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Mon Mar 31 13:09:33 2025
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> Test of individual 3He tubes > > The tests were done using the ATOMKI MCA and > HV: ISEG NH204M > Preamp: Mesytec MHV-16 (Unipolar IFIC) > Amp: ORTEC671 (Gain=5x0.5,SHP=6us) > Pulser: 10Hz-Clock + TC410A G&DG + BH-1 (tr=1us,tf=1ms,amp=0.7) > Spectra measured with 1024 channels > Counting time: 100s (UPC, RIKEN and ORNL 1") > 120s (ORNL 2") > Neutron source: 252Cf > PE setup: 1 inches tubes were tested on the BELEN-20 PE matrix, while for 2 inches tubes a moderator was prepared > using existing material (see attached figures). > > Attached a figure with a sample spectrum for each tube type > and a compressed file with all the measured spectra in ASCII format. > > All the tubes performed correctly. The neutron signal is well separated from the noise. > The RIKEN tubes have the highest gain. Gain in the UPC tubes is the lowest. >
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