Abstract
Future space experiments dedicated to the observation of high-energy gamma and cosmic rays will increasingly rely on a highly performing calorimetry apparatus, and their physics performance will be primarily determined by the geometrical dimensions and the energy resolution of the calorimeter deployed. Thus it is extremely important to optimize its geometrical acceptance, the granularity, and its absorption depth for the measurement of the particle energy with respect to the total mass of the apparatus which is the most important constraint for a space launch. The proposed design tries to satisfy these criteria while staying within a total mass budget of about 1.6 tons. Calocube is a homogeneous calorimeter instrumented with Cesium iodide (CsI) crystals, whose geometry is cubic and isotropic, so as to detect particles arriving from every direction in space, thus maximizing the acceptance; granularity is obtained by filling the cubic volume with small cubic CsI crystals. The total radiation length in any direction is more than adequate for optimal electromagnetic particle identification and energy measurement, whilst the interaction length is at least suficient to allow a precise reconstruction of hadronic showers. Optimal values for the size of the crystals and spacing among them have been studied. The design forms the basis of a three-year R&D activity which has been approved and financed by INFN. An overall description of the system, as well as results from preliminary tests on particle beams will be described.
Highlights
The geometrical acceptance of conventional cosmic-ray telescopes is limited by their ability to detect only particles impinging on one face of the apparatus
To improve the energy resolution for hadronic showers we plan to study advanced compensation techniques that rely both on the measurement of the fraction of electromagnetic energy of the shower through the detection of the Cherenkov light, and on the detection of neutrons which are produced in hadronic interactions within the shower
An innovative calorimetric solution for direct measurements of high-energy cosmic rays in space is being developed by the Calocube collaboration
Summary
CALOCUBE: an approach to high-granularity and homogenous calorimetry for space based detectors. This content has been downloaded from IOPscience. Please scroll down to see the full text. Ser. 587 012029 (http://iopscience.iop.org/1742-6596/587/1/012029) View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 158.110.150.69 This content was downloaded on 25/07/2016 at 08:51 Please note that terms and conditions apply. 16th International Conference on Calorimetry in High Energy Physics (CALOR 2014)
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