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Superconducting RF Group
RHIC SRF 56 MHz Storage Cavity
The C-AD Superconducting RF Group is developing a SRF cavity to
serve as a storage cavity at RHIC. The motivation is:
- Provide a large voltage at minimal power and low cost and space
requirements (2.5 MV) at a low frequency, conservatively from single cavity
- Huge bucket
- Adiabatic capture directly from 28 MHz cavity, eliminate
the generation of satellite bunches
- Keeps ions in one bucket -reduce spill and background,
improve luminosity in the detector vertex
- Improve luminosity by allowing a shorter beta function at
IP due to reduced hourglass effect
- SRF cavities are stable
- Improve vacuum in RF sector (pressure rise)
- Somewhat lower RHIC impedance (fewer cavities)
For more information see the following:
- presentations in the February 2008 Machine
Advisory Committee:
See also report by
Nathan Towne on
stability issues of RHIC with the 56 MHz SRF cavity.
- AIP Project Launch meeting, March 26, 2008:
International External Review Committee
An International Committee reviewed the 56 MHz cavity design on January
8-9, 2009.
Presentations and other information on the review can be found at:
http://www.c-ad.bnl.gov/cavity_review/
Supplemental Material
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HOM Damper Mechanical Engineering
56 MHz Cavity Project Milestones
56 MHz Cavity Project Overall Schedule
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Welcome,
Derek Lowenstein
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Introduction,
Ilan Ben-Zvi
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Beam stability of RHIC with the 56 MHz cavity,
Mike Blaskiewicz
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Cavity Electromagnetic Design,
Xiangyun
Chang
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Fundamental - Mode Damper,
Eunmi Choi
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Fundamental and HOM Damper Designs,
Eunmi Choi
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Multipacting Studies,
Damayanti Naik
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3D Multipacting Calculations,
Jőrg
Kewisch
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Resonator Mechanical Design and Tuner Mechanical Design,
Chien Pai
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Cryogenic System,
Roberto Than
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Chemistry and Testing,
Andrew Burrill
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Answers to Committee
follow-up questions
56MHz Cavity – Fabrication Procedures
Cryomodule Assembly
Microphonics
Fundamental Damper
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RHIC A.P. Notes related to the 56 MHz SRF cavity:
C-A/AP/314 |
7/08 |
Summary
on the fundamental mode damper experiments of the 56 MHz SRF cavity
E. M. Choi, H. Hahn
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C-A/AP/315 |
7/08 |
Capacitive
fundamental power coupler and pickup for the 56 MHz SRF cavity
E. M. Choi, H. Hahn
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C-A/AP/319 |
8/08 |
Higher
Order Mode Damper Study of the 56 MHz SRF Cavity,
E.M. Choi, H. Hahn
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C-A/AP/321 |
8/08 |
Higher order model power calculation of the 56 MHz SRF cavity
E.M. Choi |
C-A/AP/331 |
10/08 |
Geometric Optimization of
the 56MHz SRF Cavity and its Frequency Table, X.
Chang, I. Ben-Zvi
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C-A/AP/332 |
10/08 |
IBS and Expected
Luminosity Performance For RHIC Beams At Top Energy With 56 MHz SRF
Cavity,
A. Fedotov
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C-A/AP/333 |
10/08 |
RHIC Performance with 56
MHz RF and Gold Ion Beams Pre-cooled at Lower Energy ,
A. Fedotov
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C-A/AP/337 |
1/09 |
Superconducting
Storage Cavity for RHIC, I. Ben-Zvi
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C-A/AP/339 |
1/09 |
IBS and Potential
Luminosity Improvement for RHIC Operation Below Transition Energy,
A. Fedotov
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C-A/AP/341 |
1/09 |
Longitudinal
Stability Calculations, M. Blaskiewicz
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C-A/AP/342 |
1/09 |
56 MHZ Cavity
Prototype Measurements, H. Hahn, E. Choi
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C-A/AP/343 |
1/09 |
Multipacting
simulation study for 56 MHz Quarter Wave Resonator using 2D code,
D. Naik, I. Ben-Zvi
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C-A/AP/344 |
1/09 |
Cryogenic and Cryostat
System for the 56 MHZ SRF Cavity, R. Than
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