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The Genesis Solar Wind Concentrator

Nordholt, Jane E. and Wiens, Roger C. and Abeyta, Rudy A. and Baldonado, Juan R. and Burnett, Donald S. and Casey, Patrick and Everett, Daniel T. and Kroesche, Joseph and Lockhart, Walter L. and MacNeal, Paul and McComas, David J. and Mietz, Donald E. and Moses, Ronald W., Jr. and Neugebauer, Marcia and Poths, Jane and Reisenfeld, Daniel B. and Storms, Steven A. and Urdiales, Carlos (2003) The Genesis Solar Wind Concentrator. Space Science Reviews, 105 (3-4). pp. 561-599. ISSN 0038-6308. doi:10.1023/A:1024422011514.

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The primary goal of the Genesis Mission is to collect solar wind ions and, from their analysis, establish key isotopic ratios that will help constrain models of solar nebula formation and evolution. The ratios of primary interest include ^(17)O/^(16)O and ^(18)O/^(16)O to ±0.1%, ^(15)N/^(14)N to ±1%, and the Li, Be, and B elemental and isotopic abundances. The required accuracies in N and O ratios cannot be achieved without concentrating the solar wind and implanting it into low-background target materials that are returned to Earth for analysis. The Genesis Concentrator is designed to concentrate the heavy ion flux from the solar wind by an average factor of at least 20 and implant it into a target of ultra-pure, well-characterized materials. High-transparency grids held at high voltages are used near the aperture to reject >90% of the protons, avoiding damage to the target. Another set of grids and applied voltages are used to accelerate and focus the remaining ions to implant into the target. The design uses an energy-independent parabolic ion mirror to focus ions onto a 6.2 cm diameter target of materials selected to contain levels of O and other elements of interest established and documented to be below 10% of the levels expected from the concentrated solar wind. To optimize the concentration of the ions, voltages are constantly adjusted based on real-time solar wind speed and temperature measurements from the Genesis ion monitor. Construction of the Concentrator required new developments in ion optics; materials; and instrument testing and handling.

Item Type:Article
Related URLs:
URLURL TypeDescription
Wiens, Roger C.0000-0002-3409-7344
Burnett, Donald S.0000-0001-9521-8675
McComas, David J.0000-0001-6160-1158
Reisenfeld, Daniel B.0000-0003-1874-9450
Additional Information:© 2003 Kluwer Academic Publishers. Received 15 December 2001; Accepted in final form 21 May 2002. The authors would like to acknowledge NASA contract number W-19,272 for supporting this work. The design, development, and construction of the Concentrator would not have been possible without the help of many individuals. The authors would like to thank the following outstanding individuals: Diane Albert, Frank Ameduri, Matt Anderson, Richard Bramlett, Randy Edwards, Brian Henneke, James Lake, and Stacy Rupiper of Los Alamos National Laboratory; Dennis Guerrero, Irene Arevalos, Greg Dirks, Jeff Roese, Toby Stecklein, Jack Taguiam, Syrrel Rogillio, and James Sanders of the Southwest Research Institute; Chet Sasaki, Virgil Mireles and Don Sevilla of the Jet Propulsion Laboratory; Lada Adamac of Caltech; Allen Dorn of Screen Technology Group; Jerry Spieckerman of Marketech, Inc.; Steve Good of Reynolds Industries, Inc.; Kenneth Bedard formerly of Precimeter, Inc.; and David King and Joseph Maciejewsky of Technology Assessment and Transfer, Inc., Wear Sciences Division.
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Issue or Number:3-4
Record Number:CaltechAUTHORS:20150507-150031683
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Official Citation:Nordholt, J., Wiens, R., Abeyta, R., Baldonado, J., Burnett, D., Casey, P., . . . Urdiales, C. (2003). The Genesis Solar Wind Concentrator. Space Science Reviews, 105(3-4), 561-599. doi: 10.1023/a:1024422011514
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57349
Deposited On:08 May 2015 03:56
Last Modified:10 Nov 2021 21:11

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