Gamma-ray measurements from the space shuttle during a solar flare

Haskins, P.S.; McKisson, J.; Weisenberger, A.G.; Ely, D.W.; Ballard, T.A.; Dyer, C. S.; Truscott, P.R.; Piercey, R. B.; Ramayya, A. V.

doi:10.1016/0273-1177(92)90124-g

Cited by 7 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well known that optical elements that are placed into orbit around the Earth experience harsh radiation environments that originate from trapped-particle belts, cosmic rays, and solar events 9 . Of particular interest to optical materials is the continuous flux of energetic protons, hard x-rays, and gamma photons that the materials encounter 9,10 . These types of radiation exposures lead to the excitation of electrons and the subsequent formation of color centers in the materials 7,11 .…”

Section: Introductionmentioning

confidence: 99%

Gamma radiation effects in Yb-doped optical fiber

Philip

Schneider

Simmons-Potter

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

View full text Add to dashboard Cite

Determination of the radiation response of doped-fiber laser materials, systems and components to relevant ionizing radiation fluxes is central to the prediction of long-term fiber-based laser performance/survivability in adverse and/or space-based environments. It is well known that optical elements that are placed into orbit around the Earth experience harsh radiation environments that originate from trapped-particle belts, cosmic rays, and solar events. Of particular interest to optical materials is the continuous flux of gamma photons that the materials encounter. Such radiation exposure commonly leads to the formation of color centers in a broad range of optical materials. Such color center formation gives rise to changes in optical transmission, loss and luminescent band structure, and, thus, impacts long-term optical device performance.In this paper we will present the results of our investigation of gamma-radiation-induced photodarkening on the passive optical transmittance of a number of ytterbium-(Yb-) doped optical fibers. We will discuss the evolution of the optical response of the fiber across the 1.0 to 1.6 micron wavelength window with increasing gamma exposure. Results indicate that these fibers exhibit reasonable radiation resistance to gamma exposures typical of a 5-year, low-earth-orbit environment. Maximum transmittance losses of less than 10% were observed for total gamma exposures of 2-5 krad (Si).

show abstract

Section: Introductionmentioning

confidence: 99%

Gamma radiation effects in Yb-doped optical fiber

Philip

Schneider

Simmons-Potter

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

View full text Add to dashboard Cite

show abstract

“…During the last high latitude passage (south) for the SAM measurement the detector recorded gamma-ray flux levels that exceed all but one of the preceding S A A passages. While it is likely that those fluxes were primarily due to electron bremsstrahlung, there may also be a contribution from the secondary reaction products from high energy protons [9].…”

Section: Pre-flight Measurementsmentioning

confidence: 99%

Performance Of A BGO Detector In Low Earth Orbit

Haskins¹,

McKisson²,

Ely³

et al.

1990 IEEE Nuclear Science Symposium Conference Record

Self Cite

View full text Add to dashboard Cite

A 7.6 cm x 7.6 cm BGO detector was flown in the middeck of the Space Shuttle Columbia August 8-13, 1989 as part of the Shuttle Activation Monitor ( S A M ) experiment. One of the goals of this experiment was to compare the performance of the BGO to that of NaI in the same environment. Twentyfour hours of data in five-minute time bins were recorded with each detector in each of two locations in a high-inclination orbit (57", 300 km). h e -and post-flight low background counting was performed for identification of induced activities produced due to the exposure to the space radiation environment.

show abstract