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

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

3. 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 …………..

4. Reagent samplesSpecificationQuantities Psedecumene (PC)C6H3(CH3)3 : density:0.8870L PPOScintillation grade, 99% density: 1.06500g Mineral OilParaffin oil, Heavy density 0.872200L 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

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

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

7. SampleMO [g][%] Psudecumene PPO[%] POPOP[%] M#1 150.49 (100) 000 C#1100(100)000 MP#1104.77 (99.5)00.50 MP#2100.85 (99.5)00.50 MP#3132.00 (99)010 MP#4115.24 (99)010 MP#5101.67 (98)020 MP#6101.68 (98)020 MC#180(80)2000 MCP#180.03 (80)200.50 MCP#280.00 (80)2010 Current LSc R&D Samples

8. Some more LSc samples SampleMO [g][%]PsudecumenePPO[%][g]POPOP[%][g] MCPO#180.00 (80)200.50.006 MCPO#2 80.00 (80)2010.008 MCPO#3 80.009 (80)200.68.0057 MCPO#4 80.002 (80)200.680.01 MCPO#5 80.002 (80)201.00.0057 MCPO#6 80.006 (80)203.00.0057 MCPO#8 80.00 (80)202.00.0057 MCPB#3 80.008 (80)200.68(bisMSB)0.0057

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

10. 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