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Time LOG

**SICCA J41**
Date	Description	Comments
04/29/2016	Pictures	Documentation of crystal's conditions as it arrived at CUA.
04/29/2016	Thermal annealing	Ramp up at 18oC/hour up to 200oC. Stays for 10 hours and ramp down at 18oC/hour.
05/19/2016	Transverse Transmittance	At the center of the crystal, every nm from 200nm until 800nm. Sample: 1355
05/20/2016	Light Yield	Run 3216: crystal wrapped with ~5 layers of teflon tape and 2 layers of black electrical tape. Steps of 20min, 1cm. T=18°C. LY = 12.53 ± 0.672 pe/MeV.
05/20/2016	Transverse Transmittance Scan	Wavelengths: 360nm, 420nm, 620nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/08/2016	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/26/2016	Light Yield	Run: 3255. 3 layers of teflon tape, 1 layer of electrical tape. ~50,000 incidents. Light Yield: 13.40011277 pe/MeV
07/27/16	Light Yield	3 layers of teflon 1 later of electrical. ~50,000 incidents at ~18 degrees Celsius. 200ns gatewidth->900ns gatewidth. 200ns: 3321, 300ns:3322, 400ns:3323, 500ns:3324, 600ns:3325, 700ns:3328, 800ns:3329, 900ns:3330
07/07/2017	Longitudinal Transmittance Scan	Wavelengths: 200-800 nm. Sampling period: 0.6s, moving motor at 2mm/s.
07/10/2017	Light Yield	Run 3694. 100ns gw. ~50,000 incidents ~3 layers of teflon tape ~1 layer of electrical. LY=7.509 pe/MeV.
08/01/2017	Summer Students	Transverse Transmittance Scan --Wavelengths: 200-800 nm. 10cm down.
08/01/2017	Summer Students	Xray Radiation 70 minutes, 160mV, 6mA. ___ mm from beam origin. Wait time to transmittance measurement ~2 minutes... not constant.dk= 0.8562
08/02/2017	Summer Students	Transverse Transmittance Scan Wavelengths: 200-800 nm. 10cm down.
08/02/2017	Summer Students	LED curing 34 LEDs, 3.5 V for 7 minutes.
08/02/2017	Summer Students	Transverse Transmittance Scan-- Wavelengths: 200-800 nm. 10cm down.
08/02/2017	Summer Students	LED curing 34 LEDs, 3.5 V for 7 more minutes (14 total).
08/02/2017	Summer Students	Transverse Transmittance Scan-- Wavelengths: 200-800 nm. 10cm down.
08/02/2017	Summer Students	LED curing-- 34 LEDs, 3.5 V for 7 more minutes (21 total).
08/02/2017	Summer Students	Transverse Transmittance Scan--Wavelengths: 200-800 nm. 10cm down.