Difference between revisions of "2n Detector efficiency test"
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==Detector efficiency measurement vis D2 photodisintegration== | ==Detector efficiency measurement vis D2 photodisintegration== | ||
| − | [[File: | + | [[File:technique_diff_xsect2.pdf]] |
Latest revision as of 18:45, 28 February 2013
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.