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PLAN FOR LONG TERM STABILITY FOR GDLS. Kwon Eun Hyang. CONTENTS. Long term Stability Sample -Gd LS : Gd(TMHA) 3 , Gd(MVA) 3 -LS Sample Measurements for Long term Stability -Attenuation length : UV Spectrometer -Light Yield. LONG TERM STABILITY TEST(GDLS).
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PLAN FOR LONG TERM STABILITY FOR GDLS Kwon Eun Hyang
CONTENTS • Long term Stability Sample -Gd LS : Gd(TMHA)3, Gd(MVA)3 -LS Sample • Measurements for Long term Stability -Attenuation length : UV Spectrometer -Light Yield
LONG TERM STABILITY TEST(GDLS) • 목적 : Oxidation 과 GdR3침전으로 인한 att.length 와 LY변화측정 , RENO 실험 동안(약 3년 정도) 거의 변화가 없을 지 확인 • Long term samples - Gd(TMHA)3 :base (LAB, PC20%+Dodecane80%) - Gd(MVA)3 : control(LAB, PC20%+Dodecane80%) - LS Sample : gamma catcher
SAMPLE PREPARATION FOR LONG TERM STABILITY TEST Att.length – special cuvette Light Yield – 20ml vial Vaccum desiccator 보관 공기 중 보관 Att.length – cuvette Lignt Yield – 20ml vial
LONG TERM MEASUREMENT • Att.length • 문제점 : 측정 시 마다 error 가 큼.(최대 5m) , cuvette treatment에 따른 오차 -> special cuvette 사용
LONG TERM MEASUREMENT • Light Yield Long term sample measurement 1. absolute – single photo electron(S.P.E) 측정 하여 Long term 값과 비교 2. Comparison – CsI 값과 Long term 값과 비교
LONG TERM MEASUREMENT • Light Yield (Special PMT holder and Dark Box) Dark Box PMT Holder
SUMMARY • Measurement Sample -Gd(TMHA)3, Gd(MVA)3현재 제작중 • Measurement Period - 3개월동안은 하루에 한 번 측정(?) - 3개월이후는 일주일에 한 번 측정(?)