| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2012: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
We develop monolithic active pixel sensors, X-ray SOIPIXs, based on the SOI technology for next-generation X-ray astronomy satellites. In order to reduce the non-X-ray background dominating above 5-10 keV using the anti-coincidence technique, we develop the event trigger output function implemented in each pixel.
In this study, we developed 4 sensors. The largest chip has the size of 6mm. We successfully produced a fully depleted layer with a thickness of 500μm. We also achieved an energy resolution of 320 eV (FWHM) at 6 keV and a read-out noise of 35e- (rms) in the frame readout mode, which allows us to clearly resolve Mn-Kα and Kβ. We found in-pixel circuitries disturb the electric fields in the sensor and degrade the charge collection efficiency. We successfully solved the problem by changing the location of the in-pixel circuitries. The event-driven readout mode was successfully demonstrated with the time resolution of 10μsec and the throughput of 1kHz.
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