PbF2 CrystalNumber16

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Below are the resulting transparency measurements for PbF2 block # 16

12/3/07

Accelerator Settings
beam energy 20 MeV
Rep Rate: 30 Hz
I_peak: 60 mA/pulse
pulse width: 0.1 [math]\mu[/math]s (100 ns)
beam start: 15:39
beam stop: 16:39
Pick-up Coil Pulse Recording (PbF2 crystal at z=30cm away)

O-scope pulses were recorded on the pick-up coil with dimensions in inches and the intensity measured in Volt [math]\times[/math] ns

@16:00 PbF2 Crystal 16 Z-30cm 4pm.jpg

@16:05 PbF2 Crystal 16 Z-30cm 405pm.jpg

@16:10 PbF2 Crystal 16 Z-30cm 410pm.jpg

@16:15 PbF2 Crystal 16 Z-30cm 415pm.jpg

@16:20 PbF2 Crystal 16 Z-30cm 420pm.jpg

@16:25 PbF2 Crystal 16 Z-30cm 425pm.jpg

@16:30 PbF2 Crystal 16 Z-30cm 430pm.jpg

@16:39 PbF2 Crystal 16 Z-30cm 439pm.jpg

Dose rate measurements (@1643 hours)
[math]\gamma[/math]-radiation 3.5 mR/hr
[math]\beta[/math]-radiation: 12 mR/hr
Dose rate measurements (@1532 hours)
[math]\gamma[/math]-radiation 3 mR/hr
[math]\beta[/math]-radiation: 7 mR/hr

12/4/07

Transparency measurements (@0957 hours)

Block16.JPG Block1690deg.JPG

Under Blue light for 19 hours before next irradiation.

12/5/07

Accelerator Settings
beam energy 20 MeV
Rep Rate: 30 Hz
I_peak: 60 mA/pulse
pulse width: 0.1 [math]\mu[/math]s (100 ns)
beam start: 08:38
beam stop: 10:38
Pick-up Coil Pulse Recording (PbF2 crystal at z=30cm away)

O-scope pulses were recorded on the pick-up coil with dimensions in inches and the intensity measured in Volt [math]\times[/math] ns

@8:57 Pulseb16857.JPG

@9:07 Pulseb16907.JPG

@9:17 Pulseb16917.JPG

@9:27 Pulseb16927.JPG

@9:37 Pulseb16937.JPG

@9:47 Pulseb16947.JPG

@9:57 Pulseb16957.JPG

@10:07 Pulseb161007.JPG

@10:17 Pulseb161017.JPG

@10:27 Pulseb161027.JPG


Dose rate measurements (@1040 hours)
[math]\gamma[/math]-radiation 2 mR/hr
[math]\beta[/math]-radiation: 3 mR/hr


After: DSCF1565.JPG Just after 2nd irradiation (2 hours). Light brown color (translucent).