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Title: Operation of the 56 MHz Superconducting RF Cavity in RHIC with Higher Order Mode Damper

Abstract

A 56 MHz superconducting RF cavity was designed and installed in the Relativistic Heavy Ion Collider (RHIC). It is the first superconducting quarter wave resonator (QWR) operating in a high-energy storage ring. We discuss herein the cavity operation with Au+Au collisions, and with asymmetrical Au+He3 collisions. The cavity is a storage cavity, meaning that it becomes active only at the energy of experiment, after the acceleration cycle is completed. With the cavity at 300 kV, an improvement in luminosity was detected from direct measurements, and the bunch length has been reduced. The uniqueness of the QWR demands an innovative design of the higher order mode dampers with high-pass filters, and a distinctive fundamental mode damper that enables the cavity to be bypassed during the acceleration stage.

Authors:
 [1]; ORCiD logo [2];  [2];  [1];  [1];  [1];  [1];  [1];  [1]
  1. RIKEN BNL
  2. SUNY, Stony Brook
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1457540
Report Number(s):
arXiv:1805.01531; FERMILAB-PUB-18-175-TD
1671835
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Wu, Q., Belomestnykh, S., Ben-Zvi, I., Blaskiewicz, M., Hayes, T., Mernick, K., Severino, F., Smith, K., and Zaltsman, A.. Operation of the 56 MHz Superconducting RF Cavity in RHIC with Higher Order Mode Damper. United States: N. p., 2018. Web.
Wu, Q., Belomestnykh, S., Ben-Zvi, I., Blaskiewicz, M., Hayes, T., Mernick, K., Severino, F., Smith, K., & Zaltsman, A.. Operation of the 56 MHz Superconducting RF Cavity in RHIC with Higher Order Mode Damper. United States.
Wu, Q., Belomestnykh, S., Ben-Zvi, I., Blaskiewicz, M., Hayes, T., Mernick, K., Severino, F., Smith, K., and Zaltsman, A.. Thu . "Operation of the 56 MHz Superconducting RF Cavity in RHIC with Higher Order Mode Damper". United States. doi:. https://www.osti.gov/servlets/purl/1457540.
@article{osti_1457540,
title = {Operation of the 56 MHz Superconducting RF Cavity in RHIC with Higher Order Mode Damper},
author = {Wu, Q. and Belomestnykh, S. and Ben-Zvi, I. and Blaskiewicz, M. and Hayes, T. and Mernick, K. and Severino, F. and Smith, K. and Zaltsman, A.},
abstractNote = {A 56 MHz superconducting RF cavity was designed and installed in the Relativistic Heavy Ion Collider (RHIC). It is the first superconducting quarter wave resonator (QWR) operating in a high-energy storage ring. We discuss herein the cavity operation with Au+Au collisions, and with asymmetrical Au+He3 collisions. The cavity is a storage cavity, meaning that it becomes active only at the energy of experiment, after the acceleration cycle is completed. With the cavity at 300 kV, an improvement in luminosity was detected from direct measurements, and the bunch length has been reduced. The uniqueness of the QWR demands an innovative design of the higher order mode dampers with high-pass filters, and a distinctive fundamental mode damper that enables the cavity to be bypassed during the acceleration stage.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2018},
month = {Thu May 03 00:00:00 EDT 2018}
}