NSSDCA ID: 1976-003A-08
Mission Name: Helios-BThe detector complement of this experiment (E7) consisted of three separate delta E/delta x vs E telescopes and a proportional counter for monitoring solar X rays in the range 2-8 keV. The high-energy telescope had a geometric factor of 0.22 sq cm-sr and measured electrons in three ranges between 2 and 8 MeV, and protons and alpha particles in three ranges between 20 and 56 MeV/n. Protons above 230 MeV were also measured. The first low-energy telescope (geometric factor was 0.155 sq cm-sr) measured protons and z >1 particles in three ranges between 3 and 21 MeV/n. The second low-energy telescope (geometric factor was 0.015 sq cm-sr) measured protons in several ranges between 0.12 and 2.1 MeV, alpha particles in the ranges 0.6-2.1 and 6-21.2 MeV/n, and electrons in four ranges between 0.12 and 2 MeV. For a number of coincidence modes, counting data sectored into eight 45-deg sectors were obtained. The data cycle time was dependent on the spacecraft telemetry (variable between 4096 and 8 bits/s) and format. Under optimum conditions, five events per s are pulse-height analyzed and the rate data cycle was on the order of 5 min. At the slowest combination of bit rate and format, a complete data cycle required about 2.5 h. For further details see IEEE Trans. on Nuc. Sci., NS-22, p. 570, 1975, and pp. 258-260 of Raumfahrtforschung, v. 19, n. 5, 1975.
Questions and comments about this experiment can be directed to: Dr. H. Kent Hills
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Frank B. McDonald | Other Investigator | NASA Goddard Space Flight Center | |
Dr. Bonnard J. Teegarden | Other Investigator | NASA Goddard Space Flight Center | teegarden@tgrs.gsfc.nasa.gov |
Dr. Kenneth G. McCracken | Other Investigator | Commonwealth Scientific and Industrial Research Orqanisation | |
Dr. Edward C. Roelof | Other Investigator | Applied Physics Laboratory | edmond.roelof@jhuapl.edu |
Dr. James H. Trainor | Principal Investigator | NASA Goddard Space Flight Center |