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Particle Flux Monitor (Spacecraft)

NSSDCA ID: 1978-012A-02

Mission Name: IUE
Principal Investigator:Dr. Carl O. Bostrom


The particle flux monitor experiment was placed in IUE to monitor the trapped electron fluxes that affected the sensitivity of the ultraviolet sensor in the IUE spectrograph package experiment, NSSDC ID 78-012A-01. The particle flux monitor was a lithium-drifted silicon detector with a half-angle conical field of view of 16 deg. It had an aluminum absorber of 0.357 g/sq cm in front of the collimator and a brass shield with a minimum thickness of 2.31 g/sq cm. The effective energy threshold for electron measurements was 1.3 MeV. The experiment was also sensitive to protons with energies greater than 15 MeV. The instrument was used as an operational tool to aid in determining background radiation and acceptable camera exposure time. The data were also useful as a monitor of the trapped radiation fluxes. The instrument was provided by Dr. C. Bostrom of the Applied Physics Laboratory. The instrument was turned off on October 4, 1991 because it was giving erroneous information.

Alternate Names

  • IUE/ParticleFluxMonitor_Spacecraft_

Facts in Brief

Mass: 0.565 kg
Power (avg): 1.1 W

Funding Agency

  • NASA-Office of Space Science (United States)


  • Space Physics: Magnetospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. Carl O. BostromPrincipal InvestigatorApplied Physics Laboratory

Selected References

  • Arquilla, R., A search for periodicities in the IUE daily peak radiation data, NASA IUE Newsletter #40, 160-173, Dec. 1990.
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