Electro-optical modulators in particle detectors

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1145447· OSTI ID:69599

Tsang, T; Radeka, V ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)

Results of an investigation to minimize the local electronics in particle detectors using electro-optical intensity modulators are reported. The electrical charge signals from a particle detector are first applied to a low noise electronic charge-sensitive preamplifier and the resulting signal charges are converted into optical signals using an integrated Ti:LiNbO{sub 3} Mach--Zehnder interferometric optical modulator. By driving the optical modulator with a low noise diode-pumped Nd:YAG laser at a wavelength of 1.3 {mu}m and detecting the output signals using a fast pulse shaping technique, the charge output of a particle detector can be measured at high rates with high accuracy up to 3 decades of dynamic range. The performance characteristics of such a detector signal transfer scheme, using first a single channel optical modulator and then a 16-channel integrated optical modulator array, is reported. Using the charge output from a multiwire proportional chamber, this electrical charge to optical signal transfer scheme is compared to the conventional particle detection technique. Effects of radiation dose on the optical modulator are also presented. Finally, the implication of using such an optical technique is discussed. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• DOE Contract Number: AC35-89ER40486; AC02-76CH00016
• OSTI ID: 69599
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 7 Vol. 66; ISSN RSINAK; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
DATA ACQUISITION SYSTEMS
ELECTRO-OPTICAL EFFECTS
FIBER OPTICS
INTEGRATED CIRCUITS
MODULATION
PHYSICAL RADIATION EFFECTS
RADIATION DETECTORS