Status of Mineral Oil R&D 2 nd LSc R&D Group Meeting 2006/07/27 Adil, KNU

Introduction Liquid Scintillator R&D Environment R&D Status Summary Outline

Introduction 1 st Stage : Setup LSc R&D Environment Preparation of reagent samples Several LSc samples test (cosmic ray, radioactive source) Accumulation of other Exp. Information Purification of Mineral Oil 2 nd Stage : Long term stability Test Aging Test Absorption, Transparency, Light yield test, Etc., Different Solvent Mixtures 3 rd Stage LSc + Gd mixture And Test …………..

Reagent samplesSpecificationQuantities Psedecumene (PC)C6H3(CH3)3 : density:0.8870L PPOScintillation grade, 99% density: g Mineral OilParaffin oil, Heavy density L POPOP(C 24 H 16 N 2 O 2 )1,4-bis-[2(5-phenyloxazolyl)-bezene100g BisMSB1,4-Bis(2-methylstyryl)benzene5g Aluminum OxideAl2O35Kg LSc R&D Equipments Precise balance (up to 0.001g) Small bottles for LSc samples N 2 -gas Radioactive source ( 60 Co) PMT : PHILIPS VD202B : HV=1,200V, gain~10 6 Power supply : keithley 248 Pico-ammeter : keithley 485 Oscilloscope : Tectronix TDS620B cf) Purchased from Aldrich Sample Mixing Sample Test

Liquid Scintillator R&D Environment Window for take in & out Setup for N2 gas Aluminum duct For the output of Toxic gas

LSc R&D Procedure LSc samples (MO+PC+PPO+POPOP) Radio-active source ( 60 Co) Pico-ammeter Cosmic RayOscilloscope Source ( 60 Co)

SampleMO [g][%] Psudecumene PPO[%] POPOP[%] M# (100) 000 C#1100(100)000 MP# (99.5)00.50 MP# (99.5)00.50 MP# (99)010 MP# (99)010 MP# (98)020 MP# (98)020 MC#180(80)2000 MCP# (80) MCP# (80)2010 Current LSc R&D Samples

Some more LSc samples SampleMO [g][%]PsudecumenePPO[%][g]POPOP[%][g] MCPO# (80) MCPO# (80) MCPO# (80) MCPO# (80) MCPO# (80) MCPO# (80) MCPO# (80) MCPB# (80)200.68(bisMSB)0.0057

Double Chooz : Dod(80%)+PXE(20%)+PPO(6g/L)+bisMSB(50mg/L)

Summary : Setup LSc R&D Environment The results of LSc test are consistent Learn to Know-How 1 st Stage 2 nd Stage : Equipment preparation Absorp, Transp, Light yield, Atten test Long Stability test