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Time LOG

SICCA J20

Date	Description	Comments
12/14/2015	Pictures	Documentation of crystal's conditions as it arrived at CUA.
12/15/2015	Thermal annealing	Ramp up at 18oC/hour up to 200oC. Stays for 10 hours and ramp down at 18oC/hour.
12/17/2015	Transverse Transmittance	Scan at 360, 420, and 620nm.
12/18/2015	Irradiation	160 keV photons at 6mA, for 10min.
12/18/2015	Transverse Transmittance	Scan at 360, 420, and 620nm after 30 min of irradiation.
01/07/2016	LY scan	LY measurement with window width of 100ns, at 18oC (see run 3098). LY = 14.76 pe/MeV.
03/04/2016	Transverse Transmittance	At the center of the crystal, every nm from 200nm until 800nm. Sample: 1313
03/04/2016	Dimensions	Crystal's dimensions measured. Length and six points of width (3 in each face).
05/23/2016	Transverse Transmittance Scan	Wavelengths: 200-800 nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/08/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Measured effect of off-center placement of crystal on transmittance. +1.3°, +2.3°, -1.3°, -2.3.
07/08/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Measured light beam entering both end face of crystal in spectrometer. "flip" of crystal.
07/23/2016	Light Yield	Run: 3246. 3 layers of teflon tape and 1 of electrical. ~50.000 incidents and ~18 degrees Celsius
07/28/2016	Transverse Transmittance	At 10cm. 200-800nm wavelength.
07/28/2016	X-Ray Irradiation	160kV 6.3mA 70 minutes. 14.16 cm for LabJack on shelf 8. 6290R/min ionization rate.
07/28/2016	Transverse Transmittance (spectrometer failure)	Unsuccessful measurement of transmittance.

Pictures at 12/14/2015

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Light Yield

07/23/2016