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The radial diffusion coefficient of 1.3 - 2.3 MeV protons in recurrent proton streams

Mewaldt, R. A. and Stone, E. C. and Vogt, R. E. (1978) The radial diffusion coefficient of 1.3 - 2.3 MeV protons in recurrent proton streams. Geophysical Research Letters, 5 (11). pp. 965-968. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20140206-074805126

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Abstract

Direct estimates of the radial diffusion coefficient κ_(rr) for 1.3-2.3 MeV protons in interplanetary space are made by comparing simultaneous observations of the diffusive anisotropy and radial gradient of these particles within recurrent streams. The 1.3-2.3 MeV proton anisotropy has been measured at 1 AU by the Caltech Electron/Isotope Spectrometers on IMP-7 and 8 during recurrent proton events for which measurements of the radial intensity gradient have been reported. The resulting values for κ_(rr) near 1 AU range from (3 to 9) × 10^(20) cm^²/sec, corresponding to scattering mean free paths between 0.03 and 0.1 AU.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/GL005i011p00965DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/GL005i011p00965/abstractPublisherArticle
ORCID:
AuthorORCID
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Additional Information:© 1978 by the American Geophysical Union. Manuscript Accepted: 21 Sep 1978. Manuscript Received: 25 Jul 1978. We are grateful to H. S. Bridge and J. D. Sullivan for providing IMP-7 and 8 plasma data prior to publication. This work was supported in part by NASA under Contract NAS5-11066 and Grant NGR 05-002-160.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAS5-11066
NASANGR 05-002-160
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1978-01
Issue or Number:11
Record Number:CaltechAUTHORS:20140206-074805126
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140206-074805126
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43682
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Feb 2014 16:46
Last Modified:20 Feb 2020 14:33

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