| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
We have newly developed a graphite calorimeter for clinical electron beams. This graphite calorimeter has a thin graphite entrance window to detect clinical electron beams. The thin graphite window is specially designed for this graphite calorimeter, and is coated with a high density graphite layer by using CVD (chemical vapor deposition) method. Consequently, the core (absorber) of the calorimeter is successfully positioned shallower than the depth of dose maximum of 6 MeV electron beams. We tested the graphite calorimeter by external electrical power measurements. The results show that the graphite calorimeter can measure external power of 70 μW with a standard deviation of about 5 μW.
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