Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Absolute measurement of the extreme UV solar flux

Not Accessible

Your library or personal account may give you access

Abstract

A windowless rare-gas ionization chamber has been developed to measure the absolute value of the solar extreme UV flux in the 50–575-Å 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 ±7.3%, 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, 10 Aug. 1982, the solar irradiance (50–575 Å), normalized to unit solar distance, was found to be 5.71 ± 0.42 × 1010 photons cm−2 sec−1.

© 1984 Optical Society of America

Full Article  |  PDF Article
More Like This
Absolute photon-flux measurements in the vacuum ultraviolet

James A. R. Samson and G. N. Haddad
J. Opt. Soc. Am. 64(1) 47-54 (1974)

Comparison of an Ionization Chamber and a Thermopile as Absolute Detectors in the Extreme Ultraviolet

L. R. Canfield, R. G. Johnson, K. Codling, and R. P. Madden
Appl. Opt. 6(11) 1886-1888 (1967)

New far UV detector calibration facility at the National Bureau of Standards

L. R. Canfield
Appl. Opt. 26(18) 3831-3837 (1987)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved