Test of the uniformity of the response of CsI(Tl) crystals.

Details Test of the uniformity of the response of CsI(Tl) crystals. Test of the uniformity of the response of CsI(Tl) crystals.

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dnp.be009v&link_type=abstract

American Physical Society, 2002 Fall Meeting of the Division of Nuclear , abstract #BE.009

Physics

Scientific paper

The High Resolution Array (HiRA) is a new detector array which consists of 20 telescopes. Each telescope is comprised of 2 Si-strip detectors backed by 4 CsI(Tl) crystals. For this purpose we need 80 CsI(Tl) crystals which have very good uniform response across the surface of the crystal. In order to check the uniformity of each crystal we perform a scan on a 10x10 point grid with an collimated alpha source (5.5 MeV). This test measures the uniformity of response at the surface of the crystal. In experiments we will measure particles with much higher energies. These particles will penetrate much deeper into the crystal and the response may therefore be completely different. In order to validate the test with alpha source we compare the uniformity of response measured with 220 MeV, 110 MeV alpha's with those measured with the alpha source. This work is supported by the National Science Foundation under Grant No. NSF-PHY-01-10253

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