Phase loop bandwidth measurements on the advanced photon source 352 MHz rf systems

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Phase loop bandwidth tests were performed on the Advanced Photon Source storage ring 352-MHz rf systems. These measurements were made using the HP3563A Control Systems Analyzer, with the rf systems running at 30 kilowatts into each of the storage ring cavities, without stored beam. An electronic phase shifter was used to inject approximately 14 degrees of stimulated phase shift into the low-level rf system, which produced measureable response voltage in the feedback loops without upsetting normal rf system operation. With the PID (proportional-integral-differential) amplifier settings at the values used during accelerator operation, the measurement data revealed that the 3-dB response ... continued below

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4 p.

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Horan, D.; Nassiri, A. & Schwartz, C. August 1, 1997.

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Phase loop bandwidth tests were performed on the Advanced Photon Source storage ring 352-MHz rf systems. These measurements were made using the HP3563A Control Systems Analyzer, with the rf systems running at 30 kilowatts into each of the storage ring cavities, without stored beam. An electronic phase shifter was used to inject approximately 14 degrees of stimulated phase shift into the low-level rf system, which produced measureable response voltage in the feedback loops without upsetting normal rf system operation. With the PID (proportional-integral-differential) amplifier settings at the values used during accelerator operation, the measurement data revealed that the 3-dB response for the cavity sum and klystron power-phase loops is approximately 7 kHz and 45 kHz, respectively, with the cavities the primary bandwidth-limiting factor in the cavity-sum loop. Data were taken at various PID settings until the loops became unstable. Crosstalk between the two phase loops was measured.

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4 p.

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INIS; OSTI as DE97053320

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  • 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997

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  • Other: DE97053320
  • Report No.: ANL/ASD/CP--92276
  • Report No.: CONF-970503--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 543617
  • Archival Resource Key: ark:/67531/metadc694851

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  • August 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 16, 2015, 5:15 p.m.

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Horan, D.; Nassiri, A. & Schwartz, C. Phase loop bandwidth measurements on the advanced photon source 352 MHz rf systems, article, August 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc694851/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.