Model-data comparison of total dose experiment on KITSAT-1

Author

Kim, Sung-Joon ; Min, Kyoung-Wook ; Shin, Young-Hoon ; Seon, Jong-Ho

Author_Institution

Dept. of Phys., KAIST, South Korea

Volume

49

Issue

6

fYear

2002

fDate

12/1/2002 12:00:00 AM

Firstpage

2818

Lastpage

2821

Abstract

Using a model developed for temperature-dependent irradiations, we analyze the results of the KITSAT-1 total dose experiment (TDE) accumulated during more than two years from September 1992 through December 1994. Monte Carlo simulations are adopted for the calculation of effective shielding thickness of the spacecraft at the position of TDE. With parameters obtained from a laboratory Co⁸⁰ γ-ray experiment, the model reproduces the observed threshold voltage changes quite successfully, including peculiar oscillations caused by temperature variations. The total dose received by TDE is estimated to be about 40% larger than the NASA predictions, in general agreement with the APEXRAD model.

Keywords

MOSFET; Monte Carlo methods; artificial satellites; gamma-ray effects; semiconductor device models; space vehicle electronics; γ-ray experiment; APEXRAD model; Co; KITSAT-1; Monte Carlo simulations; effective shielding thickness; model-data comparison; observed threshold voltage changes; spacecraft; temperature variations; temperature-dependent irradiations; total dose experiment; Laboratories; Low earth orbit satellites; MOSFETs; NASA; Payloads; Physics; Predictive models; Space vehicles; Temperature; Threshold voltage;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2002.805344

Filename

1134226