| Project/Area Number |
07554012
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
物理学一般
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| Research Institution | UNIVERSITY OF ELECTRO COMMUNICATIONS |
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Principal Investigator |
SHIMIZU Kazuko (1996-1997) UNIV.OF ELECTRO-COMMUNICATIONS,DEP.OF APPLIED PHYS.&-CHEM,ASSOCL.PROF., 電気通信学部, 助教授 (30017446)
宅間 宏 (1995) 電気通信大学, レーザー極限技術研究センター, 教授 (70012200)
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| Co-Investigator(Kenkyū-buntansha) |
清水 和子 電気通信大学, 電気通信学部, 助教授 (30017446)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥11,000,000 (Direct Cost: ¥11,000,000)
Fiscal Year 1996: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1995: ¥7,600,000 (Direct Cost: ¥7,600,000)
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| Keywords | LASER COOLING / LASER TRAPPING / ATOM OPTICS / ATOM IMAGING / ATOMIC RATTERN / MICROWAVE LENS / 原子レンズ / 極低温原子 / レーザー冷却・トラップ |
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| Research Abstract |
We developed technique to control motion of ultra-cold neutral atoms through electric field. The atoms are generated from a room-temperature atomic beam by using lase-cooling and trapping technique. We developed an intense point atomic source. The configuration of the source is as follows. Slow metastable neon atomic beam is generated from an liquid-nitrogen cooled discharge tube, whose capillary is made of sapphire. The beam is then slowed by the Zeeman slower and is fed into a magneto-optical trap with high magnetic field gradient. At a field gradient of 400G/cm, the trap size was 30 microns. The slow atomic beam was generated by releasing the atoms in the trap by optical pumping. The coherent atomic flux of approximately 1000/s is achieved. We investigated also a method to compensate spherical aberration of microwave-cavity lens. It is shown that the atomic beam diameter can be focused to 1/1000th of the incoming beam size by combining a concave lens in TM110 mode with a TM010 mode cavity that works as a convex lens.
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