An imaging system for EAS optical emission

Autor:	K. Greisen, A. N. Bunner, P. B. Landecker
Rok vydání:	1968
Předmět:	Physics Photomultiplier business.industry media_common.quotation_subject Night sky General Physics and Astronomy Astronomy Fresnel lens Cosmic ray law.invention Lens (optics) Optics Sky law Focal surface business Cherenkov radiation media_common
Zdroj:	Canadian Journal of Physics. 46:S266-S269
ISSN:	1208-6045 0008-4204
Popis:	The Cornell University Cosmic Ray Group is pursuing an experimental attack on the problem of detecting and analyzing ultra-high-energy air showers by the optical emission m the atmosphere. A technique has been developed to record pulses of light from a sequence of adjacent positions in the night sky, by imaging a sector of the sky onto a mosaic of photomultiplier tubes nested in the focal surface of a large Fresnel lens. Sixteen such lens units are then necessary to view a full 2π steradians. It is shown that, in the wavelength region 3 400 to 4 500 Å, Cerenkov radiation dominates the first 23° from the point of appearance of the shower, while nitrogen fluorescence allows tracking of the shower beyond 23°.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::24d8f0cfb1da7faba8dad738ef1e3ecc https://doi.org/10.1139/p68-225 Zobrazit plný text záznamu