Long term measurement of neutron flux at deep underground and evaluation of neutron contribution to rare event searches
| Project/Area Number |
15K05100
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2015-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
|
|---|
| Keywords | 暗黒物質探索 / ダブルベータ事象探索 / ニュートリノ観測 / 地下実験室 / 中性子束 / 中性子バックグラウンド / 暗黒物質探索実験 / 中性子検出器 / 季節変動 |
|---|
| Outline of Final Research Achievements |
We established a monitor system for neutron flux in deep underground site by using liquid scintillator, photo multipliers, and data aquisition equipments. We measured neutron flux at Kamioka Obserbatory (2700 m.w.e.) for more than 150 continuous days. Based on the measurements, we evaluated effect of neutron to background of XMASS experiment which is dark matter search experiment and has been running at the same term by using Monte Carlo simulation. As a result, improvement of sensitivity for dark matter search became possible owing to evaluation of neutron background as well as other contributions.
|
Report
(4 results)
Research Products
(4 results)
