| Project/Area Number |
11640293
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
素粒子・核・宇宙線
|
|---|
| Research Institution | HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION |
|---|
Principal Investigator |
YOASHIMURA Yoshio HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, INSTITUTE OF PARTICLE AND NUCLEAR STUDY, PROFESSOR, 素粒子原子核研究所, 教授 (50013397)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TAKEUTCHI Fujio KYOTO SANGYO UNIVERSITY, FACULTY OF SCIENCE, PROFESSOR, 理学部, 教授 (40121537)
KOBAYASHI Masaaki HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, INSTITUTE OF PARTICLE AND NUCLEAR STUDY, PROFESSOR, 素粒子原子核研究所, 教授 (40013388)
|
|---|
| Project Period (FY) |
1999 – 2000
|
| Project Status |
Completed (Fiscal Year 2000)
|
| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥1,500,000 (Direct Cost: ¥1,500,000)
|
|---|
| Keywords | SCINTILLATION FIBER / VACUUM RESISTANCE / CROSS TALK / MOLYBDEN-SULFATE COATING / 2 PARTICLES DETECTION / PEAK SENSING CIRCUIT / π^+π^-原子 / 挑接着 / 2粒子事象検出 / 接続補強 |
|---|
| Research Abstract |
In order to detect two particles flying very closely, we studied to install a scintillating fiber hodoscope in vacuum and magnetic field. When two particles have opposit charge or different momenta each other, these particles could be pulled apart with magnetic field. In our experiment, Lifetime Measurement of π^+π^- Atom to Test Low Energy QCD Prediction : CERN-PS212(DIRAC), π^+π^- must be detected efficiently discriminating heavy background of single particle.
Since multicladding fiber trap light yield of more than 50% comparing with that of single cladding fiber, we chose the Kurary Multicldding Scintillating Fiber (SCSF-81M) and examined the performance and effects for vacuum during 1000 hours. The vacuum damage was not found on the light yield and the atenuation length.
Leadind-out fibers from a vacuum bassel was attempted to examinate vacuum leak, and cross talk was also measured to be less than 1%
|
