| Project/Area Number |
16560738
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Nuclear engineering
|
|---|
| Research Institution | Japan Atomic Energy Agency |
|---|
Principal Investigator |
YAMAGUCHI Yasuhiro Japan Atomic Energy Agency, Nuclear Science Research Institute, Department of Radiation Protection, Deputy Director, 放射線管理部, 次長 (40354708)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ENDO Akira Japan Atomic Energy Agency, Nuclear Science and Engineering Directorate, Group Leader, 原子力基礎工学研究部門, 主任研究員 (10354705)
SATO Tatsuhiko Japan Atomic Energy Agency, Nuclear Science and Engineering Directorate, Scientist, 原子力基礎工学研究部門, 研究職 (30354707)
SATOH Daiki Japan Atomic Energy Agency, Nuclear Science and Engineering Directorate, Scientist, 原子力基礎工学研究部門, 研究職 (00370403)
|
|---|
| Project Period (FY) |
2004 – 2006
|
| Project Status |
Completed (Fiscal Year 2006)
|
| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
|
|---|
| Keywords | Neutron monitor / High-energy neutron / Thermal neutron / Scintillation detector / Response function / Neutron dose / Radiation protection |
|---|
| Research Abstract |
A new radiation dose monitor, designated as DARWIN (Dose monitoring system Applicable to various Radiations with Wide energy ranges), has been developed for real-time monitoring of doses in workspaces and surrounding environments of highenergy accelerator facilities. DARWIN is composed of a phoswitch-type scintillation detector, which consists of liquid organic scintillator BC501A coupled with ZnS(Ag) scintillation sheets doped with 6Li, and a data acquisition system based on a Digital-Storage-Oscilloscope. DARWIN has the following features : (1) capable of monitoring doses from neutrons, photons and muons with energies from thermal energy to 1 GeV, 150 keV to 100 MeV and 1 MeV to 100 GeV, respectively, (2) highly sensitive with precision and (3) easy to operate with a simple graphical user-interface.
The performance of DARWIN was examined experimentally in several radiation fields. The results of the experiments indicated the accuracy and wide response range of DARWIN for measuring dose rates from neutrons, photons and muons with wide energies. It was also found from the experiments that DARWIN enables us to monitor small fluctuations of neutron dose rates near the background level because of its high sensitivity. With these properties, DARWIN will be able to play a very important role for improving radiation safety in high-energy accelerator facilities.
|
