2n Detector efficiency test

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Cf-252 TOF calibration

File:CF 252 TOF calibr.pdf

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).

File:Technique1.pdf

One more stage of the efficiency procedure measurements with improved BKG studying. Old design of the neutron detector (w/o PMT holders).

File:Technique1 1.pdf

New detector design

Final procedure with the CFD threshold adjusted. Dr. Dale's design of the PMT holders.

File:Technique2 2.pdf

Here is some CFD S/N calibration curve for Det_E.

File:CFD calibration DetE.pdf