A preliminary design to increase the cavity rigidity is presented.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1189953
• Report Number(s): JLAB-ACC-14-1962; DOE/OR/23177-3409
• Resource Relation: Conference: LINAC14, 31 August-5 September 2014, Geneva, Switzerland
• Country of Publication: United States
• Language: English