05-3-2017
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] |
run list
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 # | 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 |  |
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 , |  |
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 , |  |
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 , |  |
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 |  |
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
coincidence rates
The y-axis below is calculated as follows: , 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.
