NAA SolarPanel
SOlarPanel A Irradiation on Jack
Irradiated on Jack by placing samples just above the Radiator as shown in the picture.
Beam parameters: Irradiation Date : 5/23/18
Start Time: 09:07:30
Stop Time: 11:07:30
Rep Rate=300 Hz
I = 98 mA
Pulse Width = 10 usec
E = 38 MeV
The solar panel current output dropped 1 mA per hour during irradiation. The cove was too dark to produce a signal from ambient light. The observed signal was completely due to the electron beam.
In File name:10uC_Cs_Mn_SolarPan_DetD_55.5cm_002.lst
Measurements started at 14:45:38, 2:38:08 (158 min, 9488 sec) after irradiation ended,
Add 9488 seconds to time below to get time since irradiation
| Time (sec) | Sample |
| 0 | Cs-137 (661 keV line) #64121 55.5 cm away from face |
| 360 | Mn sample (1.7 g, 1.5 cm x 1.5 cm square, 847 keV) 55.5 cm away from face |
| 690 | Thorium Rods on face of detector |
| 1020 | Solar Panel A 55.5 cm away from face |
| 1410 | Cs-137 #129792 55.5 cm away from face |
| 1820 | Mn sample (847 keV) 55.5 cm away from face |
| 2230 | Cs-137 #129792 55.5 cm away from face (0.54% deadtime) |
| 2560 | Solar Panel A 55.5 cm away from face (0.55% deadtime, 300 Hz DAQ rate) |
| 2880 | Cs-137 (661 keV line) #64121 55.5 cm away from face (1.1% deadtime, 350 Hz) |
| 3070 | Mn sample (847 keV) 55.5 cm away from face (13 % deadtime, 4600 Hz) |
| 3330 | Ignore (Mn source was too close) Cs-137 #129792 15 cm away from face(6 % deadtime, 2000 Hz) |
| 3600 | Cs-137 #129792 15 cm away from face(.5 % deadtime, 200 Hz) |
| 4000 | Solar Panel A 15 cm away from face (2 % deadtime, 880 Hz DAQ rate) |
Check out Solar panel channels
root [24] MPA->Draw("evt.Chan>>(496,0,496)","evt.Sec> 2560 && evt.Sec<2800 && evt.Chan >306 && evt.Chan < 311");
root [25] MPA->Draw("evt.Chan>>(496,0,496)","evt.Sec> 1020 && evt.Sec<1260 && evt.Chan >306 && evt.Chan < 311");
Calibration
| Source | Energy (keV0 | Channel |
| Th Rod | 238.8 (highest peak) | 487.2 +/- 1.1 |
| Th Rod | 338.8 (4th highest) | 690.4 +/- 1.3 |
| Th Rod | 511 | |
| Th Rod | 583.4 (2nd highest peak) | 1189.6 + / 1.2 |
| Cs-137 | 661.7 | 1350 |
| Th Rod | 911.2 (3rd highest) | 1858.3 +/- 1.4 |
| Th Rod | 2614.6 | 5331.0 +/- 2.2 |
Energy (keV) = (0.065 +/- 1.34) + Channel*(0.490287 +/- 0.001174)
MPA->Draw("evt.Chan*(0.490) >>(6096,0,6096)","evt.Sec > 690 && evt.Sec < 1000");
Solar Panel Lines of interest
491, 528, 552.5, 847 , 1097 , 1293, 1303, 1810, 1997
In File name:10uC_Cs_Mn_SolarPan_DetD_55.5cm_003.lst
The measurement below started at 16:24:09, 4:16:39 after irradiation ended
Add 15399 seconds to time below to get time since irradiation
| Time (sec) | Sample |
| 0 | Thorium Rods on face of detector (2% deadtime, 750 Hz) |
| 350 | Mn sample (847 keV) 55.5 cm away from face (12% deadtime, 3800 Hz) |
Ended measurements at (9:34 am Thursday, 5/24/18)
Neutron capture cross section for manganese