Computer Science – Sound
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apopt..23.2327c&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 23, July 15, 1984, p. 2327-2332.
Computer Science
Sound
16
Extreme Ultraviolet Radiation, Flux Quantization, Solar Flux, Solar Instruments, Error Analysis, Ionization Chambers, Neon, Sounding Rockets
Scientific paper
A windowless rare-gas ionization chamber has been developed to measure the absolute value of the solar extreme UV flux in the 50-575-A region. Successful results were obtained on a solar-pointing sounding rocket. The ionization chamber, operated in total absorption, is an inherently stable absolute detector of ionizing UV radiation and was designed to be independent of effects from secondary ionization and gas effusion. The net error of the measurement is + or - 7.3 percent, which is primarily due to residual outgassing in the instrument, other errors such as multiple ionization, photoelectron collection, and extrapolation to the zero atmospheric optical depth being small in comparison. For the day of the flight, Aug. 10, 1982, the solar irradiance (50-575 A), normalized to unit solar distance, was found to be 5.71 + or - 0.42 x 10 to the 10th photons per sq cm sec.
Carlson Richard W.
Judge Darrell L.
Ogawa Howard S.
Phillips Edward
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