Neutron bang time detector based on a light pipe.
A neutron bang time detector consisting of a scintillator, light pipe, photomultiplier tube (PMT), and high-bandwidth oscilloscope has been implemented on the 60-beam, 30 kJ OMEGA Laser Facility at the University of Rochester's Laboratory for Laser Energetics. Light from the scintillator, located 23 cm from the target, is transmitted from the target bay through a 9.6-m-long, 2 in. diameter polished stainless steel pipe to the PMT. The PMT signal is recorded by two channels of a 6 GHz, 10 GSs Tektronix 6604 oscilloscope. The OMEGA optical fiducial pulse train is recorded on the third oscilloscope channel using a fast photodiode to provide the timing reference to the laser. This bang time detector is absolutely temporally calibrated and has been demonstrated to measure the bang time for neutron yields above 1x10(9) with an accuracy of better than 25 ps.
Glebov
V Yu
VY
Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA. vgle@lle.rochester.edu
Moran
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Stoeckl
C
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Sangster
T C
TC
Cruz
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