Technical design of the phase I Mu3e experiment

Arndt, K.; Augustin, Heiko; Baesso, P.; Berger, N.; Berg, F.; Betancourt, C.; Bortoletto, D.; Bravar, A.; Briggl, Konrad; Bruch, Dorothea Vom; Buonaura, A.; Cadoux, F.; Barajas, CA Chavez; Chen, H.; Clark, K.; Cooke, P.; Corrodi, S.; Damyanova, A.; Demets, Y.; Dittmeier, Sebastian; Eckert, Patrick; Ehrler, F.; Fahrni, D.; Gagneur, S.; Gerritzen, Lukas; Goldstein, J.; Gottschalk, D.; Grab, C.; Gredig, R.; Groves, AM; Hammerich, Jan Patrick; Hartenstein, U.; Hartmann, U.; Hayward, H. S.; Herkert, A.; Hesketh, G. G.; Hetzel, S.; Hildebrandt, M.; Hodge, Z.; Höfer, A.; Huang, Qinhua; Hughes, S. M.; Huth, Lennart; Immig, D.; Jones, T.J.; Jones, Martin V.; Kästli, H.Chr.; Köppel, M.; Kettle, P.‐R.; Kiehn, M.; Kilani, S.; Klingenmeyer, Hannah; Knecht, A.; Knight, A.; Kotliński, B.; Kozlinskiy, A.; Leys, Richard; Lockwood, G. J.; Loreti, A.; Marra, D. La; Müller, M.; Meier, Beat H.; Aeschbacher, Frank Meier; Meneses, Anelise Ramires; Metodiev, Kaloyan; Mtchedlishvili, A.; Muley, Sachin; Munwes, Y.; Noehte, L.; Owen, P.; Papa, A.; Paraskevas, I.; Perić, I.; Perrevoort, A.; Plackett, R.; Pohl, M.; Ritt, Stefan Andreas; Robmann, P.; Rompotis, N.; Rudzki, T.; Rutar, G.; Schöning, A.; Schimassek, Rudolf; Schultz‐Coulon, H.‐C.; Serra, N.; Shen, Wei; Shipsey, I.; Shrestha, S.; Steinkamp, O.; Stoykov, A.; Straumann, U.; Streuli, S.; Stumpf, Kevin; Tata, N.; Velthuis, J. J.; Vigani, L.; Figueras, E. Vilella; Vossebeld, J. H.; Wallny, R.; Wasili, A.; Waûters, Frederik; Weber, A.; Wiedner, D.; Windelband, B.; Zhong, Tiancheng

doi:10.1016/j.nima.2021.165679

Cited by 68 publications

(74 citation statements)

References 55 publications

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“…This allows to bias the substrate with a high negative voltage and to deplete the zone around the n-well. This technology has been chosen for the Mu3e experiment [23] which has very stringent constraints on the material budget and requires the sensors to be thinned to 50 μm. The 2 × 2 cm 2 large sensors are mounted on a low-mass service flexible printed circuit.…”

Section: Monolithic Cmos Mapsmentioning

confidence: 99%

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Tracking and vertex detectors at FCC-ee

2022

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The combined vertexing and tracking performance of the innermost part of the FCC-ee experiments must deliver outstanding precision for measurement of the track momentum together with an impact parameter resolution exceeding by at least a factor five that typically achieved at LHC experiments. Furthermore, precision measurements require stability and fiducial accuracy at a level which is unprecedented in collider experiments. For the innermost vertex layers these goals translate into a target hit resolution of approximately 3 $$\mu \hbox {m}$$ μ m together with a material budget of around 0.2% of a radiation length per layer. Typically this performance might be provided by silicon-based tracking, together with a careful choice of a low-mass cooling technology, and a stable, low-mass mechanical structure capable of providing measurements with a low enough systematic error to match the tremendous statistics expected, particularly for the run around the Z resonance. At FCC-ee, the magnetic field will be limited to approximately 2 T, in order to contain the vertical emittance at the Z pole, and a tracking volume up to relative large radius is needed. The technological solution could be silicon- or gaseous-based tracking, in both cases with the focus on optimising the material budget, and particle identification capability would be an advantage. Depending on the global design, an additional silicon tracking layer could be added at the outer radius of the tracker to provide a final precise point contributing to the momentum or possibly time-of-flight measurement. Current developments in monolithic and hybrid silicon technology, as well as advanced gaseous tracking developments, provide an encouraging road map towards the FCC-ee detector. The current state of the art and potential extensions will be discussed and a generic call for technology which could have a significant impact on the performance of an FCC-ee tracking and vertexing detector is outlined.

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Section: Monolithic Cmos Mapsmentioning

confidence: 99%

“…The 2 × 2 cm 2 large sensors are mounted on a low-mass service flexible printed circuit. The pixel detector is operated inside a dry helium atmosphere cooled by helium gas flow to further reduce multiple scattering [23].…”

Section: Monolithic Cmos Mapsmentioning

confidence: 99%

Tracking and vertex detectors at FCC-ee

2022

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“…BF < 10 −12 [3]. The Mu3e experiment aims to repeat this search with a sensitivity improved by four orders of magnitude [4], [5]. The experiment will be performed in two phases, where the first phase will use an existing beam-line at PSI providing up to 10 8 muons/s whereas the second phase, aiming for the ultimate sensitivity, requires a new High intensity Muon Beam-line (HiMB) with 10 9 − 10 10 muons per second.…”

Section: Scintillating Bresmentioning

confidence: 99%

The Mu3e Data Acquisition

Augustin,

Berger,

Bravar

et al. 2020

Preprint

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The Mu3e experiment aims to find or exclude the lepton flavour violating decay µ + → e + e − e + with a sensitivity of one in 10 16 muon decays. The first phase of the experiment is currently under construction at the Paul Scherrer Institute (PSI, Switzerland), where beams with up to 10 8 muons per second are available. The detector will consist of an ultrathin pixel tracker made from High-Voltage Monolithic Active Pixel Sensors (HV-MAPS), complemented by scintillating tiles and fibres for precise timing measurements. The experiment produces about 100 GBit/s of zero-suppressed data which are transported to a filter farm using a network of FPGAs and fast optical links. On the filter farm, tracks and three-particle vertices are reconstructed using highly parallel algorithms running on graphics processing units, leading to a reduction of the data to 100 MByte/s for mass storage and offline analysis. The paper introduces the system design and hardware implementation of the Mu3e data acquisition and filter farm. I. INTRODUCTIONT HE Mu3e experiment is designed to search for the lepton flavour violating decay µ + → e + e − e + ; in the Standard Model of elementary particle physics, this process is very highly suppressed [1], [2] -an observation would be a clear sign of new physics beyond the Standard Model. The SINDRUM experiment at PSI performed a search for this decay in the 1980s and set a limit for the branching fraction

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“…It is also considered highly complementary to other muon CLFV processes, in particular the µ → 3e and µ − → e − conversion in atomic nuclei [9]. In particular, the µ + → e + γ search with the MEG experiment upgrade, MEG II, in terms of new physics reach, is competitive with the new generation of CLFV experiments such as Mu3e [10], Mu2e [11], COMET [12] and DeeMe [13].…”

Section: Introductionmentioning

confidence: 99%

Towards a New μ→eγ Search with the MEG II Experiment: From Design to Commissioning

et al. 2021

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The MEG experiment represents the state of the art in the search for the Charged Lepton Flavour Violating μ+→e+γ decay. With its first phase of operations at the Paul Scherrer Institut (PSI), MEG set the most stringent upper limit on the BR (μ+→e+γ)≤4.2×10−13 at 90% confidence level, imposing one of the tightest constraints on models predicting LFV-enhancements through new physics beyond the Standard Model. An upgrade of the MEG experiment, MEG II, was designed and it is presently in the commissioning phase, aiming at a sensitivity level of 6×10−14. The MEG II experiment relies on a series of upgrades, which include an improvement of the photon detector resolutions, brand new detectors on the positron side with better acceptance, efficiency and performances and new and optimized trigger and DAQ electronics to exploit a muon beam intensity twice as high as that of MEG (7×107 μ+/s). This paper presents a complete overview of the MEG II experimental apparatus and the current status of the detector commissioning in view of the physics data taking in the upcoming three years.

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Technical design of the phase I Mu3e experiment

Cited by 68 publications

References 55 publications

Tracking and vertex detectors at FCC-ee

Tracking and vertex detectors at FCC-ee

The Mu3e Data Acquisition

Towards a New μ→eγ Search with the MEG II Experiment: From Design to Commissioning

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