Performance of a spaghetti calorimeter prototype with tungsten absorber and garnet crystal fibres

Liupan An; Etiennette Auffray; Federico Betti; Frederik Dall'Omo; David Gascon; Andrey Golutvin; Yury Guz; Sergey Kholodenko; Loris Martinazzoli; José Mazorra De Cos; Eduardo Picatoste; Marco Pizzichemi; Philipp Roloff; Matteo Salomoni; David Sanchez; Andreas Schopper; Aleksandr Semennikov; Pavel Shatalov; Evgenii Shmanin; Daria Strekalina; Yanxi Zhang

doi:10.1016/j.nima.2022.167629

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arXiv · 2205.02500

Performance of a spaghetti calorimeter prototype with tungsten absorber and garnet crystal fibres

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Abstract

A spaghetti calorimeter (SPACAL) prototype with scintillating crystal fibres was assembled and tested with electron beams of energy from 1 to 5 GeV. The prototype comprised radiation-hard Cerium-doped Gd$_3$Al$_2$Ga$_3$O$_{12}$ (GAGG:Ce) and Y$_3$Al$_5$O$_{12}$ (YAG:Ce) embedded in a pure tungsten absorber. The energy resolution was studied as a function of the incidence angle of the beam and found to be of the order of $10\% / \sqrt{E} \oplus1\%$, in line with the LHCb Shashlik technology. The time resolution was measured with metal channel dynodes photomultipliers placed in contact with the fibres or coupled via a light guide, additionally testing an optical tape to glue the components. Time resolution of a few tens of picosecond was achieved for all the energies reaching down to (18.5 $\pm$ 0.2) ps at 5 GeV.

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Liupan An, Etiennette Auffray, Federico Betti, Frederik Dall'Omo, David Gascon, Andrey Golutvin, Yury Guz, Sergey Kholodenko, Loris Martinazzoli, José Mazorra De Cos, Eduardo Picatoste, Marco Pizzichemi, Philipp Roloff, Matteo Salomoni, David Sanchez, Andreas Schopper, Aleksandr Semennikov, Pavel Shatalov, Evgenii Shmanin, Daria Strekalina, Yanxi Zhang. 2022-05-05. Performance of a spaghetti calorimeter prototype with tungsten absorber and garnet crystal fibres. https://doi.org/10.1016/j.nima.2022.167629

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