Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection
The dynamics of the movement of gas is discussed for two-chambered polarized 3He target cells of the sort that have been used successfully for many electron-scattering experiments. A detailed analysis is presented showing that diffusion is a limiting factor in target performance, particularly as the...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/72087 |
| _version_ | 1826212487820738560 |
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| author | Kelleher, Aidan Michael Averett, T. Dolph, P. A. M. Mooney, K. E. Nelyubin, V. Singh, J. Tobias, W. A. |
| author2 | Kelleher, Aidan Michael |
| author_facet | Kelleher, Aidan Michael Kelleher, Aidan Michael Averett, T. Dolph, P. A. M. Mooney, K. E. Nelyubin, V. Singh, J. Tobias, W. A. |
| author_sort | Kelleher, Aidan Michael |
| collection | MIT |
| description | The dynamics of the movement of gas is discussed for two-chambered polarized 3He target cells of the sort that have been used successfully for many electron-scattering experiments. A detailed analysis is presented showing that diffusion is a limiting factor in target performance, particularly as these targets are run at increasingly high luminosities. Measurements are presented on a new prototype polarized 3He target cell in which the movement of gas is due largely to convection instead of diffusion. Nuclear magnetic resonance tagging techniques have been used to visualize the gas flow, showing velocities along a cylindrically shaped target of between 5 and 80 cm/min. The new target design addresses one of the principle obstacles to running polarized 3He targets at substantially higher luminosities while simultaneously providing new flexibility in target geometry. |
| first_indexed | 2024-09-23T15:22:57Z |
| format | Article |
| id | mit-1721.1/72087 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:22:57Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/720872022-10-02T02:31:47Z Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection Kelleher, Aidan Michael Averett, T. Dolph, P. A. M. Mooney, K. E. Nelyubin, V. Singh, J. Tobias, W. A. Kelleher, Aidan Michael Kelleher, Aidan Michael The dynamics of the movement of gas is discussed for two-chambered polarized 3He target cells of the sort that have been used successfully for many electron-scattering experiments. A detailed analysis is presented showing that diffusion is a limiting factor in target performance, particularly as these targets are run at increasingly high luminosities. Measurements are presented on a new prototype polarized 3He target cell in which the movement of gas is due largely to convection instead of diffusion. Nuclear magnetic resonance tagging techniques have been used to visualize the gas flow, showing velocities along a cylindrically shaped target of between 5 and 80 cm/min. The new target design addresses one of the principle obstacles to running polarized 3He targets at substantially higher luminosities while simultaneously providing new flexibility in target geometry. United States. Dept. of Energy (contract nos. DE-FG02-01ER41168 and DE-AC05-060R23177) 2012-08-10T12:49:26Z 2012-08-10T12:49:26Z 2011-12 2011-07 Article http://purl.org/eprint/type/JournalArticle 0556-2813 1089-490X http://hdl.handle.net/1721.1/72087 Dolph, P. A. M. et al. “Gas Dynamics in High-luminosity Polarized ^{3}He Targets Using Diffusion and Convection.” Physical Review C 84.6 (2011): 065201. © 2011 American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevC.84.065201 Physical Review C Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Kelleher, Aidan Michael Averett, T. Dolph, P. A. M. Mooney, K. E. Nelyubin, V. Singh, J. Tobias, W. A. Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection |
| title | Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection |
| title_full | Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection |
| title_fullStr | Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection |
| title_full_unstemmed | Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection |
| title_short | Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection |
| title_sort | gas dynamics in high luminosity polarized 3he targets using diffusion and convection |
| url | http://hdl.handle.net/1721.1/72087 |
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