05-2-2017
Jump to navigation
Jump to search
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.
Small aux. scintillators have a CFD threshold of 0.550 V for run 6274 and later.
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| 6272 | 18 pV*s | D2O | 7.5 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , | singles: 3.63E-03 doubles: 6.69E-06 | singles: +- 4% doubles: +-100% | singles/A: 2.59E-03 doubles/A: 4.78E-06 | doubles/single: 1.85E-03 | ||
| 6273 | 21 pV*s | 0.5mm x 2cm x 4cm Th #170113000 | 7.5 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, teed off Beam current monitor changing pulse size from 21 pV*s to 14 pV*s , inserted beam current into PADC ch 6 20 minutes into run | ||||||
| 6274 | 12 pV*s | 0.5mm x 2cm x 4cm Th #170113000 | 7.0 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, |  |
|||||
| 6275 | 10 pV*s | Al | 7.0 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, |  |
|||||
| 6276 | 10 pV*s | Al | 7.0 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, added 2" lead on beam right side of magnet |  |
|||||
| 6278 | 10 pV*s | 1" diam DU 111108007 | 7.0 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, added 2" lead on beam right side of magnet | |
|||||
| 6279 | 12 pV*s | 1" diam DU 111108007 | 9.0 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, added 2" lead on beam right side of magnet |  |
|||||
| 6280 | 11.5 pV*s | 1" diam DU 111108007 | 10.6 MeV , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, added 2" lead on beam right side of magnet |  |
singles: 3.96E-02 doubles: 7.49E-04 | singles: +- 1% doubles: +-8% | singles/A: 2.83E-02 doubles/A: 5.35E-04 | doubles/single: 1.89E-02 | |
| 6282 | 11.5 pV*s | 0.5 mm x 4 cm x 2 cm DU-238 R45020 | 10.6 MeV , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz , small Scint at .725 m and 1.45 m, added 2" lead on beam right side of magnet |  |
singles: 4.87E-03 doubles: 2.47E-05 | singles: +- 1% doubles: +-24% | singles/A: 3.48E-03 doubles/A: 1.77E-05 | doubles/single: 5.07E-03 | |
| 6283 | 11.5 pV*s | 0.5 mm x 4 cm x 2 cm DU-238 R45020 | HV tripped around pulse 498,000 ; 10.6 MeV , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz , Removed small Scint at .725 m Kept Scint in at 1.45 m, | Histograms only includes pulses with HV on.  |
|||||
| 6284 | 11. pV*s | 9 mm x 2cm x 4cm thick Al (1/10 R_0) | HV off for entire run. | ||||||
| 6285 | 11. pV*s | 9 mm x 2cm x 4cm thick Al (1/10 R_0) | 10.6 MeV , 3 ns FWHM pulse width , 1.3 A Peak , 180.4 Hz , Removed small Scint at .725 m Kept Scint in at 1.45 m, |
Analysis