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. doi:10.1029/GL005i011p00965. 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:

URL	URL Type	Description
http://dx.doi.org/10.1029/GL005i011p00965	DOI	Article
http://onlinelibrary.wiley.com/doi/10.1029/GL005i011p00965/abstract	Publisher	Article

ORCID:

Author	ORCID
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 Agency	Grant Number
NASA	NAS5-11066
NASA	NGR 05-002-160

Other Numbering System:

Other Numbering System Name	Other Numbering System ID
Space Radiation Laboratory	1978-01

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DOI:

10.1029/GL005i011p00965

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CaltechAUTHORS:20140206-074805126

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https://resolver.caltech.edu/CaltechAUTHORS:20140206-074805126

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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:

10 Nov 2021 16:41

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