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Title: Low Level RF System for Jefferson Lab Cryomodule Test Facility

Abstract

The Jefferson Lab Cryomodule Test Facility (CMTF) has been upgraded to test and commission SNS and CEBAF Energy Upgrade cryomodules. Part of the upgrade was to modernize the superconducting cavity instrumentation and control. We have designed a VXI based RF control system exclusively for the production testing of superconducting cavities. The RF system can be configured to work either in Phase Locked Loop (PLL) or Self Excited Loop (SEL) mode. It can be used to drive either SNS 805 MHz or CEBAF Energy Upgrade 1497 MHz superconducting cavities and can be operated in pulsed or continuous wave (CW) mode. The base design consists of RF-analog and digital sections. The RF-analog section includes a Voltage Control Oscillator (VCO), phase detector, I&Q modulator and ''low phase shift'' limiter. The digital section controls the analog section and includes ADC, FPGA, and DAC . We will discuss the design of the RF system and how it relates to the support of cavity testing.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
811226
Report Number(s):
JLAB-ACE-03-100; DOE/ER/40150-2487
TRN: US0303132
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: PAC 2003, Seattle, WA (US), 05/12/2003--05/16/2003; Other Information: PBD: 1 May 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DESIGN; RF SYSTEMS; CRYOGENICS; TEST FACILITIES; CEBAF ACCELERATOR; SUPERCONDUCTING CAVITY RESONATORS; PERFORMANCE TESTING

Citation Formats

Plawski, Tomasz, Allison, Trent, Delayen, Jean, Hovater, J, and Powers, Thomas. Low Level RF System for Jefferson Lab Cryomodule Test Facility. United States: N. p., 2003. Web.
Plawski, Tomasz, Allison, Trent, Delayen, Jean, Hovater, J, & Powers, Thomas. Low Level RF System for Jefferson Lab Cryomodule Test Facility. United States.
Plawski, Tomasz, Allison, Trent, Delayen, Jean, Hovater, J, and Powers, Thomas. Thu . "Low Level RF System for Jefferson Lab Cryomodule Test Facility". United States. https://www.osti.gov/servlets/purl/811226.
@article{osti_811226,
title = {Low Level RF System for Jefferson Lab Cryomodule Test Facility},
author = {Plawski, Tomasz and Allison, Trent and Delayen, Jean and Hovater, J and Powers, Thomas},
abstractNote = {The Jefferson Lab Cryomodule Test Facility (CMTF) has been upgraded to test and commission SNS and CEBAF Energy Upgrade cryomodules. Part of the upgrade was to modernize the superconducting cavity instrumentation and control. We have designed a VXI based RF control system exclusively for the production testing of superconducting cavities. The RF system can be configured to work either in Phase Locked Loop (PLL) or Self Excited Loop (SEL) mode. It can be used to drive either SNS 805 MHz or CEBAF Energy Upgrade 1497 MHz superconducting cavities and can be operated in pulsed or continuous wave (CW) mode. The base design consists of RF-analog and digital sections. The RF-analog section includes a Voltage Control Oscillator (VCO), phase detector, I&Q modulator and ''low phase shift'' limiter. The digital section controls the analog section and includes ADC, FPGA, and DAC . We will discuss the design of the RF system and how it relates to the support of cavity testing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {5}
}

Conference:
Other availability
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