The new drift chamber of the MEG II experiment
| Autor: | Chiappini, M., Baldini, A. M., Cavoto, G., Cei, F., Chiarello, G., Francesconi, M., Galli, L., Grancagnolo, F., Grassi, M., Hildebrandt, M., Nicolò, D., Panareo, M., Papa, A., Raffaelli, F., Renga, F., Signorelli, G., Tassielli, G. F., Voena, C. |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Nuclear Inst. and Methods in Physics Research A (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.nima.2018.10.182 |
| Popis: | 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 $6 \times 10^{-14}$ for the charged Lepton Flavour Violating $\mu^+ \rightarrow \mbox{e}^+ \gamma$ decay. CDCH is designed to overcome the limitations of the MEG $\mbox{e}^+$ tracker 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 $\approx 12000$ wires in a stereo configuration for longitudinal hit localization. The total radiation length is $1.5 \times 10^{-3}$ $\mbox{X}_0$, thus minimizing the Multiple Coulomb Scattering (MCS) contribution and allowing for a single-hit resolution of 110 $\mu$m and a momentum resolution of 130 keV/c. CDCH integration into the MEG II experimental apparatus will start in this year. Comment: 2 pages, 3 figures, proceeding at PisaMeeting2018 conference, published in NIMA |
| Databáze: | arXiv |
| Externí odkaz: |
|