July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Photon Counting with a Fully Digital FDIRC (Focused Differential Internal Reflection Cherenkov)

Aug 1, 2015, 3:30 PM
Amazon Foyer (World Forum)

Amazon Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 154
Poster contribution CR-IN Poster 2 CR


Pier Simone Marrocchesi (University of Siena (IT) and INFN Pisa)


A prototype of an Internal Reflection Cherenkov, with a SiO2 (Fused Silica) radiator bar optically connected to a cylindrical mirror, was tested at CERN SPS in March 2015 with a beam of relativistic ions obtained from fragmentation of primary argon nuclei at energies 13 and 30 GeV/n. The detector, designed to identify cosmic nuclei, features an imaging focal plane of dimensions ~4 cm x 3 cm equipped with 16 arrays of NUV-SiPM (near-ultraviolet sensitive silicon photon avalanche detector) for a total of 1024 sensitive elements. The outstanding performance of the photodetectors (with negligible background between adjacent photopeaks), allowed to apply a photon counting technique to the Cherenkov light collected on the focal plane. Thanks to the fine granularity of the array elements, the Cherenkov pattern was recorded together with the total number of detected photoelectrons increasing as Z$^{2}$ as a function of the atomic number Z. In this paper, we report the performance of the SiPM arrays and the excellent resolution achieved by the Digital Cherenkov prototype in the charge identification of the elements present in the beam.
Registration number following "ICRC2015-I/" 615
Collaboration -- not specified --

Primary author

Pier Simone Marrocchesi (University of Siena (IT) and INFN Pisa)


Arta Sulaj (University of Siena and INFN Pisa (IT)) Caterina Checchia (Doctoral School Univ. of Siena) Francesco Stolzi (University of Siena and INFN Pisa) Gabriele Bigongiari (University of Siena and INFN Pisa (IT)) Gianmaria Collazuol (U) Jungeun Suh (Doctoral School University of Siena) Maria Grazia Bagliesi (University of Siena) Paolo Brogi (University of Siena and INFN Pisa) Paolo maestro (University of Siena and INFN Pisa) Simone Bonechi (University of Siena and INFN Pisa)

Presentation materials