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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, |
|
![R6273-R6274Overlay.png](/./images/thumb/c/c7/R6273-R6274Overlay.png/200px-R6273-R6274Overlay.png) |
|
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, |
|
![R6274-R6275Overlay.png](/./images/thumb/7/71/R6274-R6275Overlay.png/200px-R6274-R6275Overlay.png) |
|
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 |
|
![R6275-R6276Overlay.png](/./images/thumb/b/b7/R6275-R6276Overlay.png/200px-R6275-R6276Overlay.png) |
|
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 |
|
![R6275-R6276Overlay.png](/./images/thumb/b/b7/R6275-R6276Overlay.png/200px-R6275-R6276Overlay.png) |
|
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 |
|
![R6276-R6279Overlay.png](/./images/thumb/8/86/R6276-R6279Overlay.png/200px-R6276-R6279Overlay.png) |
|
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 |
|
![R6279-R6280Overlay.png](/./images/thumb/f/fd/R6279-R6280Overlay.png/200px-R6279-R6280Overlay.png) |
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 |
|
![R6280-R6282Overlay.png](/./images/thumb/6/6a/R6280-R6282Overlay.png/200px-R6280-R6282Overlay.png) |
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. ![R6283.png](/./images/thumb/6/6c/R6283.png/200px-R6283.png) |
|
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, |
|
|
|
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