| Budget Amount *help |
¥101,270,000 (Direct Cost: ¥77,900,000、Indirect Cost: ¥23,370,000)
Fiscal Year 2022: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2021: ¥24,700,000 (Direct Cost: ¥19,000,000、Indirect Cost: ¥5,700,000)
Fiscal Year 2020: ¥23,660,000 (Direct Cost: ¥18,200,000、Indirect Cost: ¥5,460,000)
Fiscal Year 2019: ¥22,750,000 (Direct Cost: ¥17,500,000、Indirect Cost: ¥5,250,000)
Fiscal Year 2018: ¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
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| Outline of Final Research Achievements |
We have developed a detector technology to search for neutrino-less double beta decay(0νββ) beyond the neutrino effective mass region of 100 meV/c2 by using a time projection chamber with xenon gas.
These include an ionizing electron detection plane that can be modularized and enlarged, a signal waveform digitizer, a Cockcroft-Walton circuit and ring-shaped electrodes to generate a drift electric field, a circulation system to purify the gas, and low emission of the detector components.
Incorporating these techniques into a 180-liter gas vessel, we succeeded in obtaining high energy resolution for electrons near the 0νββ energy as well as reconstructing the trajectory.
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