New detecting techniques for a future calorimetry

16th International Conference on Calorimetry in High Energy Physics

Auffray, E.^1 ; Buganov, O.^2 ; Fedorov, A.^3 ; Korjik, M.^3 ; Lecoq, P.^1 ; Tamulaitis, G.^4 ; Tikhomirov, S.^2 ; Vasil'Ev, A.^5

CERN, Switzerland^1

Stepanov Institute of Physics, Belarus^2

Institute for Nuclear Problems, Belarus^3

Vilnius University, Lithuania^4

Scobeltcyn Institute of Nuclear Physics, Belarus^5

关键词: Electromagnetic calorimeter;    High energy physics experiments;    High-energy particles;    Pump-probe technique;    Scintillation crystals;    Scintillation materials;    Scintillation properties;    Two photon absorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/587/1/012056/pdf
DOI  :  10.1088/1742-6596/587/1/012056

来源: IOP

【 摘 要 】

In the last forty years, application of crystalline materials in homogeneous Electromagnetic Calorimeters has played a crucial role in the discovery of matter properties and promoted a continuous progress in the detecting technique. The detection systems progressed from small detectors based on NaI(Tl), CsI(Na), BaF2, PbF2, and Bi4Ge3O12to giant Electromagnetic Calorimeters of CMS, ALICE Collaborations at LHC and PANDA Collaboration at FAIR, where the systems consisted of thousands lead tungstate PbWO4scintillation crystals. Lead tungstate (PWO) became the most extensively used scintillation material in high energy physics experiments. PWO possesses a unique combination of scintillation properties including high energy and time resolutions in the detection of high energy particles. Here, we report on the results of the two photon absorption in PWO crystals obtained by pump-probe technique using ultra short laser pulses. The results demonstrate that the relaxation processes in PWO offer capability of this material to be used in detection systems to make a time stamp with precision close to 10-12s or even better.