A5061617767- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Muon and positron interactions and applications
- Medical Imaging Techniques and Applications
- Dark Matter and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Radiation Effects in Electronics
- Neutrino Physics Research
Paul Scherrer Institute
2020-2023
University of Geneva
2021
Heidelberg University
2016-2020
TU Dortmund University
2016
The Mu3e experiment aims to find or exclude the lepton flavour violating decay $\mu \rightarrow eee$ at branching fractions above $10^{-16}$. A first phase of using an existing beamline Paul Scherrer Institute (PSI) is designed reach a single event sensitivity $2\cdot 10^{-15}$. We present overview all aspects technical design and expected performance phase~I detector. high rate up $10^{8}$ muon decays per second low momenta electrons positrons pose unique set challenges, which we tackle...
This letter of intent proposes an experiment to search for electric dipole moment the muon based on frozen-spin technique. We intend exploit high field, $E=1{\rm GV/m}$, experienced in rest frame with a momentum $p=125 {\rm MeV/}c$ when passing through large magnetic field $|\vec{B}|=3{\rm T}$. Current fluxes at $μ$E1 beam line permit improved sensitivity $σ(d_μ)\leq 6\times10^{-23}e{\rm cm}$, about three orders magnitude more than current upper limit $|d_μ|\leq1.8\times10^{-19}e{\rm...
In April 2021, scientists active in muon physics met to discuss and work out the case for new High-Intensity Muon Beams (HIMB) project at PSI that could deliver of order $10^{10}$\,s$^{-1}$ surface muons experiments. Ideas concrete proposals were further substantiated over following months assembled present document. The high intensities will allow completely experiments with considerable discovery potential unique sensitivities. is outstanding extremely rich, ranging from fundamental...
The MuPix7 chip is a monolithic HV-CMOS pixel chip, thinned down to 50 \mu m. It provides continuous self-triggered, non-shuttered readout at rates up 30 Mhits/chip of 3x3 mm^2 active area and size 103x80 m^2. hit efficiency depends on the chosen working point. Settings with power consumption 300 mW/cm^2 allow for >99.5%. A time resolution 14.2 ns (Gaussian sigma) achieved. Latest results from 2016 test beam campaigns are shown.
The upcoming Mu3e experiment will search for the charged lepton flavour violating decay of a muon at rest into three electrons. maximal energy electrons is 53 MeV, hence low material budget key performance requirement tracking detector. In this paper we summarize our approach to meet about 0.1 % radiation length per pixel detector layer. This includes choice thinned active monolithic sensors in HV-CMOS technology, ultra-thin flexible printed circuits, and helium gas cooling.
The Mu3e experiment aims to find or exclude the lepton flavour violating decay $\mu^+\to e^+e^-e^+$ with a sensitivity of one in 10$^{16}$ muon decays. first phase is currently under construction at Paul Scherrer Institute (PSI, Switzerland), where beams up 10$^8$ muons per second are available. detector will consist an ultra-thin pixel tracker made from High-Voltage Monolithic Active Pixel Sensors (HV-MAPS), complemented by scintillating tiles and fibres for precise timing measurements....
High Voltage Monolithic Active Pixel Sensors (HV-MAPS) are based on a commercial CMOS process and collect charge by drift inside reversely biased diode. HV-MAPS represent promising technology for future pixel tracking detectors. Two recent developments presented. The MuPix has continuous readout is being developed the Mu3e experiment whereas ATLASPix LHC applications with triggered readout. Both variants have fully monolithic design including state machines, clock circuitries serial drivers....
Mu3e is an upcoming experiment at Paul Scherrer Institut in the search for strongly suppressed decay of $μ\rightarrow eee$. It will use ultra-lightweight silicon pixel detector using thinned HV-CMOS MAPS chips. Multiple Coulomb scattering further kept under control with high density interconnects made aluminium and operating a helium atmosphere. More than 1 m2 instrumented surface produce about 3.3 kW heat ($\leq$ 250 mW/cm2). Traditional cooling approaches are conflict low-mass...
Mu3e is an upcoming experiment at Paul Scherrer Institut in the search for strongly suppressed decay of $\mu\rightarrow eee$. It will use ultra-lightweight silicon pixel detector using thinned HV-CMOS MAPS chips. Multiple Coulomb scattering further kept under control with high density interconnects made aluminium and operating a helium atmosphere. More than 1 m$^2$ instrumented surface produce about 3.3 kW heat ($\leq$ 250 mW/cm$^2$). Traditional cooling approaches are conflict low-mass...
The Mu3e experiment searches for the lepton flavor violating decay $μ^+~\rightarrow~e^+~e^+~e^-$ with an ultimate aimed sensitivity of 1 event in $10^{16}$ decays. This goal can only be achieved by reducing material budget per tracking layer to $X/X_0 \approx 0.1 \%$. High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) which are thinned $50\ μm$ serve as sensors. Gaseous helium is chosen coolant. Results recent studies related sensor prototypes, cooling, and module prototyping presented....
During 2011 and 2012, pp collision data corresponding to integrated luminosities of 1 fb -1 at a centre-of-mass energy 7 TeV 2 8 have been collected with the LHCb detector.This dataset has allowed measure unprecedented precision observables relating CKM unitary triangles.In these proceedings I describe measurements sensitive γ, least well constrained triangle angle.
The Mu3e experiment at PSI aims to search for the charged lepton flavor violating decay µ + → e -e with a sensitivity branching ratio of 10 -16 .To achieve this, high intensity muon beam rate 8 -10 9 muons per second is stopped on target.The electrons are detected silicon pixel tracking detector using High Voltage Monolithic Active Pixel Sensors (HV-MAPS) and timing detectors consisting scintillating fibres tiles.Instead triggered readout, uses online event filtering.This requires readout...
We report the successful operation of a functional pixel detector with gaseous helium cooling. Using an accurate mock-up beforehand, cooling was validated. use miniature turbo compressor to propel at $2\,g/s$ under ambient pressure conditions gas temperatures above $0^{\circ}C$. Our earlier results based on computational fluid dynamics simulations and much simpler are confirmed. With this, we paved path cool detectors in experimental particle physics heat densities up $400\, mW/cm^2$ using...
Mu3e is an upcoming experiment searching for charged lepton flavour violation in the rare decay μ+->e+e-e+. A silicon pixel tracker based on 50 μm thin High-Voltage Monolithic Active Pixel Sensors a 1T magnetic field will deliver precise vertex and momentum information. The MuPix Sensor combines sensor cells with integrated analogue electronics complete digital readout. For characterization of first large system-on-chip dedicated readout system was developed. chain results from scale MuPix8...