The SDS Dosimeter.
Abstract
This report summarizes space-radiation dosimeter -3A, -1B, and -2B designed and tested by The Aerospace Corporation Space Sciences Laboratory to be flow aboard SDS satellites. Two circular surface barrier silicon detectors with a nominal 4.8 cu. m volume are located, with electronics, inside of the main mission electronics box. Each detector measures the total energy deposited in the depleted (active) volume by charged particles and photons. The detectors are passively cooled in order to keep the system noise well below the electronic energy threshold set at 66 keV. A backup instrument also with 66 keV threshold has been included in the system. A special gated integrating circuit associated with each of the detectors monitors the deposited energy, producing output pulses each of which corresponds to a dose of approx. 2,700,000 rads. The maximum measurable dose rate is 0.27 rads/sec. The minimum detectable dose rate is 5.4 x 10 to the -9th power rads/sec. The pulses are counted by a scaler whose contents are read out by the spacecraft telemetry system. Maximum storage capacity of the scaler corresponds to an accumulated dose of 0.185 megarad. The instrument package weighs 1 lb., 1.51 oz. and uses 0.360 watts of power. Only one dosimeter of the pair in the instrument package draws power at a given time. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1983
- Accession Number
- ADA124569
Entities
People
- Bernard Blake
- Donald R. Croley
- Norman Katz
- Sam S. Imamoto
Organizations
- The Aerospace Corporation