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Conventional He gas counters are not suitable for use at eV energies since the low neutron absorption cross-section makes their detection efficiency low. Furthermore the dead times in He detectors are long and faster detectors are required to cope with the large instantaneous count rates. A new high efficiency detector has been constructed. The detector bank is centred around the incoming beam, and consist of Li doped glass scintillator segments of 60°. The saturation problems remaining in this high data rate detector were overcome by installing a deep FIFO, which quadrupled the available data register list. This was incorporated into a newly designed and copyrighted PCB.
The Vesuvio detector under construction. The glass scintillator elements, wrapped in aluminium foil can be seen at the front. The black B(4)C frame to hold the photo-multiplier tubes can be seen behind the scintillator elements.
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