Evaporative cooling of spin-polarized atomic hydrogen
A gas hydrogen atoms, confined in a static magnetic trap, has been evaporatively cooled to temperatures of a few millikelvin. The initial trap configuration held the gas at 38 mK for as long as 5 h. Evaporative cooling reduced the temperature to 3.0 mK while maintaining the central density at 7.6 x...
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| Veröffentlicht in: | Phys. Rev. Lett.; (United States) 1988-08, Vol.61 (8), p.935-938 |
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| container_end_page | 938 |
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| container_issue | 8 |
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| container_title | Phys. Rev. Lett.; (United States) |
| container_volume | 61 |
| creator | MASUHARA, N DOYLE, J. M SANDBERG, J. C KLEPPNER, D GREYTAK, T. J HESS, H. F KOCHANSKI, G. P |
| description | A gas hydrogen atoms, confined in a static magnetic trap, has been evaporatively cooled to temperatures of a few millikelvin. The initial trap configuration held the gas at 38 mK for as long as 5 h. Evaporative cooling reduced the temperature to 3.0 mK while maintaining the central density at 7.6 x 10/sup 12/ cm/sup -3/. These values were determined by measurement of the rate of electronic spin relaxation and are in agreement with model calculations. Further cooling to 1 mK (inferred from the model) has been achieved. Measurements were made of the efficiency of the evaporative cooling process. |
| doi_str_mv | 10.1103/physrevlett.61.935 |
| format | Article |
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M ; SANDBERG, J. C ; KLEPPNER, D ; GREYTAK, T. J ; HESS, H. F ; KOCHANSKI, G. P</creator><creatorcontrib>MASUHARA, N ; DOYLE, J. M ; SANDBERG, J. C ; KLEPPNER, D ; GREYTAK, T. J ; HESS, H. F ; KOCHANSKI, G. P ; Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139</creatorcontrib><description>A gas hydrogen atoms, confined in a static magnetic trap, has been evaporatively cooled to temperatures of a few millikelvin. The initial trap configuration held the gas at 38 mK for as long as 5 h. Evaporative cooling reduced the temperature to 3.0 mK while maintaining the central density at 7.6 x 10/sup 12/ cm/sup -3/. These values were determined by measurement of the rate of electronic spin relaxation and are in agreement with model calculations. Further cooling to 1 mK (inferred from the model) has been achieved. 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These values were determined by measurement of the rate of electronic spin relaxation and are in agreement with model calculations. Further cooling to 1 mK (inferred from the model) has been achieved. Measurements were made of the efficiency of the evaporative cooling process.</description><subject>ATOMIC AND MOLECULAR PHYSICS</subject><subject>Atomic properties and interactions with photons</subject><subject>ATOMS</subject><subject>COOLING</subject><subject>DENSITY</subject><subject>ELEMENTS</subject><subject>EVAPORATIVE COOLING</subject><subject>Exact sciences and technology</subject><subject>HYDROGEN</subject><subject>HYPERFINE STRUCTURE</subject><subject>MAGNETIC FIELDS</subject><subject>NONMETALS</subject><subject>ORIENTATION</subject><subject>Photon interactions with atoms</subject><subject>PHYSICAL PROPERTIES 640302 -- Atomic, Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory</subject><subject>Physics</subject><subject>RELAXATION</subject><subject>SPIN ORIENTATION</subject><subject>TRAPPING</subject><subject>ULTRALOW TEMPERATURE</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNpNkEtLAzEUhYMoWh9_wIUM4sLN1NxkJo-lFF9QUETXIZPJ2Mh0MiZpof56Iy3i6i7Odw6XD6FzwFMATG_GxSYGu-5tSlMGU0nrPTQBzGXJAap9NMGYQikx5kfoOMZPjDEQJg7REeREVpxMUH231qMPOrm1LYz3vRs-Ct8VcXRDOfpeB_dt20Inv3SmWGza4D_scIoOOt1He7a7J-j9_u5t9ljOnx-eZrfz0uTxVFamAmoYASmaioiOgWk1VFxYxjrBpATKCCdNIwhvGLetrQ1QXNc1JhpjTU_Q5XbXx-RUNC5ZszB-GKxJikkmCaUZut5CY_BfKxuTWrpobN_rwfpVVCBqSZisBM4o2aIm-JjddWoMbqnDRgFWv07VS3b6atfz7FQxUNlpLl3s9lfN0rb_KluJGbjaAToa3XdBD8bFPy7_ySUT9AdPFoBB</recordid><startdate>19880822</startdate><enddate>19880822</enddate><creator>MASUHARA, N</creator><creator>DOYLE, J. 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M</creatorcontrib><creatorcontrib>SANDBERG, J. C</creatorcontrib><creatorcontrib>KLEPPNER, D</creatorcontrib><creatorcontrib>GREYTAK, T. J</creatorcontrib><creatorcontrib>HESS, H. F</creatorcontrib><creatorcontrib>KOCHANSKI, G. P</creatorcontrib><creatorcontrib>Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Phys. Rev. Lett.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MASUHARA, N</au><au>DOYLE, J. M</au><au>SANDBERG, J. C</au><au>KLEPPNER, D</au><au>GREYTAK, T. J</au><au>HESS, H. F</au><au>KOCHANSKI, G. 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| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Phys. Rev. Lett.; (United States), 1988-08, Vol.61 (8), p.935-938 |
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| language | eng |
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| source | American Physical Society Journals |
| subjects | ATOMIC AND MOLECULAR PHYSICS Atomic properties and interactions with photons ATOMS COOLING DENSITY ELEMENTS EVAPORATIVE COOLING Exact sciences and technology HYDROGEN HYPERFINE STRUCTURE MAGNETIC FIELDS NONMETALS ORIENTATION Photon interactions with atoms PHYSICAL PROPERTIES 640302 -- Atomic, Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory Physics RELAXATION SPIN ORIENTATION TRAPPING ULTRALOW TEMPERATURE |
| title | Evaporative cooling of spin-polarized atomic hydrogen |
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