Status of Mineral Oil R&D

1st RENO Collaboration Meeting

Daejung Kong, KNU

Introduction

Liquid Scintillator R&D Environment

R&D Status

Summary

Outline

Gd (Neutron catcher )+

Liquid Scintillator ( catcher)

p

νe

e+

e-

γ(0.511MeV)

γ(0.511MeV)

n

Gd

γ

γ γ

γ

E ~ 8MeV

30μs

prompt signal

Delayed signal

• Baseline Oil

– Mineral oil, Dodecane

– LONG attenuation length

• Scintillant material

– Pseudocumene(PC), PXE, toluene

• 1st wavelength shifter

– Wavelength ≤300 nm ~350 nm

– PPO, p-Terphenyl, PBD, Naphthalene

• 2nd wavelength shifter

– Wavelength ~350 nm ~ 425 nm

– POPOP, bis-MSB

• Other wavelength shifter

– Wavelength ≤ 300 nm ~ 425 nm

– BPO

Liquid Scintillator (LSc)

Introduction

Introduction II

• 1st Stage : Setup LSc R&D Environment

– Preparation of reagent samples

– Several LSc sample tests (cosmic ray, radioactive source)

– Accumulation of other Exp. information

• 2nd Stage : Long term stability Test

– Aging Test

– Absorption, Transparency, Light yield test, Etc.,

– Different Solvent Mixtures

• 3rd Stage

– LSc + Gd mixture

– And Test …………..

03/31/06 : Mineral Oil arrived from SNU

05/12/06 : PC and stuffs arrived

05/15/06 : N2 gas arrived

05/18/06 : First LSc samples produced

05/23/06 : First LSc samples tested

05/25/06 : Acryl Box construction

05/26/06 : First LSc R&D Group Meeting

06/01/06 : Survey of M.O in Korea

06/08/06 : Collection of M.O from Korean Co.

06/28/06 : Korean M.O Test

LSc R&D History at KNU

Preparation for LSc R&D

Testing

Reagent samples Specification QuantitiesPsedocumene (PC) C6H3(CH3)3 : density:0.88 70L

PPO Scintillation grade, 99% density: 1.06 500g

Mineral Oil Paraffin oil, Heavy density 0.872 200L

POPOP(C24H16N2O2) 1,4-bis-[2(5-phenyloxazolyl)-bezene 100g

LSc R&D Equipments

• Precise valance (up to 0.001g)• Small bottles for LSc samples• N2-gas

• Radioactive source (60Co) • PMT : PHILIPS VD202B : HV=1,200V, gain~106

• Power supply : keithley 248• Pico-ammeter : keithley 485• Oscilloscope : Tectronix TDS620B

cf) Purchased from Aldrich

Sample Mixing

Sample Test

LSc R&D Procedure

LSc samples (MO+PC+PPO+POPOP)

Radio-active source (60Co)

Pico-ammeter

Cosmic Ray

Oscilloscope

LSc R&D Environment

N2 injection

PC : Toxic

LSc Mixing

3 일 후 1%PPO + Mineral Oil

Sample MO [g][%] Psudecumene PPO[%] POPOP[%] Remark

M#1 150.49 (100) 0 0 0

C#1 100(100) 0 0 0

MP#1 104.77 (99.5) 0 0.5 0 w/o N2

MP#2 100.85 (99.5) 0 0.5 0 w/ N2

MP#3 132.00 (99) 0 1 0 w/o N2

MP#4 115.24 (99) 0 1 0 w/ N2

MP#5 101.67 (98) 0 2 0 w/o N2

MP#6 101.68 (98) 0 2 0 w/ N2

MC#1 80(80) 20 0 0 w/o N2

MCP#1 80.03 (80) 20 0.02 0 w/o N2

MCP#2 80.00 (80) 20 1 0 w/ N2

MCPO#1 80.00 (80) 20 0.2 0.006 w/o N2

MCPO#2 80.00 (80) 20 1 0.008 w/o N2

Current LSc R&D Samples

Storage for LSc Samples

LSc Test Setup60Co source

Sample MO [g][%] Psudecumene PPO[%] POPOP[%] 60Co[nA]

M#1 150.49 (100) 0 0 0 18

C#1 0 100 0 0 21

MP#1 104.77 (99.5) 0 0.5 0 95

MC#1 80(80) 20 0 0 36

MCP#1 80.03 (80) 20 0.5 0 362

MCP#2 80.00 (80) 20 1 0 403

MCPO#2 80.00 (80) 20 1 0.08 458

LSc Sample Tests with 60Co

원유 (crude oil)연료유(fuel oil) B.C. asphalt

YU-base

Mineral Oil (white)

식품 (foods), 화장품 (cosmatics), Etc.,

(www.seojinchem.com)

refinement

refinement

: extract heavy metal

Mineral Oil

M.O

알리파틱 + 나프텐 + 아로마틱

1. BMP 10 : YU-base (before Mineral Oil) 82. BMP 32 : YU-base (before Mineral Oil) 83. BMP 100 : Mineral Oil (‘S-Oil’ -> P96) 5 4. BSO 17 : poly alpha olleffine : 합성유 95. BSO 400 : poly alpha olleffine : 합성유 96. KL 350(S) : White Oil ( 서진화학 ) 97. Silicone Oil (100 cSt/250C) 98. Silicone Oil (1000 cSt/250C) 89. Reference : Mineral Oil (Aldrich) 9

Viscosity 60Co Test [nA]

Comparison of Mineral Oil b/w Aldrich and Korean Company

20mg

Summary

: Setup LSc R&D Environment

The results of LSc test are consistent

Learned Know-How

1st Stage

2nd Stage : Equipment preparation

Absorp, Transp, Light yield, Atten test

Long Stability test

Back up

Double-CHOOZ KamLAND