| Project/Area Number |
16360110
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | HIGH ENERGY ACCERELATOR RESEARCH ORGANIZATION (KEK) |
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Principal Investigator |
HARUYAMA Tomiyoshi HIGH ENERGY ACCELERATOR RESEARCH ORG., INSTITUTE OF PARTICLE AND NUCLEAR STUDIES, PROFESSOR, 素粒子原子核研究所, 教授 (90181031)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Toshikazu CRYOGENIC SCIENCE CENTER, RESEARCH ASSOCIATE, 超伝導低温工学センター, 助手 (20162977)
SHINTOMI Takakazu HIGH ENERGY ACCELERATOR RESEARCH ORG., EMERITUS PROFESSOR, 名誉教授 (10016082)
LI Rui SUMITOMO HEAVY INDUSTRIES, LTD., RESERACHER, クライオユニット, 研究員
IKUSHIMA Yuki SUMITOMO HEAVY INDUSTRIES, LTD., RESERACHER, クライオユニット, 研究員
TOMARU Takayuki CRYOGENIC SCIENCE CENTER, RESEARCH ASSOCIATE, 超伝導低温工学センター, 助手 (80391712)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥10,500,000 (Direct Cost: ¥10,500,000)
Fiscal Year 2005: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥7,000,000 (Direct Cost: ¥7,000,000)
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| Keywords | NANO-LEVEL VIBRATION / PULSE TUBE CRYOCOOLER / VIBRATION CANCELLATION / ANTI-PHASE PRESSURE WAVE / REFRIGERATION |
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| Research Abstract |
An innovative method for canceling the vibration at the cold stage of a pulse tube cryocooler has been investigated. A thin stainless tube of 20 mm in diameter and 200 mm in length was used to fabricate a model pulse tube cryocooler. The vibration of the cold stage of model cryocooler was measured for proving a method of this innovative vibration cancellation. A model cryocooler consists of multi-pairs of pipes on the same cold stage. When a presented working gas is supplied with a proper phase shift to those pairs, the vibration of the cold stage can be cancelled. We made models of the pulse tube cryocooler with a single pipe, two pairs of pipes and three pairs of pipes. Compared with the single-pipe model, the six-pipe model shows about a 98% reduction of vibration without any additional structure for vibration isolation.
Then, we also made the regenerators with 500 sheets of stainless mesh # 100, and set up those components inside of the thin tube to realize the pulse tube cryocooler. The self-vibration canceling pulse tube cryocooler with two set of tube and regenerator was operated to verify cooling power. The cold stage was cooled down to 168 K as the lowest temperature by using a GM type helium compressor, digital circuits for anti-phase signal generation and the solenoid valves for pressure swing. In this condition, the model showed about a 70 % reduction of vibration. As the symmetry of two sets of pulse tube cryocooler is essential in this method, any asymmetric configuration could affect on effective vibration reduction.
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