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

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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 ... continued below

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3 p.

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Grelick, A.E.; Arnold, N.; Ko, K.; Sereno, N. & White, M. July 1, 1995.

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Description

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.

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3 p.

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INIS; OSTI as DE95013728

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  • 16. Institute of Electrical and Electronic Engineers (IEEE) particle accelerator conference, Dallas, TX (United States), 1-5 May 1995

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  • Other: DE95013728
  • Report No.: ANL/ASD/CP--84993
  • Report No.: CONF-950512--270
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 93546
  • Archival Resource Key: ark:/67531/metadc793450

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  • July 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 14, 2016, 6:28 p.m.

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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, article, July 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc793450/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.