| Budget Amount *help |
¥152,100,000 (Direct Cost: ¥117,000,000、Indirect Cost: ¥35,100,000)
Fiscal Year 2023: ¥40,300,000 (Direct Cost: ¥31,000,000、Indirect Cost: ¥9,300,000)
Fiscal Year 2022: ¥33,930,000 (Direct Cost: ¥26,100,000、Indirect Cost: ¥7,830,000)
Fiscal Year 2021: ¥21,970,000 (Direct Cost: ¥16,900,000、Indirect Cost: ¥5,070,000)
Fiscal Year 2020: ¥30,420,000 (Direct Cost: ¥23,400,000、Indirect Cost: ¥7,020,000)
Fiscal Year 2019: ¥25,480,000 (Direct Cost: ¥19,600,000、Indirect Cost: ¥5,880,000)
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| Outline of Final Research Achievements |
This research program performed direction-sensitive dark matter search experiments making use of low background technologies. The low background technologies are the backbone technologies in the innovative area grant-in-aid "Unraveling the History of the Universe and Matter Evolution with Underground Physics", where this project was one of the planned research programs. Low background detectors (gas detectors and nuclear emulsion detectors), as well as low background gas filter were developed as planned. A direction-sensitive dark matter search experiment in Kamioka underground laboratory provided dark matter limits about one order of magnitude more stringent than previous direction-sensitive limits. Ambient neutron flux in surface and underground environment at Gran Sasso National Laboratory were measured as one of the background studies and a first direction-sensitive dark matter search with nuclear emulsions were carried out.
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