Accession Number:

AD0657155

Title:

RADIATION DAMAGE TO ORBITING SOLAR CELLS AND TRANSISTORS

Descriptive Note:

Technical memo.

Corporate Author:

JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Report Date:

1967-03-01

Pagination or Media Count:

33.0

Abstract:

In-flight solar cell degradation studies began with the launching of the 1961-01 satellite on June 29, 1961. Similar experiments were flown on the 1961-alpha eta and 1961-alpha eta 2 satellites. Data obtained from these satellites cover a time period both before and after Operation Starfish on July 9, 1962. Subsequently solar cell and electronic experiments were flown on satellites 1962-beta eta, ANNA I-B, 1963-38C, and 1964-83C. The data indicate that the damage to solar cells in a 1000 km orbit during the early months after Operation Starfish may not have been mostly a result of fission spectrum electrons. Although many energetic electrons were introduced into the inner belt, it is indicated that some high energy 4.5 mev protons were redistributed to altitudes including 1000 km. The results of flight experiments indicate that optimum power-to-weight ratio solar arrays will be obtained by use of N-on-P solar cells with 6 mil glass covers.

Subject Categories:

  • Electrical and Electronic Equipment
  • Electric Power Production and Distribution
  • Radioactivity, Radioactive Wastes and Fission Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE