ARF1 Frequency and Amplitude Curve Calibration

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ARF1 was calibrated and checked on 4/18/01. The technique used was to set the start/stop timers (A:R1LLT1 and A:R1LLT2) for duration of 200 msec. Driving the cavities for longer than 200 msec at full voltage could put some stress on the Hipotronics anode supply. The Camac curve generator card was substituted with a precision DC voltage source. Data for both amplitude and frequency were taken with the DC source. A HP 8563A spectrum analyzer in zero span with resolution bandwidth of 1 MHz at a center frequency of 52.818 MHz was used to take the amplitude data. The dynamic curve ... continued below

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3 pages

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Pasquinelli, Ralph J. April 20, 2001.

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ARF1 was calibrated and checked on 4/18/01. The technique used was to set the start/stop timers (A:R1LLT1 and A:R1LLT2) for duration of 200 msec. Driving the cavities for longer than 200 msec at full voltage could put some stress on the Hipotronics anode supply. The Camac curve generator card was substituted with a precision DC voltage source. Data for both amplitude and frequency were taken with the DC source. A HP 8563A spectrum analyzer in zero span with resolution bandwidth of 1 MHz at a center frequency of 52.818 MHz was used to take the amplitude data. The dynamic curve was a triangle waveform provided by a triggered HP3213A function generator. Frequency was measured on the Fluke frequency counter mounted in the rack in AP50 (with the high level RF off). The attached data and graph contain the current calibration. ARF1-1 is slightly lower voltage than ARF1-2, but well within spec. The calibration was made with the Anode supply at 9 Kvolts, the bend busses were off due to an access that was in progress. Due to the unregulated Anode supply, the voltage levels observed may be slightly higher than with bend busses on. The dynamic performance with the triangle waveform looks correct. The peak voltages measured for ARF1-1 and ARF1-2 were 27.1 KV and 32.9 KV respectively. The calibration for the fanback is 22 Kvolts per volt for ARF1-1&2, and 66 Kvolts per volt for ARF1 Sum. ARF1 has historically run with a flat top voltage duration of 160 msec. The current curve generator has lengthened that time considerably. The curve generator should take full advantage of the 65 dB dynamic range measured.

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3 pages

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  • Report No.: FERMILAB-PBAR-NOTE-659
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/984575 | External Link
  • Office of Scientific & Technical Information Report Number: 984575
  • Archival Resource Key: ark:/67531/metadc1014455

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 20, 2001

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 3, 2017, 9:27 p.m.

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Pasquinelli, Ralph J. ARF1 Frequency and Amplitude Curve Calibration, report, April 20, 2001; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1014455/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.