Accession Number:

AD0757481

Title:

Computer Simulation of Ion Collection by an Ionospheric Probe.

Descriptive Note:

Final rept. 1 Dec 71-1 Jan 73,

Corporate Author:

TRW SYSTEMS GROUP REDONDO BEACH CALIF

Personal Author(s):

Report Date:

1973-01-01

Pagination or Media Count:

82.0

Abstract:

Monte Carlo calculations of positive ion collection by a flat faced cylindrical probe were carried out at speed ratio 1.5 over a range of lambda sub infinityD neutral molecule mean free pathcylinder diameter and lambda sub DD Debye lengthD at a fixed cylinder front face potential of -10 volts. Under collisionless conditions lambda sub infinity D it was found that for lambda sub DD 1.0 the ion flux to the front face stagnation point was approximately 35 times the field-free ion flux. The stagnation point ion flux decreased rapidly as lambda sub DD was reduced below 1.0, reaching a value of approximately 4 times the field free ion flux at lambda sub DD .03. The ion flux at lambda sub DD .03, when scaled to conditions for which flight data were available was found to be a factor of 4 higher than the flight measured flux. Author Modified Abstract

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE