Accession Number : ADA261729


Title :   Detailed Component Design for a Compact Environmental Anomaly Sensor (CEASE)


Descriptive Note : Scientific rept. no. 2


Corporate Author : AMPTEK INC BEDFORD MA


Personal Author(s) : Huber, Alan C ; McGarity, John O ; Okun, Paul ; Pantazis, John A ; Sperry, David


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261729.pdf


Report Date : 16 Nov 1992


Pagination or Media Count : 56


Abstract : As the size and sophistication of spacecraft have increased, anomalies in operational performance caused by the interaction of the energetic- particle population and the spacecraft have likewise increased. The Compact Environmental Anomaly Sensor (CEASE) is being developed as a small, low-power device to monitor space weather and provide autonomous warning of conditions that could cause operational anomalies. Based on the sensor-design and trade-off studies for CEASE, a dosimeter set consisting of solid-state detectors behind aluminum absorbers (of several thicknesses) has been chosen. The outputs of the detectors are fed into algorithms that warn of certain anomalies: (1) surface dielectric charging, (2) deep dielectric charging, (3) total radiation dose behind 0.035 g/cm to the 2nd power, (4) total dose behind 0.41 g/cm to the 2nd power, and (5) single event upsets. From seven quantities derived by algorithm processing, eight warning levels (1, 3, 100...3000 x base) are obtained for each of the five anomalies. Level flags can then be selected for a particular application. For such a CEASE instrument, we estimate a volume of 64 in to the 3rd power (4-inch cube), a weight of 2 pounds, and power dissipation of 2 watts.


Descriptors :   *ANOMALIES , *SPACECRAFT , *SPACECRAFT CHARGING , ALGORITHMS , DETECTORS , PLASMAS(PHYSICS) , DIELECTRICS , METAL OXIDE SEMICONDUCTORS , ELECTRONS , TELESCOPES , ELECTRIC CHARGE , RADIATION EFFECTS , RADIATION DOSAGE , DOSIMETERS , SOLAR ACTIVITY , PROTONS , FIELD EFFECT TRANSISTORS , ENERGY , MICROPROCESSORS , RADIATION , SIGNAL PROCESSING


Subject Categories : Optical Detection and Detectors
      Magnetic & Electric Fld Detection & Detectors
      Unmanned Spacecraft
      Manned Spacecraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE