Published November 1978
| Version Published
Journal Article
Open
The radial diffusion coefficient of 1.3 - 2.3 MeV protons in recurrent proton streams
Creators
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.
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.Attached Files
Published - grl892.pdf
Files
grl892.pdf
Additional details
Identifiers
- Eprint ID
- 43682
- Resolver ID
- CaltechAUTHORS:20140206-074805126
Funding
- NASA
- NAS5-11066
- NASA
- NGR 05-002-160
Dates
- Created
-
2014-02-06Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Space Radiation Laboratory , Physics Department
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 1978-01