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Title: Low-Level RF Control of Microphonics in Superconducting Spoke-Loaded Cavities

Abstract

This paper presents the results of cw RF frequency control and RF phase-stabilization experiments performed with a piezoelectric fast tuner mechanically coupled to a superconducting, 345 MHz, Ë = 0.5 triple-spoke-loaded cavity operating at 4.2K. The piezoelectric fast tuner damped low-frequency microphonic-noise by an order of magnitude. Two methods of RF phase-stabilization were characterized: overcoupling with negative phase feedback, and also fast mechanical tuner feedback. The Ë = 0.5 triple-spoke-loaded cavity RF field amplitude and phase errors were controlled to ±0.5% and ±30 respectively.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson Lab National Accelerator Facility
Sponsoring Org.:
USDOE
OSTI Identifier:
955805
Report Number(s):
JLAB-ACC-07-773; DOE/OR/23177-0552
TRN: US1004749
DOE Contract Number:  
AC05-060R23177
Resource Type:
Conference
Resource Relation:
Conference: Paper compiled for SRF 2007
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; AMPLITUDES; CAVITIES; FEEDBACK; FREQUENCY CONTROL; RF SYSTEMS

Citation Formats

Conway, Z A, Kelly, M P, Sharamentov, S I, Shepard, K W, Davis, G, Delayen, Jean, and Doolittle, Lawrence. Low-Level RF Control of Microphonics in Superconducting Spoke-Loaded Cavities. United States: N. p., 2007. Web.
Conway, Z A, Kelly, M P, Sharamentov, S I, Shepard, K W, Davis, G, Delayen, Jean, & Doolittle, Lawrence. Low-Level RF Control of Microphonics in Superconducting Spoke-Loaded Cavities. United States.
Conway, Z A, Kelly, M P, Sharamentov, S I, Shepard, K W, Davis, G, Delayen, Jean, and Doolittle, Lawrence. Mon . "Low-Level RF Control of Microphonics in Superconducting Spoke-Loaded Cavities". United States. https://www.osti.gov/servlets/purl/955805.
@article{osti_955805,
title = {Low-Level RF Control of Microphonics in Superconducting Spoke-Loaded Cavities},
author = {Conway, Z A and Kelly, M P and Sharamentov, S I and Shepard, K W and Davis, G and Delayen, Jean and Doolittle, Lawrence},
abstractNote = {This paper presents the results of cw RF frequency control and RF phase-stabilization experiments performed with a piezoelectric fast tuner mechanically coupled to a superconducting, 345 MHz, Ë = 0.5 triple-spoke-loaded cavity operating at 4.2K. The piezoelectric fast tuner damped low-frequency microphonic-noise by an order of magnitude. Two methods of RF phase-stabilization were characterized: overcoupling with negative phase feedback, and also fast mechanical tuner feedback. The Ë = 0.5 triple-spoke-loaded cavity RF field amplitude and phase errors were controlled to ±0.5% and ±30 respectively.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {10}
}

Conference:
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