High-precision quantameter for NAL

Journal Article · Tue Jan 01 04:00:00 EST 1974 · Nucl. Instrum. Methods, v. 114, no. 2, pp. 357-363

DOI:https://doi.org/10.1016/0029-554X(74)90555-2· OSTI ID:4337284

Harris, F; Yount, D

BS>Specifications and test data are given for a high-precision ionization quantameter to be used at NAL. The gain per GeV is expected to be independent of photon beam energy from 1 to 1000 GeV and to be independent of beam intensity for any practical photon flux that can be produced at NAL during a uniform spill of 1 s duration. Measurements of the quantameter gain with incident electrons at SLAC yield (416.0 plus or minus 0.8) ions/GeV at 10 GeV and (416.1 plus or minus 0.8) ions/GeV at 19.7 GeV for a hydrogen filling, corrected to a standard pressure of 30.00'' Hg and temperature of 300 deg K. The gain is independent of intensity up to about 3 x 10/sup 7/ electrons per cm/sup 2/ per 1.5 mu s pulse at 10 GeV, and it varies with beam centering by less than 0.1% over a 20-cm diameter. Concurrent tests of a new SLAC quantameter yield (426.2 plus or minus 0.8) ions/GeV at 10 GeV and (426.1 plus or minus 0.8) ions/GeV at 19.7 GeV. The errors given are calculated from fluctuations in various series of integrations; the systematic uncertainties are estimated to be plus or minus 1.4 ions/GeV at each point. (auth)

• Research Organization: Univ. of Hawaii, Honolulu
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-016439
• OSTI ID: 4337284
• Journal Information: Nucl. Instrum. Methods, v. 114, no. 2, pp. 357-363, Journal Name: Nucl. Instrum. Methods, v. 114, no. 2, pp. 357-363; ISSN NUIMA
• Country of Publication: Country unknown/Code not available
• Language: English

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