Effects of simulated space proton environment on transmission of optical materials for the space telescope imaging spectrograph (STIS)

Jacob Becher; Walter B. Fowler

doi:10.1117/12.157843

1 October 1993 Effects of simulated space proton environment on transmission of optical materials for the space telescope imaging spectrograph

Jacob Becher, Walter B. Fowler

Author Affiliations +

Proceedings Volume 2019, Infrared Spaceborne Remote Sensing; (1993) https://doi.org/10.1117/12.157843
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Potential transmitting materials for the STIS mission are being considered for order sorters, in-flight calibration filters, detector windows and calibration lamps. In this paper we examine the changes in spectral transmission characteristics with radiation dosage during a mission lifetime. A radiation environment for a 593 km altitude, 28 degree inclination orbit, for solar minimum and solar maximum, assuming a spherical shielding of 2 gms/cm² has been assumed. The dosage for protons is 0.392 Krad (Al)/Yr. and 0.217 Krad (Al)/Yr. for solar minimum and solar maximum respectively. To simulate the mission radiation environment Harvard Cyclotron Laboratory (HCL) has been used. Spectral transmission was measured between 210 nm and 3200 nm using a Perkin Elmer Lambda 9 monochromator. Below 210 nm a one meter McPherson vacuum monochromator was used. Transmission curves for all samples were obtained before irradiation and compared for equality in transmission.

Citation Download Citation

Jacob Becher and Walter B. Fowler "Effects of simulated space proton environment on transmission of optical materials for the space telescope imaging spectrograph", Proc. SPIE 2019, Infrared Spaceborne Remote Sensing, (1 October 1993); https://doi.org/10.1117/12.157843

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