An extreme ultraviolet radiation source for the simulation of the ionosphere

An extreme ultraviolet radiation source for the simulation of the ionosphere

An extreme ultraviolet (EUV) radiation source for space simulation of plasma and other related phenomena in the laboratory has been developed. A total of forty‐eight small EUV lamps are put together to give a radiation diameter of more than 30 cm. The intensity of this lamp at the hydrogen Lyman‐alp...

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Veröffentlicht in:Review of scientific instruments 1991-07, Vol.62 (7), p.1721-1726
Hauptverfasser: Oyama, K.‐I., Suzuki, K., Kawashima, N., Zalpuri, K. S., Teii, S., Nakamura, Y.
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Atmospheric optics
Earth, ocean, space
Exact sciences and technology
External geophysics
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container_end_page 1726
container_issue 7
container_start_page 1721
container_title Review of scientific instruments
container_volume 62
creator Oyama, K.‐I.
Suzuki, K.
Kawashima, N.
Zalpuri, K. S.
Teii, S.
Nakamura, Y.
description An extreme ultraviolet (EUV) radiation source for space simulation of plasma and other related phenomena in the laboratory has been developed. A total of forty‐eight small EUV lamps are put together to give a radiation diameter of more than 30 cm. The intensity of this lamp at the hydrogen Lyman‐alpha line is more than twenty five times stronger than sunlight at the same wavelength and at a distance of about 30 cm from the source. The source is capable of emitting EUV radiations from 110 nm to the longer wavelengths, either continuously or in pulses, and has been used to produce a plasma of 105 els/cm3 when the pressure of NO gas in the chamber was 10−4 Torr. Since this plasma is extremely calm and fairly Maxwellian, it can be used to study the electron collection mechanism of a probe in a collision dominant medium. The source was also utilized to study the interaction between vibrationally excited nitrogen molecules and thermal electrons.
doi_str_mv 10.1063/1.1142412
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1089-7623
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subjects Atmospheric optics
Earth, ocean, space
Exact sciences and technology
External geophysics
title An extreme ultraviolet radiation source for the simulation of the ionosphere
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