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 6×10−14 for the charged Lepton Flavour Violating μ+→\mboxe+γ decay. CDCH is designed to overcome the limitations of the MEG \mboxe+ 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 ≈12000 wires in a stereo configuration for longitudinal hit localization. The total radiation length is 1.5×10−3\mboxX0, thus minimizing the Multiple Coulomb Scattering (MCS) contribution and allowing for a single-hit resolution of 110 μm and a momentum resolution of 130 keV/c. CDCH integration into the MEG II experimental apparatus will start in this year.
@article{arxiv.2005.02241,
title = {The new drift chamber of the MEG II experiment},
author = {M. Chiappini and A. M. Baldini and G. Cavoto and F. Cei and G. Chiarello and M. Francesconi and L. Galli and F. Grancagnolo and M. Grassi and M. Hildebrandt and D. Nicolò and M. Panareo and A. Papa and F. Raffaelli and F. Renga and G. Signorelli and G. F. Tassielli and C. Voena},
journal= {arXiv preprint arXiv:2005.02241},
year = {2020}
}
Comments
2 pages, 3 figures, proceeding at PisaMeeting2018 conference, published in NIMA