The LHCb electromagnetic calorimeter (ECAL) needs to be upgraded for Run 4 and 5, which will take place during the High-Luminosity phase of the Large Hadron Collider. The inner regions will be equipped with Spaghetti calorimeter (SpaCal) modules, using organic scintillating fibres in regions exposed to radiation doses of up to 200 kGy. A study has been carried out on plastic scintillators, focusing on green (3-hydroxyflavone (3HF)) and blue emitting plastic scintillators produced by ISMA in Kharkiv, Ukraine. Characterization of light yield, scintillation kinetics, and dedicated irradiation campaign have been performed, highlighting 3HF-based scintillators as promising candidates. In parallel, irradiation and ageing campaigns were performed on three Hamamatsu metal-channel dynode photomultiplier tubes (R9880U-20, R14755U-100 and R7600U-00-M4), considered as potential candidates for the upgrade. Tests up to 300 kGy and an integrated charge of about 1000 C were achieved, matching the expected operating conditions for LHCb Run 4 and Run 5.
Delenne, J., Auffray, E., Barnyakov, M., Bellavista, A., Boayrintsev, A., Carbone, A., et al. (2026). Photodetector and scintillators development for the LHCb ECAL upgrade. JOURNAL OF INSTRUMENTATION, 21(4), C04083-C04083 [10.1088/1748-0221/21/04/C04083].
Photodetector and scintillators development for the LHCb ECAL upgrade
Bellavista A.;Carbone A.;Ferrari F.;Manuzzi D.;Perazzini S.;Salomoni M.;Vagnoni V.;Zenesini F.;
2026
Abstract
The LHCb electromagnetic calorimeter (ECAL) needs to be upgraded for Run 4 and 5, which will take place during the High-Luminosity phase of the Large Hadron Collider. The inner regions will be equipped with Spaghetti calorimeter (SpaCal) modules, using organic scintillating fibres in regions exposed to radiation doses of up to 200 kGy. A study has been carried out on plastic scintillators, focusing on green (3-hydroxyflavone (3HF)) and blue emitting plastic scintillators produced by ISMA in Kharkiv, Ukraine. Characterization of light yield, scintillation kinetics, and dedicated irradiation campaign have been performed, highlighting 3HF-based scintillators as promising candidates. In parallel, irradiation and ageing campaigns were performed on three Hamamatsu metal-channel dynode photomultiplier tubes (R9880U-20, R14755U-100 and R7600U-00-M4), considered as potential candidates for the upgrade. Tests up to 300 kGy and an integrated charge of about 1000 C were achieved, matching the expected operating conditions for LHCb Run 4 and Run 5.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
