RF Distribution System for High Power Test of the SNS Cryomodule
Conference
·
OSTI ID:1042923
- ORNL
A four-way waveguide RF power distribution system for testing the Spallation Neutron Source (SNS) multi-cavity cryomodule to investigate the collective behavior has been developed. A single klystron operating at 805MHz for 1.3 msec at 60Hz powers the 4-way waveguide splitter to deliver up to 400 kW to individual cavities. Each cavity is fed through a combination of waveguide splitters and vector modulators (VM) to provide independent magnitude and phase controls. The waveguide vector modulator consists of two quadrature hybrids and two motorized waveguide phase shifters. The phase shifters and the assembled waveguide vector modulators were individually tested and characterized for low power and high RF power in the SNS RF test facility. Precise calibrations of magnitude and phase were performed to generate the look up tables (LUTs) to provide operational references during the cryomodule test. An I-Q demodulator module was developed and utilized to measure relative phases in pulsed high RF power operation. PLC units were developed for mechanical control of the phase shifters. Initial low/high power measurements were made using LabVIEW. An operation algorithm has been implemented into EPICS control for the cryomodule test stand.
- Research Organization:
- Oak Ridge National Laboratory (ORNL); Spallation Neutron Source
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1042923
- Country of Publication:
- United States
- Language:
- English
Similar Records
HIGH POWER RF DISTRIBUTION AND CONTROL FOR MULTI-CAVITY CRYOMODULE TESTING
A 100 MV cryomodule for CW operation
Low Level RF System for Jefferson Lab Cryomodule Test Facility
Conference
·
Fri Dec 31 23:00:00 EST 2010
·
OSTI ID:1185317
A 100 MV cryomodule for CW operation
Conference
·
Sun Jul 10 00:00:00 EDT 2005
·
OSTI ID:876019
Low Level RF System for Jefferson Lab Cryomodule Test Facility
Conference
·
Thu May 01 00:00:00 EDT 2003
·
OSTI ID:811226