Cover Image

The ultra-lightweight support structure and gaseous helium cooling for the Mu3e silicon pixel tracker

The Mu3e experiment searches for charged lepton flavor violation in the rare decay μ→eee. In order to reach a sensitivity of better than 10−16, more than 109 muon decays per second have to be observed over a running time of one year. Precise determination of particle momentum, vertex position and ti...

Full description

Saved in:
Bibliographic Details
Main Authors: Berger, Niklaus (Author) , Herkert, Adrian (Author) , Huxold, Lukas (Author) , Schöning, André (Author) , Wiedner, Dirk (Author) , Windelband, Bernd (Author)
Format: Article (Journal)
Language:English
Published: August 26, 2014
In: Journal of Instrumentation
Year: 2014, Volume: 9, Issue: 08
ISSN:1748-0221
DOI:10.1088/1748-0221/9/08/C08023
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1748-0221/9/08/C08023
Verlag, lizenzpflichtig, Volltext: https://iopscience.iop.org/article/10.1088/1748-0221/9/08/C08023
Get full text
Author Notes:N. Berger, A. Herkert, L. Huxold, A. Schöning, D. Wiedner and B. Windelband
Description
Summary:The Mu3e experiment searches for charged lepton flavor violation in the rare decay μ→eee. In order to reach a sensitivity of better than 10−16, more than 109 muon decays per second have to be observed over a running time of one year. Precise determination of particle momentum, vertex position and time are necessary for background suppression. These requirements can be met by combining an ultra-lightweight tracker based on High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) with a timing system which consists of a scintillating fiber detector and a tile hodoscope. As the momentum of particles from muon decay at rest is below 53 MeV/c, the silicon pixel tracker resolution is dominated by multiple Coulomb scattering. This leads to extreme requirements for the material budget of the tracking detector of below 0.1% of a radiation length per layer. Even though the target power consumption of the HV-MAPS detector is as low as 150 mW/cm2, the detector cooling must be very efficient and at the same time avoid adding material inside the active tracking volume.
Item Description:Gesehen am 28.08.2020
Physical Description:Online Resource
ISSN:1748-0221
DOI:10.1088/1748-0221/9/08/C08023

Similar Items