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...S_He3_tube_mounting_for_attenuation_measurements.jpg |300px|thumb|none|He3 tube mounted on 2" of virgin poly for attenuation measurements ]] The He3 detector is shrouded in BorAl, in a triangular configuration with +1250V to

...S_He3_tube_mounting_for_attenuation_measurements.jpg |300px|thumb|none|He3 tube mounted on 2" of virgin poly for attenuation measurements ]] He3 tube is mounted on 2" of virgin poly to put it at rough center of californium so