This article presents the MEG II Cylindrical Drift CHamber (CDCH), a key detector for the phase 2 of MEG, which aims at reaching a sensitivity level of the order of 6 x 10(-14) for the charged Lepton Flavour Violating mu(+) -> e(+)gamma decay (Calibbi and Signorelli, 2018; Cei and Nicole, 2014). CDCH is designed to overcome the limitations of the MEG e(+) tracker (Baldini a al., 2013) and guarantee the proper operation at high rates with long-term detector stability. CDCH is a low-mass unique volume detector with high granularity: 9 layers of 192 drift cells, few mm wide, defined by approximate to 12000 wires in a stereo configuration for longitudinal hit localization. The total radiation length is 1.5 x 10(-3) X-0, thus minimizing the Multiple Coulomb Scattering (MCS) contribution and allowing for a single-hit resolution of 110 mu m (Baldini a al., 2016) and a momentum resolution of 130 keV/c. CDCH integration into the MEG II experimental apparatus (Baldini a al., 2018) will start in this year.
The new drift chamber of the MEG II experiment / Chiappini, M.; Baldini, A. M.; Cavoto, G.; Cei, F.; Chiarello, G.; Francesconi, M.; Galli, L.; Grancagnolo, F.; Grassi, M.; Hildebrandt, M.; Nicolo, D.; Panareo, M.; Papa, A.; Raffaelli, F.; Renga, F.; Signorelli, G.; Tassielli, G. F.; Voena, C.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 936:(2019), pp. 501-502. [10.1016/j.nima.2018.10.182]
The new drift chamber of the MEG II experiment
Cavoto, G.;Chiarello, G.;Voena, C.
2019
Abstract
This article presents the MEG II Cylindrical Drift CHamber (CDCH), a key detector for the phase 2 of MEG, which aims at reaching a sensitivity level of the order of 6 x 10(-14) for the charged Lepton Flavour Violating mu(+) -> e(+)gamma decay (Calibbi and Signorelli, 2018; Cei and Nicole, 2014). CDCH is designed to overcome the limitations of the MEG e(+) tracker (Baldini a al., 2013) and guarantee the proper operation at high rates with long-term detector stability. CDCH is a low-mass unique volume detector with high granularity: 9 layers of 192 drift cells, few mm wide, defined by approximate to 12000 wires in a stereo configuration for longitudinal hit localization. The total radiation length is 1.5 x 10(-3) X-0, thus minimizing the Multiple Coulomb Scattering (MCS) contribution and allowing for a single-hit resolution of 110 mu m (Baldini a al., 2016) and a momentum resolution of 130 keV/c. CDCH integration into the MEG II experimental apparatus (Baldini a al., 2018) will start in this year.File | Dimensione | Formato | |
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