The Cylindrical Drift Chamber of the MEG II experiment

Chiappini, M.; Baldini, A.; Benmansour, H.; Cavoto, G.; Cei, F.; Chiarello, G.; Corvaglia, A.; Cuna, F.; Maso, G. Dal; Francesconi, M.; Galli, L.; Grancagnolo, F.; Grassi, M.; Hildebrandt, M.; Ignatov, F.V.; Meucci, M.; Miccoli, A.; Molzon, W.; Nicoló, D.; Oya, Atsushi; Palo, D.; Panareo, M.; Papa, A.; Raffaelli, F.; Renga, F.; Schwendimann, P.; Signorelli, G.; Tassielli, G.; Uchiyama, Y.; Venturini, A.; Vitali, B.; Voena, C.

doi:10.1016/j.nima.2022.167740

Cited by 4 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A low-mass (1.6 × 10 −3 X 0 ), single volume (length and diameter of 2 m and 60 cm respectively) Cylindrical Drift CHamber (CDCH) [6] with high granularity (9 layers of 192 drift cells, few mm wide, defined by 11904 wires) measures the positron momentum vector, with position, angular and momentum resolutions at 1 mm, 6.5 mrad and 100 keV/c level respectively. The CDCH ensures the full azimuthal coverage around the target with an active region which starts and extends radially at 𝑅 ∼ 20 cm and for Δ𝑅 ∼ 8 cm respectively (∼ 14 cm bending radius of signal 𝑒 + ).…”

Section: The Meg II Experimentsmentioning

confidence: 99%

MEG II physics and detector performance

Chiappini

2023

J. Inst.

Self Cite

View full text Add to dashboard Cite

In the panorama of the state-of-the-art searches for extremely rare Charged Lepton Flavor Violating (CLFV) processes, the Mu-E-Gamma (MEG) experiment is definitely a reference point in the intensity frontier of modern physics research, setting the best upper limit on the μ + → e + γ decay. The upgrade of MEG, MEG II, wants to give further impetus to the CLFV searches with muons. MEG II relies on a series of upgrades: on the photon side we point up improvements of the γ detector resolutions and acceptance; on the positron side we rely on completely brand new detectors with better acceptance, efficiency and performances; on the Trigger and Data Acquisition (DAQ) side we are able to exploit a higher muon beam intensity despite the increased number of read out channels thanks to a new and optimized electronics. After three years of commissioning, in 2021 the MEG II experiment finally entered the physics data taking phase. An overview of the MEG II physics and experimental contexts is presented, together with the current detector performances based on data. Thanks to the new experimental apparatus the final sensitivity goal is expected to be one order of magnitude better than the first phase of MEG.

show abstract

Section: The Meg II Experimentsmentioning

confidence: 99%

MEG II physics and detector performance

Chiappini

2023

J. Inst.

Self Cite

View full text Add to dashboard Cite

show abstract

Progress of muonium-to-antimuonium conversion experiment

Zhao,

Tang

2024

Nuclear and Particle Physics Proceedings

View full text Add to dashboard Cite

Operation and performance of the MEG II detector

Afanaciev,

Baldini,

Ban

et al. 2024

Eur. Phys. J. C

View full text Add to dashboard Cite

The MEG II experiment, located at the Paul Scherrer Institut (PSI) in Switzerland, is the successor to the MEG experiment, which completed data taking in 2013. MEG II started fully operational data taking in 2021, with the goal of improving the sensitivity of the $$\upmu ^+ \rightarrow {\textrm{e}}^+ \upgamma $$ μ + → e + γ decay down to $$\sim 6 \times 10^{-14}$$ ∼ 6 × 10 - 14 almost an order of magnitude better than the current limit. In this paper, we describe the operation and performance of the experiment and give a new estimate of its sensitivity versus data acquisition time.

show abstract

The Cylindrical Drift Chamber of the MEG II experiment

Cited by 4 publications

References 9 publications

MEG II physics and detector performance

MEG II physics and detector performance

Progress of muonium-to-antimuonium conversion experiment

Operation and performance of the MEG II detector

Contact Info

Product

Resources

About