Telescope Array Project: Difference between revisions

Revision as of 23:06, 20 March 2013

Revision as of 01:03, 21 March 2013

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[[Image:BRM-FD-open.jpg|thumb|200px|right|a view of the Black Rock Mesa FD site with the doors open]]

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The Telescope Array has three fluorescence detectortelescope stations. The stations are located on a triangle about 35&nbsp;km apart from one another. Each station has 12-14 telescopes viewing the range from 3 to 33 degrees in elevation. The three sites are named ''Black Rock Mesa'' (BRM), ''Long Ridge'' (LR), and ''Middle Drum'' (MD).<ref>http://www.telescopearray.org/index.php/research/clear-sky-clocks</ref>

Each telescope is instrumented with a camera made up of 256 PMTs (photomultiplier tubes) which are sensitive to ultra violet light

generated by a cosmic ray air shower.

In 2013, 10 new telescopes were added to the Middle Drum (northern Telescope Array) site. These new telescopes look above the

original 14 telescopes at that site. Thus the site now views 3-59 degrees in elevation. By looking higher into the sky

the telescopes are now able to observe shower maximum for lower energy events, thus enabling the experiment to make chemical

composition and energy measurements over a much larger range of incident particle energies.

Each telescope has a fluorescence light camera made up of 256 PMTs.

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