GAMMASPHERE - Timing and signal processing aspects of the BGO Compton shield

Conference · Mon Aug 01 04:00:00 EDT 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6974569

Goulding, F S; Landis, D A; Madden, N; Maier, M; Yaver, H ^[1]

---

1. Lawrence Berkeley Lab., CA (United States)

The authors describe the design of the signal processing system and considerations involved in the timing performance of the BGO scintillator Compton shield that surrounds each of the 110 large germanium detectors used in a geodesic array covering the complete sphere surrounding the target in GAMMASPHERE. It is shown that the main timing limitation results from the statistics of photoelectron emission from the photocathode of the photomultiplier tubes (PMTs) that observe the light from the scintillators and that achieving the required timing demands triggering on the first photoelectron. The circuits to do this for a single detector assembly must be able to deal with signals from 14 PMTs associated with the 7 elements of the scintillator shield surrounding each germanium detector.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6974569
• Report Number(s): CONF-931051--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 41:4Pt1
• Country of Publication: United States
• Language: English

Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BGO DETECTORS
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
DESIGN
DETECTION
ELECTRONIC CIRCUITS
GAMMA DETECTION
GAMMA SPECTROMETERS
GE SEMICONDUCTOR DETECTORS
HEAVY ION REACTIONS
MEASURING INSTRUMENTS
NUCLEAR REACTIONS
PERFORMANCE
POSITIONING
PULSE CIRCUITS
RADIATION DETECTION
RADIATION DETECTORS
READOUT SYSTEMS
SCINTILLATION COUNTERS
SEMICONDUCTOR DETECTORS
SHIELDS
SOLID SCINTILLATION DETECTORS
SPECTROMETERS
TIMING CIRCUITS
TRIGGER CIRCUITS