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Your search keyword '"Ultraviolet astronomy -- Equipment and supplies"' showing total 9 results
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9 results on '"Ultraviolet astronomy -- Equipment and supplies"'

1. High-wavelength-resolution extreme-ultraviolet multilayer mirror

Author

Nagata, Shin'ichi, Tsuneta, Saku, Sakao, Taro, Yoshida, Tsuyoshi, Hara, Hirohisa, Kano, Ryouhei, Ishiyama, Wakana, Murakami, Katsuhiko, and Ohtan, Masayuki

Subjects
Mirrors -- Research, Silicon carbide -- Usage, Ultraviolet astronomy -- Equipment and supplies, Astronomy, Physics
Abstract

Multilayer mirrors with a system wavelength resolution ([Lambda]/[Delta][Lambda]) as high as 30-50 are required for the diagnostics of cosmic plasmas with temperatures of 1-20 MK. Such a high wavelength resolution can be realized by increasing the number of layer pairs contributing to the reflectance, by selecting less-absorbing materials for both the reflector and the spacer, and by decreasing the thickness of the reflector. We have fabricated a multilayer mirror tuned to 284 [Angstrom] with a silicon carbide reflector (20% thickness of the layer period) and an aluminum spacer and achieved [Lambda]/[Delta][Lambda] [similar to] 26.8 with a peak reflectivity of [approximately]13.0%. This wavelength resolution is close to the value obtained with a numerical simulation and is considerably higher than the value obtained with the conventional Mo/Si multilayer. Key words: Extreme-ultraviolet optics, multilayer, silicon-carbide, plasma diagnostics, astrophysical plasma.

Published
1997

4. Ultraviolet-visible spectrograph optics: ODIN project

Author

Powell, Ian and Bewsher, Amanda

Subjects
Spectrograph -- Design and construction, Ultraviolet astronomy -- Equipment and supplies, Ultraviolet spectroscopy -- Equipment and supplies, Astronomy, Physics
Published
1995

5. UV space telescope will provide new capabilities

Author

Brosch, Noah and Topaz, Jeremy

Subjects
Ultraviolet astronomy -- Equipment and supplies, Telescope -- Design and construction, Business, Electronics and electrical industries
Abstract

Following the successful launching of two 'Ofek' satellites in 1988 and 1990, a satellite-borne UV astronomical telescope is being planned as Israel's first scientific space venture. Although the satellite will [...]

Published
1991

6. An old friend in a new light

Author

Hodge, Paul

Subjects
Andromeda (Nebula) -- Discovery and exploration -- Equipment and supplies, Ultraviolet astronomy -- Equipment and supplies, Astronomy, Discovery and exploration, Usage, Equipment and supplies
Abstract

OUR KNOWLEDGE of the ultraviolet universe remained meager until telescopes could be launched into space, since these short wavelengths of light are largely absorbed by Earth's atmosphere. Ultraviolet astronomy now [...]

Published
2004

7. Technical problems plague $150-million astronomy mission

Author

McDonald, Kim A.

Subjects
Columbia (Space shuttle) -- Equipment and supplies, Supernova remnants -- Observations, Quasars -- Observations, Telescope -- Maintenance and repair, Ultraviolet astronomy -- Equipment and supplies, Education
Published
1990

8. Mission 67 to study ultraviolet targets

Author

McKenna, James T.

Subjects
Space shuttles -- Planning, Ultraviolet astronomy -- Equipment and supplies, Astronautics in astronomy -- Equipment and supplies, Aerospace and defense industries, Business, Transportation industry
Abstract

The ultraviolet astronomy devices of the Astro 2 scientific spacecraft figure prominently in NASA's plans for the upcoming Endeavor space shuttle mission, which is set for a Mar 2, 1995, launch date. Mission 67 will be Astro 2's second flight.

Published
1995

9. Extreme Ultraviolet Explorer shipped to Cape Canaveral for May launch

Subjects
Extreme Ultraviolet Explorer (Artificial satellite) -- Design and construction, Ultraviolet astronomy -- Equipment and supplies, Artificial satellites -- Launching, Business, Electronics and electrical industries, Engineering and manufacturing industries
Published
1992

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