Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper
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 a design of the cavity and its key components and the cavity operation...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-10-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.22.102001 |
| _version_ | 1818996813972111360 |
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| author | Qiong Wu Sergey Belomestnykh Ilan Ben-Zvi Michael M. Blaskiewicz Thomas Hayes Kevin Mernick Freddy Severino Kevin Smith Alex Zaltsman |
| author_facet | Qiong Wu Sergey Belomestnykh Ilan Ben-Zvi Michael M. Blaskiewicz Thomas Hayes Kevin Mernick Freddy Severino Kevin Smith Alex Zaltsman |
| author_sort | Qiong Wu |
| collection | DOAJ |
| description | 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 a design of the cavity and its key components and the cavity operation with Au+Au collisions, and with asymmetrical Au+^{3}He collisions. The cavity is a storage cavity, meaning that it becomes active only at the energy of the experiment, after the acceleration cycle is completed. Without beam, the cavity reached 1.93 MV and a Q_{0} of 3.0×10^{8} after helium conditioning. The cavity voltage was limited at 300 kV with beam operation due to heating in the Higher Order Mode (HOM) coupler. With the cavity operating at 300 kV, an improvement in luminosity was detected from direct measurements, and the bunch length has been reduced. The uniqueness of the QWR necessitated development of 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 transparent to the beam during acceleration. |
| first_indexed | 2024-12-20T21:35:43Z |
| format | Article |
| id | doaj.art-b244939f26b640c88f660a54cc0e6e0a |
| institution | Directory Open Access Journal |
| issn | 2469-9888 |
| language | English |
| last_indexed | 2024-12-20T21:35:43Z |
| publishDate | 2019-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj.art-b244939f26b640c88f660a54cc0e6e0a2022-12-21T19:25:57ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882019-10-01221010200110.1103/PhysRevAccelBeams.22.102001Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damperQiong WuSergey BelomestnykhIlan Ben-ZviMichael M. BlaskiewiczThomas HayesKevin MernickFreddy SeverinoKevin SmithAlex ZaltsmanA 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 a design of the cavity and its key components and the cavity operation with Au+Au collisions, and with asymmetrical Au+^{3}He collisions. The cavity is a storage cavity, meaning that it becomes active only at the energy of the experiment, after the acceleration cycle is completed. Without beam, the cavity reached 1.93 MV and a Q_{0} of 3.0×10^{8} after helium conditioning. The cavity voltage was limited at 300 kV with beam operation due to heating in the Higher Order Mode (HOM) coupler. With the cavity operating at 300 kV, an improvement in luminosity was detected from direct measurements, and the bunch length has been reduced. The uniqueness of the QWR necessitated development of 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 transparent to the beam during acceleration.http://doi.org/10.1103/PhysRevAccelBeams.22.102001 |
| spellingShingle | Qiong Wu Sergey Belomestnykh Ilan Ben-Zvi Michael M. Blaskiewicz Thomas Hayes Kevin Mernick Freddy Severino Kevin Smith Alex Zaltsman Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper Physical Review Accelerators and Beams |
| title | Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper |
| title_full | Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper |
| title_fullStr | Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper |
| title_full_unstemmed | Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper |
| title_short | Operation of the 56 MHz superconducting rf cavity in RHIC with higher order mode damper |
| title_sort | operation of the 56 mhz superconducting rf cavity in rhic with higher order mode damper |
| url | http://doi.org/10.1103/PhysRevAccelBeams.22.102001 |
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