Difference between revisions of "2n Detector efficiency test"
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| + | ==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). | 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). | ||
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[[File:technique1_1.pdf]] | [[File:technique1_1.pdf]] | ||
| − | + | ==New detector design== | |
Final procedure with the CFD threshold adjusted. Dr. Dale's design of the PMT holders. | Final procedure with the CFD threshold adjusted. Dr. Dale's design of the PMT holders. | ||
Revision as of 23:32, 24 September 2012
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).
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.