https://doi.org/10.1140/epjc/s10052-024-12711-y
Regular Article - Experimental Physics
Performances of a new generation tracking detector: the MEG II cylindrical drift chamber
1
INFN Sezione di Pisa, dell’Università, Largo B. Pontecorvo 3, 56127, Pisa, Italy
2
Dipartimento di Fisica, dell’Università, Largo B. Pontecorvo 3, Pisa, Italy
3
INFN Sezione di Pavia, Via Bassi 6, 27100, Pavia, Italy
4
Dipartimento di Fisica, dell’Università, Via Bassi 6, Pavia, Italy
5
INFN Sezione di Roma, dell’Università “Sapienza”, Piazzale A. Moro, 00185, Rome, Italy
6
Dipartimento di Fisica, dell’Università “Sapienza”, Piazzale A. Moro, Rome, Italy
7
INFN Sezione di Lecce, Via per Arnesano, 73100, Lecce, Italy
8
Dipartimento di Matematica e Fisica, dell’Università del Salento, Lecce, Italy
9
INFN Sezione di Napoli, Via Cintia, 80126, Naples, Italy
10
Paul Scherrer Institut PSI, 5232, Villigen, Switzerland
11
Oliver Lodge Laboratory, University of Liverpool, L69 7ZE, Liverpool, UK
12
University of California, 92697, Irvine, CA, USA
13
ICEPP, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
14
Kobe University, 1-1 Rokkodai-cho, Nada-ku, 657-8501, Kobe, Hyogo, Japan
15
Department of Engineering, University of Palermo, Viale delle Scienze, Building 9, 90128, Palermo, Italy
16
INFN Sezione di Bari, Via Giovanni Amendola, 173, 70126, Bari, Italy
17
Dipartimento di Medicina e Chirurgia, Università LUM “Giuseppe Degennaro”, Casamassima, 70010, Bari, Italy
Received:
21
October
2023
Accepted:
23
March
2024
Published online:
7
May
2024
The cylindrical drift chamber is the most innovative part of the MEG II detector, the upgraded version of the MEG experiment. The MEG II chamber differs from the MEG one because it is a single volume cylindrical structure, instead of a segmented one, chosen to improve its resolutions and efficiency in detecting low energy positrons from muon decays at rest. In this paper, we show the characteristics and performances of this fundamental part of the MEG II apparatus and we discuss the impact of its higher resolution and efficiency on the sensitivity of the MEG II experiment. Because of its innovative structure and high quality resolution and efficiency the MEG II cylindrical drift chamber will be a cornerstone in the development of an ideal tracking detector for future positron-electron collider machines.
© The Author(s) 2024
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Funded by SCOAP3.
