Conference Presentation

PUBDB-2016-06575

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png DHCAL with Minimal Absorber : Measurements with Positrons

Neubueser, C. (Corresponding author)DESY* ; Freund, B. ; Repond, J.

2016

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Please use a persistent id in citations: doi:10.3204/PUBDB-2016-06575

Abstract: The CALICE Digital Hadron Calorimeter (DHCAL) is a highly-granular 1 m3 large prototype, based on Resistive Plate Chambers (RPCs) with digital readout of 1×1 cm2 pads. In special tests, 50 of its active layers were exposed to low energy particle beams, without interleaved absorber plates. The thickness of each layer corresponded approximately to 0.29 radiation lengths or 0.034 nuclear interaction lengths, defined mostly by the copper and steel skins of the detector cassettes. The results of the measurements performed at the Fermilab test beam with positrons in the energy range of 1 to 10 GeV will be presented and compared to simulations based on GEANT4. It is found that the default GEANT4 simulation of electromagnetic showers is not able to reproduce themeasurements of the energy resolution and the detailed shower shapes. With the use of the so-called 'Option 3' or '\_EMY' good to excellent agreement is obtained.

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Contributing Institute(s):

1. Experimente an Lepton Collidern (FLC)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF3-613) (POF3-613)

Experiment(s):

1. No specific instrument

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Database coverage:

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