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Time LOG

SICCA J18

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	Long. Transmittance	Note: crystal NOT wrapped.
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.
01/05/2016	LY scan	At 100ns, as described in run 3047.
03/04/2016	Transverse Transmittance	At the center of the crystal, every nm from 200nm until 800nm. Sample: 1315
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. Measured effect of off-center placement of crystal on transmittance. +1.3°, +2.3°, -1.3°, -2.3.
07/06/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Measured effect of which face of crystal faced light beam in spectrometer. "flip" of crystal.
07/07/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Measured effect of iris diameter on transmittace. 8mm, 11.5mm (used), 15mm, 17mm.
07/14/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Remeasured effect of off-center placement of crystal on transmittance BUT with removal of all residue/tape off 2x2 crystal face. +1.3°, +2.3°, -1.3°, -2.3.
07/21/2016	Light Yield (unmeasured)	Crystal accident , crack on 2x2 face of crystal.
07/28/2016	Transverse Transmittance	200-800nm wavelengths. 10cm down crystal.

Transmittance measurements

Longitudinal transmittance measured at Lambda 750 (no integrating sphere).
Longitudinal transmittance measured at Lambda 950 (integrating sphere).

Pictures at 12/14/2015

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On July 21 when crystal was put in to test light yield (light yield was not taken).