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Time LOG

SICCA J21

Date	Description	Comments
12/14/2015	Pictures	Documentation of crystal's conditions as it arrived at CUA.
01/28/2016	Thermal annealing	Ramp up at 18oC/hour up to 200oC. Stays for 10 hours and ramp down at 18oC/hour.
02/25/2016	Light Yield	Run 3145: crystal wrapped with ~5 layers of teflon tape and 2 layers of black tape. Steps of 20min, 1cm. T=18oC. LY = 15.97 pe/MeV.
03/04/2016	Transverse Transmittance	At the center of the crystal, every nm from 200nm until 800nm. Sample: 1312
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.
07/06/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/15/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/21/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/21/2016	Light Yield	Run:3236 3 layers of teflon tape and 1 layer of elecrtical. ~50,000 incidents recorded at ~18 degrees Celsius.

Pictures

12/14/2015.	12/14/2016.
7/18/16. The lid of Spectrometer fell on crystal. Dimensions of chip are 15.88x10.15x9.62mm