Difference between revisions of "2n Detector efficiency test"

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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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==Cf-252 TOF calibration==
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[[File:CF_252_TOF_calibr.pdf]]
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==CFD threshold adjustment w/ Cf-252 source==
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[[File:CFD1.pdf]]
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==Old detector design==
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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]]
 
[[File:technique1.pdf]]
  
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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]]
 +
 +
Some scope pictures showing DAQ timing setup.
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[[File:Scope_pic_1.png | 300 px]]
  
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[[File:Scope_pic_2.png | 300 px]]
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 +
==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.
  
[[File:technique2.pdf]]
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[[File:technique2_2.pdf]]
 +
 
 +
Here is some CFD S/N calibration curve for Det_E.
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[[File:CFD_calibration_DetE.pdf]]
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==Detector efficiency measurement vis D2 photodisintegration==
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[[File:technique_diff_xsect2.pdf]]

Latest revision as of 18:45, 28 February 2013

Cf-252 TOF calibration

File:CF 252 TOF calibr.pdf

CFD threshold adjustment w/ Cf-252 source

File:CFD1.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

Some scope pictures showing DAQ timing setup.

Scope pic 1.png

Scope pic 2.png

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

Detector efficiency measurement vis D2 photodisintegration

File:Technique diff xsect2.pdf