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Time LOG

CRYTUR 01

Date	Experimenter(s)	Description	Comments
xx/xx/2015	Marco	Wrapped	Preparing for light yield measurement. Approximately 5 layers of teflon tape, and 2 layers of black tape.
xx/xx/2015	Marco	LY scan	...
12/14/2015	Marco	unwrapped	Preparing for annealing.
12/14/2015	Marco	Thermal annealing	Starting 11:00AM. Ramp up at 18oC/hour until 200oC, stay at 200oC for 10 hours, ramp down at -18oC/hour.
12/17/2015	Marco	Longitudinal Transmittance	After annealing.
07/15/2016	Summer Students	Longitudinal Transmittance	Wavelength:200-800nm.
08/11/2016	Summer Students	LY scan	RUN:3411. Motor was lowered to approximately 5 cm down crystal. ~18oC. LY: 11.986 phe/MeV-
11/18/2016	Rich	Light Yield Scan	Run 3422: ~100 events; 10 cm crytur crystal wrapped with ~4 layers of teflon tape and 2 layers of black electrical tape. T=18°C. LY = 9.3978 pe/Mev (see pictures below). Not enough runs? Note: the error bars used were not the 0.5 standard used previously, but instead the calculated uncertainty for each run.
11/29/2016	Salina	Light Yield Scan	Run 3432: ~100K events; 10 cm crytur crystal wrapped with ~5 layers of teflon tape and 2 layers of black electrical tape. T=18°C. LY = 8.23 ± 1.08 pe/MeV. Not enough statistics? Need to re-run with more stats (see pictures below)
11/30/2016	Salina	Light Yield Scan	Run 3434: ~1.4M events; Re-run of 10 cm crytur crystal wrapped with ~5 layers of teflon tape and 2 layers of black electrical tape. T=18°C. LY = 9.67 ± 0.53 pe/MeV (see pictures below).
12/02/2016	Rich	Longitudinal Transmittance	Measured center of crystal before annealing.

Transmittance measurements

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

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

Pictures at 12/14/2015

CRYTUR shown inside oven for thermal annealing.

Light Yield

Run 3422 taken on 11/18/2016: Fit of histogram with ~100K events.

Run 3422 taken on 11/18/2016: LY as a function of position. Error bars based off calculatd uncertainty.

Run 3432 taken on 11/29/2016: Fit of histogram with ~100K events.

Run 3432 taken on 11/29/2016: LY as a function of position.

Run 3434 taken on 11/29/2016: Fit of histogram with ~1.4M events.

Run 3434 taken on 11/29/2016: LY as a function of position.

Additional Data/Info

Graph showing CRYTUR crystal longitudinal measurements before annealing (red) and after annealing (green).

Graph showing the difference of the CRYTUR crystal longitudinal measurements before and after annealing.