Difference between revisions of "2n Detector efficiency test"
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[[File:CF_252_TOF_calibr.pdf]] | [[File:CF_252_TOF_calibr.pdf]] | ||
| − | ==CFD threshold adjustment== | + | ==CFD threshold adjustment w/ Cf-252 source== |
[[File:CFD1.pdf]] | [[File:CFD1.pdf]] | ||
Revision as of 23:44, 24 September 2012
Cf-252 TOF calibration
CFD threshold adjustment w/ Cf-252 source
Old detector design
This is a technique for efficiency test of the neutron detector used in the 2n correlation experiment. The neutron source was Cf-252 and fission trigger was made out of the NaI(Tl) detector with calibrated ADC and known spectrum of Cf-252 neutrons and photons. Old design of the neutron detector (w/o PMT holders).
One more stage of the efficiency procedure measurements with improved BKG studying. Old design of the neutron detector (w/o PMT holders).
Some scope pictures showing DAQ timing setup.
New detector design
Final procedure with the CFD threshold adjusted. Dr. Dale's design of the PMT holders.
Here is some CFD S/N calibration curve for Det_E.