The Mu3e collaboration grieves for Kirk Arndt.
We lost a very good friend and wonderful colleague.
Search for the lepton-flavour violating decay
$\mu^+ \to e^+ e^+ e^-$
The Mu3e experiment is a new search for the lepton-flavour violating decay of a positive muon into two positrons and one electron.
Ulrich Hartenstein succsfully defends his Ph.D. thesis on track-based alignment of the Mu3e detector
Ulrich Hartenstein developed algorithms for aligning the Mu3e detector using reconstructed particle tracks. Today he successfully defended his thesis at the university of Mainz. The thesis is available here.
Meeting on Mu3e detector construction in Wengen
We spent four days in Wengen, Switzerland going over the details of the Mu3e detector and discussing the procedures for producing and integrating the sub-detectors. Safety, powering, cooling, electronics and readout were also among the topics. Some photos in the Picture gallery.
Lennart Huth successfully defends his thesis on the MuPix telescope and pixel sensor characterization.
Lennart Huth has developed the MuPix beam telescope and used it in a long series of test beams to characterize MuPix sensors. He has successfully defended his thesis at Heidelberg university. The thesis is available here.
Sebastian Dittmeier successfully defends his thesis on the Mu3e data acquisition system.
Sebastian Dittmeier has developed many important parts of the Mu3e data acquisition system, which has allowed him to perform the first successful vertical slice test of the readout system. He has now successfully defended his thesis, which also involves a study of wireless readout systems at 60 GHz, at Heidelberg university. The thesis is available here.
Collaboration meeting in Liverpool.
The Mu3e collaboration met for three days at the University of Liverpool to discuss integration and assembly of the experiment and recent progress for all subdetectors.
Simon Corrodi successfully defends his thesis on the Mu3e fibre detector.
Simon Corrodi has made important contributions to all aspects of fibre detector development, ranging from simulation and reconstruction via fibre characterization and mechanical integration to data acquisition and electronics. He has now successfully defended his thesis at ETH Zürich. The thesis is available here.
Huangshan Chen successfully defends his thesis on the development of the MuTRiG ASIC for the Mu3e timing detecors.
Huangshan Chen was instrumental in the development of the MuTRiG ASIC, which performs the time-to-digital conversion for the Mu3e fibre and tile timing detectors. He has now successfully defended his thesis at Heidelberg University. The thesis is available here.
Ann-Kathrin Perrevoort successfully defends her PhD thesis on the sensitivity of the Mu3e experiment for new physics and pixel frontend firmware.
Ann-Kathrin Perrevoort studied the sensitivity of the Mu3e experiment for the main search channel using an effective field theory approach and also simulated the performance for searches for two-body decays of the muon and electron-positron resonances. In addition she contributed a core piece of the pixel front-end firmware, namely the real-time time sorting of hits. The thesis is available here.
Zachary Hodge successfully defends his PhD thesis on the Mu3e beam line design and monitoring.
Zachary Hodge made extensive simulations for the Mu3e muon beam line at PSI, including some upgrade of the muon target E at PSI, which is supposed to improve the muon beam rate significantly. He co-developed a monitoring scheme using a scintillating target and a CCD camera for beam characterization and monitoring. The thesis is available here.
Meeting on Mu3e detector integration in Wengen
We spent four days in Wengen, Switzerland going over the details of the Mu3e detector integration and discussing the procedures for producing the sub-detectors. Safety, powering, cooling, electronics and readout were also among the topics.
Review of Mu3e at PSI
Mu3e has passed a detailed review at the PSI proton accelerator users meeting. Beam time in 2018 was granted for tests of the timing and pixel detectors as well as for further development of the compact muon beam line (CMBL).
Dorothea vom Bruch successfully defends her Ph.D. thesis on the Mu3e filter farm and MuPix timing behaviour
Dorothea vom Bruch developed and implemented the algorithms for the Mu3e filter farm, showing that just 12 PCs with powerful GPUs are sufficient to reduce over 10 Gbyte/s of data to manageable levels. She also performed detailed studies of the position dependent timing behaviour of the MuPix7 HV-MAPS prototype. She has now successfully defended her thesis in Heidelberg. The thesis is available here.
First MuPix8 beam test at DESY
We are testing our new large sensor chip, the MuPix8, in the electron beam at DESY, Hamburg. One of the high resolution EUDET telescopes serves as a reference for efficiency and resolution measurements.
Collaboration meeting in Mainz and new collaborators
In a two day meeting in Mainz we had the pleasure of welcoming four new institutes, namely the universities of Liverpool, Oxford and Bristol as well as University College London to the collaboration. We also discussed progress on all subdetectors and a variety of integration issues.
MuPix8, our first large sensor, has arrived
We have just received first samples of the MuPix8 chip from the foundry. This is our first large (20mm x 10mm) pixel sensor prototype and a big step on the way to building the Mu3e tracking detector. The prototype will now be thoroughly tested in the labs in Karlsruhe and Heidelberg and will also soon see first beam at DESY in Hamburg, PSI and MAMI in Mainz.
Felix Berg successfully defends his Ph.D. thesis on the Compact Muon Beam Line (CMBL) for Mu3e
Felix Berg has developed a full simulation of the high intensity, compact muon beam line for Mu3e. Beam tests he performed in the piE5 area have validated his simulations and established the beam setup for phase I of Mu3e. He has successfully defended his thesis at ETH Zürich. The thesis is available here.
Meeting on future directions with Mu3e in Wengen
We spent four days in Wengen, Switzerland, discussing ideas for physics with the Mu3e apparatus beyond the search for the lepton-flavour violating decay of the muon to three electrons. Collaboration members and theorists presented new ideas for future measurements with the high acceptance, high resolution Mu3e spectrometer using high intensity muon and pion beams at PSI. Technical challenges and promising R&D directions related to high-intensity data taking were also discussed in detail.