Accession Number:

AD0766408

Title:

Geomagnetically Trapped Alpha Particles. The Inner Zone.

Descriptive Note:

Rept for May 73-Feb 73,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Report Date:

1973-09-28

Pagination or Media Count:

37.0

Abstract:

The inner-zone population of trapped alpha particles in the energy range 2.14-9.0 MeV was measured during 1969. The measurements show that inner-zone alpha particles are strongly peaked in pitch angle and the intensity decreases rapidly with decreasing L value. The alpha-particle spectra are flat and closely resemble inner-zone proton spectra at comparable energies. The alphap ratio is roughly independent of L 1.6 approximately L approximately 2.0and energy 0.293-1.14 MeVnucleon and is approximately 1-4 X 0.001. The computed alpha-particle distribution function strongly suggests that the inner zone is populated by alpha particles which diffuse inward conserving M and J. A value of the diffusion coefficient is derived, DLL 1.2 x 10 to the minus 8th power L to the 10th powerday, which is in good agreement with earlier proton studies. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE