| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We have developed electromagnetic calorimeters which aim to measure the bunch-by-bunch luminosity of the high-luminosity electron-positron colliding accelerator SuperKEKB. The calorimeters detect electromagnetic showers induced by photons or positrons from the radiative Bhabha scattering and extract bunch structure of the collisions from the timing distribution of the signals.
We have installed such two detectors near the two accelerator rings and have succeeded to detect the signals from beam-gas nuclear bremsstrahlung process at the test operation of the accelerator. We confirm the time resolution of the detector, about 0.7ns, is close to the aimed performance, finding that in the bunch structure of the beam signals. We also have a big achievement to take and analyze the data in an online manner.
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