The first operation of 56 MHz SRF cavity in RHIC

Conference · Sun May 03 00:00:00 EDT 2015

OSTI ID:1183863

Wu, Q. ^[1]; Belomestnykh, S. ^[1]; Ben-Zvi, I. ^[1]; Blaskiewicz, M. ^[1]; DeSanto, L. ^[1]; Goldberg, D. ^[1]; Harvey, M. ^[1]; Hayes, T. ^[1]; McIntyre, G. ^[1]; Mernick, K. ^[1]; Orfin, P. ^[1]; Seberg, S. ^[1]; Severino, F. ^[1]; Smith, K. ^[1]; Than, R. ^[1]; Zaltsman, A. ^[1]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States)

A 56 MHz superconducting RF cavity has been designed, fabricated and installed in the Relativistic Heavy Ion Collider (RHIC). The cavity operates at 4.4 K with a “quiet helium source” to isolate the cavity from environmental acoustic noise. The cavity is a beam driven quarter wave resonator. It is detuned and damped during injection and acceleration cycles and is brought to operation only at store energy. For a first test operation, the cavity voltage was stabilized at 300 kV with full beam current. Within both Au + Au and asymmetrical Au + He3 collisions, luminosity improvement was detected from direct measurement, and the hourglass effect was reduced. One higher order mode (HOM) coupler was installed on the cavity. We report in this paper on our measurement of a broadband HOM spectrum excited by the Au beam.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: SC00112704
• OSTI ID: 1183863
• Report Number(s): BNL-107439-2015-CP; R&D Project: KBCH139; KB0202011; TRN: US1500224
• Resource Relation: Conference: 6th International Particle Accelerator Conference (IPAC’15), Richmond, VA (United States), 3-8 May 2015
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BROOKHAVEN RHIC
MHZ RANGE 01-100
OPERATION
HELIUM 3 BEAMS
GOLD 197 BEAMS
BEAM LUMINOSITY
SUPERCONDUCTING CAVITY RESONATORS
RF SYSTEMS
TEMPERATURE RANGE 0000-0013 K
RELATIVISTIC HEAVY ION COLLIDER