Solar telescopes filled with helium

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Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..526e&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Aug.-Sept. 1981, p. 526, 527.

Computer Science

Performance

1

Helium, Optical Paths, Telescopes, Gas Pressure, Heat Flux, Performance Tests, Solar Observatories, Thermal Absorption

Scientific paper

An experiment has been carried out in order to investigate the qualities of He in an optical path. It is shown that He gas may absorb a heat flux more than 30 times larger than air to produce the same optical effects. The factor increases to about 100 at 0.5 atmospheric pressure. The result supports an earlier suggestion that helium in the telescope light pass will substantially improve the internal seeing.

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