Title

The electron calorimeter (ECAL) long duration balloon experiment

Document Type

Conference Proceeding

Publication Date

1-1-2007

Abstract

Accurate measurements of the cosmic ray electron energy spectrum in the energy region 50 GeV to greater than 1 TeV may reveal structure caused by the annihilation of exotic dark matter particles and/or individual cosmic ray sources. Here we describe a new long duration balloon (LDB) experiment, ECAL, optimized to directly measure cosmic ray electrons up to several TeV. ECAL includes a double layer silicon matrix, a scintillating optical fiber track imager, a neutron detector and a fully active calorimeter to identify more than 90% of the incident electrons with an energy resolution of about 1.7% while misidentifying only 1 in 200,000 protons and 0.8% of secondary gamma rays as electrons. Two ECAL flights in Antarctica are planned for a total exposure of 50 days with the first flight anticipated for December 2009.

Publication Source (Journal or Book title)

Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007

First Page

405

Last Page

408

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