A detailed test of the CsI(Tl) calorimeter for BELLE with photon beams of energy between 20 MeV and 5.4 GeV

Citation
H. Ikeda et al., A detailed test of the CsI(Tl) calorimeter for BELLE with photon beams of energy between 20 MeV and 5.4 GeV, NUCL INST A, 441(3), 2000, pp. 401-426
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
441
Issue
3
Year of publication
2000
Pages
401 - 426
Database
ISI
SICI code
0168-9002(20000301)441:3<401:ADTOTC>2.0.ZU;2-Y
Abstract
The results of a beam test of a prototype of the BELLE CsI(Te) calorimeter are reported. The test used beams of photons with energies spanning the ran ge from 20 MeV to 5.4 GeV, produced at ROKK-1M facility of the Budker Insti tute of Nuclear Physics. The single-counter energy-equivalent noise was mea sured to be similar to 200 keV. The design goals for the energy resolution, e.g. 4% at 20 MeV and 1.7% at 5.4 GeV, were achieved using the sum of ener gy deposits in a 5 x 5 crystal matrices with a single crystal energy thresh old of 0.5 MeV; the summed energy deposit measured in the array corresponds to 97 +/- 2% of the incident photon energy over the entire energy range. T he average position resolution for 470 MeV energy photons was measured to b e 8 mm. (C) 2000 Elsevier Science B.V. All rights reserved.