Author: Graves, W.S.
Paper Title Page
WEPA62 Design and Commissioning of the ASU CXLS RF System 764
 
  • B.J. Cook, G.I. Babic, J.R.S. Falconer, W.S. Graves, M.R. Holl, S.P. Jachim, R.E. Larsen
    Arizona State University, Tempe, USA
 
  Funding: This work was supported in part by NSF award #1935994.
The Com­pact X-ray Light Source (CXLS) uses in­verse Comp­ton scat­ter­ing of a high in­ten­sity laser off a bright, rel­a­tivis­tic elec­tron beam to pro­duce hard x-rays. The ac­cel­er­a­tor con­sists of a pho­toin­jec­tor and three stand­ing-wave linac sec­tions, which are pow­ered by two 6-MW kly­strons op­er­at­ing at 9.3 GHz with a rep­e­ti­tion rate of 1 kHz. This paper pre­sents the de­sign and com­mis­sion­ing of the CXLS RF sys­tems con­sist­ing of both high-power RF struc­tures and low-power di­ag­nos­tics. The high-power RF sys­tem is com­prised of two solid state am­pli­fier and kly­stron mod­u­la­tor sets, var­i­ous di­rec­tional cou­plers, and three phase shifter power di­viders. The low-level sys­tem con­sists of a mas­ter os­cil­la­tor and laser phase lock, IQ mod­u­la­tors, IQ de­mod­u­la­tors, and down­con­vert­ers. We pre­sent mea­sure­ments of the low-level and high-power RF phase and am­pli­tude sta­bil­ity show­ing RMS tim­ing jit­ter in the tens of fem­tosec­onds and am­pli­tude jit­ter below 0.1% at high power.
 
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-WEPA62  
About • Received ※ 29 July 2022 — Revised ※ 03 August 2022 — Accepted ※ 06 August 2022 — Issue date ※ 19 August 2022
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WEPA64 Design and Commissioning of the ASU CXLS Machine Protection System 770
 
  • S.P. Jachim, B.J. Cook, J.R.S. Falconer, A.J. Gardeck, W.S. Graves, M.R. Holl, R.S. Rednour, D.M. Smith, J.V. Vela
    Arizona State University, Tempe, USA
 
  Funding: This work was supported in part by NSF award #1935994.
To pro­tect against fault con­di­tions in the high-power RF trans­port and ac­cel­er­at­ing struc­tures of the Ari­zona State Uni­ver­sity (ASU) Com­pact X-Ray Light Source (CXLS), the Ma­chine Pro­tec­tion Sys­tem (MPS) ex­tin­guishes the 6.5-MW RF en­ergy sources within ap­prox­i­mately 50 ns of the fault event. In ad­di­tion, each fault is lo­cal­ized and re­ported re­motely via USB for op­er­a­tional and main­te­nance pur­poses. This paper out­lines the re­quire­ments, de­sign, and per­for­mance of the MPS ap­plied on the CXLS.
 
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-WEPA64  
About • Received ※ 13 July 2022 — Revised ※ 28 July 2022 — Accepted ※ 08 August 2022 — Issue date ※ 12 August 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)