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Title: Phase control and intra-pulse phase compensation of the Advanced Photon Source (APS) linear accelerator

Abstract

Rf power for the APS linear accelerator is provided by five klystrons, each of which feeds one linac ``sector,`` containing accelerating structures and SLED cavities. A VXI-based subsystem measures the phase of each sector of the linac with respect to a thermally stabilized reference line. The resulting information is used to control a linearized varactor phase shifter. Error correction is done by software, using operator-controllable parameters. A second phase shifter provides an intra-pulse correction to the phase of the klystron drive pulse. When the intra-pulse correction is applied, the resulting phase is flat to within 0.5{degrees} after 2.5 {mu}sec. A second correction, made after the PSK trigger to the SLED and during the filling of the accelerating structures, resulted in an energy gain of 5 MeV from a single sector.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
93546
Report Number(s):
ANL/ASD/CP-84993; CONF-950512-270
ON: DE95013728; TRN: 95:018466
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 16. Institute of Electrical and Electronic Engineers (IEEE) particle accelerator conference, Dallas, TX (United States), 1-5 May 1995; Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; LINEAR ACCELERATORS; PHASE STABILITY; CONTROL SYSTEMS; ADVANCED PHOTON SOURCE; KLYSTRONS; RF SYSTEMS

Citation Formats

Grelick, A E, Arnold, N, Ko, K, Sereno, N, and White, M. Phase control and intra-pulse phase compensation of the Advanced Photon Source (APS) linear accelerator. United States: N. p., 1995. Web.
Grelick, A E, Arnold, N, Ko, K, Sereno, N, & White, M. Phase control and intra-pulse phase compensation of the Advanced Photon Source (APS) linear accelerator. United States.
Grelick, A E, Arnold, N, Ko, K, Sereno, N, and White, M. 1995. "Phase control and intra-pulse phase compensation of the Advanced Photon Source (APS) linear accelerator". United States. https://www.osti.gov/servlets/purl/93546.
@article{osti_93546,
title = {Phase control and intra-pulse phase compensation of the Advanced Photon Source (APS) linear accelerator},
author = {Grelick, A E and Arnold, N and Ko, K and Sereno, N and White, M},
abstractNote = {Rf power for the APS linear accelerator is provided by five klystrons, each of which feeds one linac ``sector,`` containing accelerating structures and SLED cavities. A VXI-based subsystem measures the phase of each sector of the linac with respect to a thermally stabilized reference line. The resulting information is used to control a linearized varactor phase shifter. Error correction is done by software, using operator-controllable parameters. A second phase shifter provides an intra-pulse correction to the phase of the klystron drive pulse. When the intra-pulse correction is applied, the resulting phase is flat to within 0.5{degrees} after 2.5 {mu}sec. A second correction, made after the PSK trigger to the SLED and during the filling of the accelerating structures, resulted in an energy gain of 5 MeV from a single sector.},
doi = {},
url = {https://www.osti.gov/biblio/93546}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 1995},
month = {Sat Jul 01 00:00:00 EDT 1995}
}

Conference:
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