Mu3e Integration Run 2021

Köppel, Marius

doi:10.22323/1.402.0233

Cited by 3 publications

(3 citation statements)

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“…This is a fully working prototype using MuPix10 MAPS chips [16]. The detector was successfully operated to observe cosmic ray muons [17] as well as with muons from the Paul Scherrer Institut (PSI) secondary beamline πE5 [18]. The campaigns focused on the demonstration of the full operation of the vertex detector, thermal studies were of lower priority.…”

Section: Mupix10 Vertex Detector Prototypementioning

confidence: 99%

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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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Section: Mupix10 Vertex Detector Prototypementioning

confidence: 99%

“…In the DAQ integration run 2021 [19,18], correlation data between the two tracking layers was used to verify that the pixel chips and their DAQ are working. In the cosmic run 2022 [17], correlations between the pixel detector and the Mu3e scintillating fibre detector could be measured.…”

Section: Mupix10 Vertex Detector Prototypementioning

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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“…Once alignment is completed, the experiment's resolution is primarily limited by multiple Coulomb scattering effects. Lastly, a detector prototype with PCBbased support, instead of the aluminium-polyimide laminates, equipped with MuPix10 chips was successfully operated as the first active pixel detector with gaseous helium cooling as reported in [6].…”

Section: Gaseous Helium Coolingmentioning

confidence: 99%

An ultra-light helium cooled pixel detector for the Mu3e experiment

Rudzki,

Augustin,

Immig

et al. 2023

J. Inst.

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The Mu3e experiment searches for the lepton flavour violating decay μ + → e + e - e + with a target sensitivity of 1 event in 1016 decays. To achieve this goal, the experiment must minimize the material budget. The pixel detector uses High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) which are thinned down to 50 μm. Combined with gaseous helium as low density coolant, this results in only X/X 0 ≈ 0.1% per tracking layer. Both helium cooling and HV-MAPS are a novelty for particle physics experiments. Here, the work on successfully cooling a pixel tracker using gaseous helium, and performance data of the final HV-MAPS used by Mu3e, the MuPix11, is presented. The thermal studies focus on the two inner tracking layers, the Mu3e vertex detector, and the first operation of a functional thin pixel detector cooled with gaseous helium. Miniature turbo compressors are found to be sufficient to cool thin silicon pixel detectors at heat densities of up to 350 mW/cm2. The presented results demonstrate the feasibility of using HV-MAPS combined with gaseous helium as a coolant for an ultra-thin pixel detector exploring new frontiers in lepton flavor.

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Data Flow in the Mu3e DAQ

Köppel

2023

IEEE Trans. Nucl. Sci.

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Mu3e Integration Run 2021

Cited by 3 publications

References 0 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

An ultra-light helium cooled pixel detector for the Mu3e experiment

Data Flow in the Mu3e DAQ

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