Geiger mode calorimeter for PEP-4 - The PEP-4 TPC collaboration

Journal Article · Tue Feb 01 00:00:00 EST 1983 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/TNS.1983.4332231· OSTI ID:5990469

Aihara, H; Alston-Garnjost, M; Badtke, D H; Bakken, J A; Barbaro-Galtieri, A; Barnes, A V; Barnett, B A; Blumenfeld, B

The PEP-4 hexagonal barrel calorimeter, with lead-laminate layers and 5x10mm/sup 2/ Geiger-mode discharge cells, has demonstrated excellent stability and uniformity in operation. The use of projective geometry in half degree-wide cathode strips at + or - 60 degrees to the sense wire channels provides excellent spatial resolution and reconstruction capability. The electronic noise-to-signal ratio without preamplification is sufficiently low that individual 50 pC Geiger discharges are accurately measured and used for energy calibration. Measurements made at 14.5 GeV e + or - beam energy have provided preliminary spectra of Bhabhas and of photon-photon invariant mass. The latter show that ..pi.. /SUP o/ 's can be reconstructed.

• Research Organization: Department of Physics, University of Tokyo, Tokyo
• OSTI ID: 5990469
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Vol. 30:1
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALORIMETRIC DOSEMETERS
OPERATION
BHABHA SCATTERING
CALIBRATION
GEIGER-MUELLER COUNTERS
GEV RANGE 01-10
PEP STORAGE RINGS
PHOTONS
PROJECTION SPARK CHAMBERS
SIGNAL-TO-NOISE RATIO
SPATIAL RESOLUTION
SPECTRA
STABILITY
DOSEMETERS
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY RANGE
GAS TRACK DETECTORS
GEV RANGE
MASSLESS PARTICLES
MEASURING INSTRUMENTS
RADIATION DETECTORS
RESOLUTION
SCATTERING
SPARK CHAMBERS
STORAGE RINGS
440104* - Radiation Instrumentation- High Energy Physics Instrumentation