| Budget Amount *help |
¥41,990,000 (Direct Cost: ¥32,300,000、Indirect Cost: ¥9,690,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2015: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2014: ¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
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| Outline of Final Research Achievements |
Three sets of cryogenic sapphire-resonator oscillators (CSOs), have been developed to operate using cryo-refrigerators and low-vibration cryostats. The Allan deviation was evaluated through the three-cornered hat method, and was better than 2×10-15 for averaging times of 1 s to 1 day. Autonomous and continuous operation over a year without any frequency unlocking became possible. The first CSO is now used with our cesium atomic fountain frequency standard, which has achieved a nearly quantum-projection-noise-limited frequency stability of 8×10-14 at 1 second.
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