Difference between revisions of "05-3-2017"

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[[2nCor_44#Run_Plan |  go_back]]
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[[05-2-2017| Yesterday's run list]]
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=Configuration=
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'''The He-3 detector output from the spec amp to the ADC had the wrong polarity'''
 
'''The He-3 detector output from the spec amp to the ADC had the wrong polarity'''
  
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=run list=
 
 
He-3 timing is in patch panel 223A16, & energy is 223A17.
 
He-3 timing is in patch panel 223A16, & energy is 223A17.
  
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Cuts used in histograms: neutrons: 40 to 140 ns ; photons: -20 to 30 ns ; noise: 200 to 500ns  
 
Cuts used in histograms: neutrons: 40 to 140 ns ; photons: -20 to 30 ns ; noise: 200 to 500ns  
  
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=run list=
  
  
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=coincidence rates=
 
=coincidence rates=
The y-axis below is calculated as follows: <math>\frac{doubles}{singles-grass}</math> , where ''grass'' is the collection of events that lie outside both the neutron and the gamma ToF range, normalized per ns, and multiplied by the width (in ns) of the neutron ToF range. Forward detectors not included.  
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The y-axis below is calculated as follows: <math>\frac{doubles}{singles-grass}</math> , where ''grass'' is the collection of events that lie outside both the neutron and the gamma ToF range, normalized per ns, and multiplied by the width (in ns) of the neutron ToF range. Forward detectors not included.  The run numbers are, in order from least to most neutron singles, 6293,6292,6288,6280.  
  
 
[[File:NeutronDoublesNSingles.png|600px]]
 
[[File:NeutronDoublesNSingles.png|600px]]

Latest revision as of 00:03, 16 June 2017

go_back


Yesterday's run list

Configuration

The He-3 detector output from the spec amp to the ADC had the wrong polarity


Electronics map for the two auxiliary scintillators

Phi Angle (Degrees) PMT distance Signal cable label HV cable label HV channel on Lecroy Mainframe CFD CH VNIM-ECL channel ROOT variable
~282 m 102B1.2 shv1.2 5:L1.2 1 (left) B-0 evt.TDC[1][25]
~282 m 282T1.7 shv1.7 5:L1.7 2 (left) B-1 evt.TDC[1][26]

He-3 timing is in patch panel 223A16, & energy is 223A17.

High voltage & discriminator settings:

30T: 1450;30 , 30B:1450;30 , 54T: 1500;30 , 54B: 1500;30 , 78T:1500;30 , 78B: 1525;30 , 126T: 1500;30 , 126B: 1500;30 , 150T: 1500;40 , 150B: 1500;40 , 210T: 1500;40 , 210B: 1500;40 , 234T: 1500;30 , 234B: 1500;30 , 258T: 1350;30, 258B: 1450;30 , 306T: 1400;30 , 306B: 1400;30 , 330T: 1450;30 , 330B: 1500;30

Radiator 1.5" Al.

Slits currently at 500 => 19 mm, at 75 =0, at 1000=38 mm, readback number is linear with slit width.

Cuts used in histograms: neutrons: 40 to 140 ns ; photons: -20 to 30 ns ; noise: 200 to 500ns


run list

Run # Charge/pulse Target Configuration Individual histos + rates overlayed histos neutron coincidences per pulse n-coin error neutron coincidences per pulse per Amp doubles/singles
6286 Integral=12.5 pV*s 260 mV peak = 1.4A Empty 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz singles: 7.22E-04 doubles: 0.00E+00 singles: +- 6% doubles: +-inf% singles/A: 5.16E-04 doubles/A: 0.00E+00
6287 Integral=12.5 pV*s 9 mm x 2cm x 4cm thick Al (1/10 R_0) 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz R6286-R6287Overlay.png singles: 8.72E-04 doubles: 0.00E+00 singles: +- 8% doubles: +-inf% singles/A: 6.23E-04 doubles/A: 0.00E+00
6288 Integral=12.5 pV*s 0.5 mm x 4 cm x 2 cm DU-238 R45020 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz , R6286-R6287-R6288Overlay.png 3.20E-03 doubles: 9.11E-06 singles: +- 3% doubles: +-57% singles/A: 2.29E-03 doubles/A: 6.51E-06 doubles/single: 2.85E-03
Coincidence analysis while using data from the first 40 minutes of run 6283 from yesterday, combined with the data from run 6288 ( yesterday's runlist) ====>> singles: +- 1% doubles: +-24% doubles/single: 4.0E-03
6290 Integral=12.5 pV*s 0.5mm x 2cm x 4cm Th #170113000 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz , R6290-R6288Overlay.png singles: 1.76E-03 doubles: 6.64E-06 singles: +- 4% doubles: +-70% singles/A: 1.26E-03 doubles/A: 4.75E-06 doubles/single: 3.77E-03
6291 Integral= 11.5 pV*s HEU Tag #HMF-SNM-ER-2L 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz , R6290-R6291Overlay.png singles: 2.26E-03 doubles: 4.61E-06 singles: +- 2% doubles: +-57% singles/A: 1.61E-03 doubles/A: 3.30E-06 doubles/single: 2.04E-03
6292 Integral= 7.5 pV*s 0.5 mm x 4 cm x 2 cm DU-238 R45020 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 0.9 A Peak , 180.4 Hz R6292.png 2.10E-03 doubles: 9.49E-06 singles: +- 1% doubles: +-25% singles/A: 1.50E-03 doubles/A: 6.78E-06 doubles/single: 4.52E-03
6293 Integral= 4.5 pV*s 0.5 mm x 4 cm x 2 cm DU-238 R45020 10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 0.7 A Peak , 180.4 Hz singles: 1.39E-03 doubles: 3.58E-06 singles: +- 2% doubles: +-49% singles/A: 9.93E-04 doubles/A: 2.56E-06 doubles/single: 2.58E-03


beam profile

circle=2cm ; inner ring = 5cm ; outter ring = 10 cm

Beam profile.jpg

coincidence rates

The y-axis below is calculated as follows: [math]\frac{doubles}{singles-grass}[/math] , where grass is the collection of events that lie outside both the neutron and the gamma ToF range, normalized per ns, and multiplied by the width (in ns) of the neutron ToF range. Forward detectors not included. The run numbers are, in order from least to most neutron singles, 6293,6292,6288,6280.

NeutronDoublesNSingles.png


NeutronDoublesNSinglesClose.png



2nCor_44#Run_Plan