Mechanics, readout and cooling systems of the Mu3e experiment

Aeschbacher, Frank Meier; Deflorin, Marin; Noehte, L.

doi:10.22323/1.373.0041

Cited by 5 publications

(8 citation statements)

References 6 publications

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“…The chips are glued onto the HDIs. The electrical connections between the HDI and the chip are made using single point tape automated bonding (spTAB) [12] and [13,Sec. 3].…”

Section: Vertex Detector Description and Test Setupsmentioning

confidence: 99%

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Theodor¹,

Aeschbacher²,

Deflorin³

et al. 2023

Preprint

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We report the successful operation of a functional pixel detector with gaseous helium cooling. Using an accurate mock-up beforehand, the cooling was validated. We use a miniature turbo compressor to propel the helium at 2 g/s under ambient pressure conditions with gas temperatures above 0 °C. Our earlier results based on computational fluid dynamics simulations and a much simpler mock-up are confirmed. With this, we paved the path to cool pixel detectors in experimental particle physics at heat densities up to 400 mW/cm 2 using helium. This enables cooling of detectors with very low mass requirements, minimising the effects of multiple Coulomb scattering effectively. The concept presented here is not limited to pixel detector applications and can be used to cool any surface with comparable heat-densities, only limited by shaping the helium gas flow.

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“…The chips are glued onto the HDIs. The electrical connections between the HDI and the chip are made using single point tape automated bonding (spTAB) [12] and [13,Sec. 3].…”

Section: Vertex Detector Description and Test Setupsmentioning

confidence: 99%

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Theodor¹,

Aeschbacher²,

Deflorin³

et al. 2023

Preprint

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“…The pixel sensors generate about 250 mW/cm 2 of heat. To remove this heat whilst keeping the material budget of the tracker sufficiently low, a gaseous He cooling system [10] is deployed providing well controlled He flows at atmospheric pressure between and outside the pixel layers.…”

Section: The Mu3e Detectormentioning

confidence: 99%

The Mu3e experiment

Waûters

2021

SciPost Phys. Proc.

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The experiment aims for a single event sensitivity of 2\cdot 10^{-15}2⋅10−15 on the charged lepton flavour violating \mu^+\rightarrow e^+ e^+ e^-μ+→e+e+e− decay. The experimental apparatus, a light-weight tracker based on custom High-Voltage Monolithic Active Pixel Sensors placed in a 1 T magnetic field is currently under construction at the Paul Scherrer Institute, where it will fully use the intense 10^88\mu^+μ+/s beam available. A final sensitivity of 1 \cdot 10^{-16}1⋅10−16 is envisioned for a phase II experiment, driving the development of a new high-intensity continuous muon source which will deliver >10^99\mu^+μ+/s to the experiment.

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“…In the past, the general concept of detector construction and cooling was proven [9]. It was studied with a thermo-mechanical mock-up using aluminized polyimide tapes equipped with steel plates.…”

Section: Thermal-mechanical Mock-upmentioning

confidence: 99%

The Mu3e experiment: Toward the construction of an HV-MAPS vertex detector

Rudzki,

Augustin,

Deflorin

et al. 2021

Preprint

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The Mu3e experiment searches for the lepton flavor violating decay µ + → e + e + e − with an ultimate aimed sensitivity of 1 event in 10 16 decays. This goal can only be achieved by reducing the material budget per tracking layer to X/X 0 ≈ 0.1 %. High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) which are thinned to 50 µm serve as sensors. Gaseous helium is chosen as coolant.Results of recent studies related to the sensor prototypes, the helium cooling, and module prototyping are presented. The recent chip submission MuPix10 has proven its functionality regarding efficiency and time resolution. The helium cooling system for the inner tracker could be verified using a full-scale prototype. A complete prototype equipped with MuPix10 chips will be tested inside the Mu3e magnet in summer 2021.

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Mechanics, readout and cooling systems of the Mu3e experiment

Cited by 5 publications

References 6 publications

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

The Mu3e experiment

The Mu3e experiment: Toward the construction of an HV-MAPS vertex detector

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