NSSDCA ID: 2007-004E-03
Mission Name: THEMIS-EThe solid state telescope (SST) measures the super-thermal part of the ion and electron distributions. It was built by UCB following the heritage of the earlier ISEE1/2/3 instruments and identical to the SST telescope pairs flown on WIND. Each probe carries two such pairs. Each double-ended telescope unit is equipped with three stacked, fully depleted, passivated, ion-implanted, 1.5 cm2 silicon detectors. The center (T) detector is 500 m thick, while the outside (O & F) detectors are 300 m thick. The two detector pairs are mounted such that two telescope units point on the spin plane (~ecliptic), one points above and the other below the spin-plane. The calibration prcedure is similar to the one used on WIND that led to superb agreement (<10% absolute flux uncertainty) between WIND SST and ESA fluxes. Inter-probe calibration will also be performed at times of low plasma sheet activity, when the flux anisotropy is low. The electronics are comprised of miniaturized hybrid electronics on a VLSI chip, developed for ESTEC for flight on the IMPACT/SEPT telescopes on Solar Stereo. The primary science goals for the SST are: 1) To perform remote sensing of the tailward-moving current disruption boundary (on satellites P3, P4, P5); 2) To measure the time-of-arrival of superthermal ions and electrons (30-300 keV, at 10s resolution or better) during injections, and ascertain the Rx onset time (P1, P2).
Questions and comments about this experiment can be directed to: Dr. Dieter K. Bilitza
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Christophe Philippe Escoubet | Co-Investigator | ESA-European Space Research and Technology Centre | cpescoub@estec.esa.nl |
Mr. Davin Larson | Co-Investigator | University of California, Berkeley | davin@ssl.berkeley.edu |