Lectures

Many of our staff members do give lectures at various universities. Below please find a summary of those:
Name Title of the lecture University
Prof. Dr. K. Kirch Nuclear and Particle Physics with Applications ETH Zurich
  Physik II ETH Zurich
Prof.Dr. R. Horisberger Elektronik für Physiker ETH Zurich
Dr. M. Spira Colloquia in Elementary Particle Physics PSI
  The Standard Model of Strong and Electroweak Interactions ETH Zurich
  Phänomenologie der Physik jenseits des Standardmodells ETH Zurich


Opportunities for Students

The Laboratory of Particle Physics offers various opportunities to students for practical training, semester projects and postgraduate theses. This page is constantly updated and gives an overview of these possibilities.

Practical Training

- nothing available at the moment -

Semester Projects

Thermometrie des klimatisierten nEDM Experiments

  • Kalibration von Thermometern mittels existierenden Versuchsaufbau
  • Anbringen des kalibrierten Thermometer am und um das Experiment
  • Messungen von Temperaturgradienten -> erstellen einer 3D Temperaturkarte
Contact: Schmidt-Wellenburg Philipp

Messung der Strahlungsfestigkeit von CFK

Kupferbeschichtetes Kohlefaserplastik ist ein innovatives Material um leichte, nicht magnetische Vakuumkammern zu bauen. Häufig werden Vakuumkammern in einem Strahlenbelasteten Umfeld eingesetzt.
  • Bestrahlung von CFK-Proben (Neutronen, Protonen)
  • Messung Durchstossfestigkeit in Abhängigkeit der Bestrahlungsdauer
  • Analyse der Daten (Matlab / Origin)
Contact: Schmidt-Wellenburg Philipp

Proton Beam Uniformity Measurement with the PROPIX Ionization Chamber

The PROPIX Ionization Chamber consists of 400 pixels covering area typical for beam size dimensions of the PSI Proton Irradiation Facility PIF. It was constructed with the in house developed GOTTHARD readout chip also used at SLS and XFEL. The instrument with its very high sensitivity and positional accuracy enables for fast measurements of the beam profiles at the target location. Several tests for different beam setups will be performed and data will be analyzed for future PIF experiments carried out by the users from CERN and ESA.

Contact: Wojtek Hajdas

Response of the Low Energy Electron Detector LEED to background of the high energy protons

The Low Energy Electron Detector is a small instrument to be installed on the satellites for studies of the radiation belts and hot plasma clouds in the Earth magnetosphere. The LEED prototype has been already tested using electrons and X-rays in its nominal energy range. In the next step the measurements with the high energy protons will be performed. They will determine the instrument response to the possible proton background i.e. in the radiation belts or from the solar energetic particle events. The tests will be performed in the Proton Irradiation Facility using energies typical for the proton environment in space.

Contact: Wojtek Hajdas

Postgraduate Theses (Master's)

Charakterisierung von Bornitrit Keramik als Isolatorring des nEDM Experiments

  • Testversuche bzgl. elektrischer und Vakuum relevanter Charakteristika
  • Tests zur Kompatibilität mit Hg-Magnetometer
  • Neutronreflektometriemessung zur Bestimmung des optischen Potentials
Anforderungen:
  • Freude am Experimentieren
  • Motivation kleine Steuerungs- und Analyseprogramme zu programmieren (Kenntnisse in Labview u. Matlab /Origin)
  • Selbständiges Arbeiten
Contact: Schmidt-Wellenburg Philipp

Verbesserung der Detektion-Effizienz durch Verkleinerung der Entleerungszeit der UCN aus der nEDM Kammer durch Optimierung der Flächenstruktur des Isolatorrings

  • Monte Carlo Optimierung der Entleerungszeit mit komplexeren Flächenstrukturen
  • Untersuchung des Einflusses einer komplexeren Flächenstruktur auf Hochspannungseigenschaften und Leckströme
  • Testversuche bzgl. Hochspannungseigenschaften und Leckströme mit Prototypen, projektbedingt auch mit neuem Isolatorring
Anforderungen:
  • Grundlagenwissen über Experimentieren (zB. Elektronik)
  • Numerische C/C++ Programmierung
Contact: Zsigmond Geza

Semester or Master projects

Development of detectors with fibers coupled with SiPM

The silicon photomultiplier (SiPM) is a recent and established evolution of the avalanche photodiode (APD). This device is particularly appropriate for the use in scintillation light because of its high sensitivity, high quantum efficiency, and insensitivity to magnetic field (up to 4 T). Excellent time and energy resolution in addition to small size are crucial for applications at high rate and single photon production.

Applications of fibers coupled with SiPM as stand-alone beam monitoring or vertex detector and timing detector coupled to tracker detector are envisaged.

An active target for the MEG experiment based on very thin scintillating fibres readout by SiPM is considered. The tool should provide a continuous muon beam monitoring, at the highest DC intensity on the world. An absolute normalization of the collected data sample can be extracted. The detector can be used to provide also a very precise measurement of the muon decay vertex, looking at the emerging positron from the muon decay, with an improvement on the positron momentum and angular variable resolutions. A particle identification between positrons and muons can be performed using the different energy deposit of the particles into the detector. For more information about the MEG experiment and its upgrade please refer to the link: http://meg.web.psi.ch.

A cylindrical time of flight detector (ToF) for the Mu3e experiment to complement the central silicon tracking system is proposed. The main purpose of the ToF system is to measure very precisely the arrival time of particles in order to allow for the matching with hits detected in the silicon detectors. This will help to reject pile-up events (accidental backgrounds) and allow for a charge (direction of propagation) measurement for recurling tracks. A detailed R&D program is ongoing to prove the feasibility of the ToF detector and to help optimizing its design. For more information about the Mu3e experiment please refer to the link: http://www.psi.ch/mu3e.

The main challenges of the proposed projects can be identified into (i) the stringent request in terms of material thicknesses, that should be kept as low as possible, to reduce the multiple scattering to a minimum compatible with the required performance (i.e. detection efficiency and time resolution) and (ii) the high rate environment. Activities on the construction of prototypes, test beam, data analysis and Monte Carlo simulation are expected to be covered.

Contact: Angela Papa

Feasibility study of a high-performance LaBr3(Ce) calorimeter

Charged Lepton Flavor Violation (cLFV) can reveal the structure of new physics up to the energy scale of 103 TeV, i.e. well outside the LHC searches reach. The observation of cLFV phenomena such as μ → eγ, μ → eee, μ → e conversion relies on development of detector performance in terms of energy, time and position resolution for gamma rays and positrons or electrons in the energy range 10 ÷ 100 MeV (see for instance the MEG experiment or the Mu3e experiment).

LaBr3(Ce) is a very attractive candidate as a detector medium for the energy range of interest in cLFV searches, thanks to its ultra high light yield (LY) (1.65 times more than the NaI(Tl)), fast emission, possibility of internal energy scale monitoring by means of intrinsic La radioactivity. These properties together with its high density, result in a good candidate as a crystal for a compact calorimeter able to provide simultaneously very high energy and timing performances.

A cylindrical of 3” ×3” crystal was used to study the energy and timing performances of such as detector at relative high energy using nuclear reactions from a Cockcroft-Walton accelerator and a neutron generator. This project includes the measurements with the present detector and Monte Carlo simulation for a prototype of calorimeter consisting of a 4 × 4 (6 × 6) array made with smaller crystals 1.5 × 1.5 × 8 inch coupled to SiPM.

The LaBr3(Ce) is a relative recent scintillator which offers the highest light output together with a very fast time response leading to a strong candidate for future cLFV search. The small crystal size is a present limit on the investigation of the full characteristics of this kind of medium in the field of the high energy physics. The large interest of the scientific community is stimulating the production towards bigger crystal confirming that higher detector performances go in parallel with novel technologies.

Contact: Angela Papa


General E-mail contact: Klaus Kirch