Student info and photos:C

People
Work Description

Clarence CHANG
Stanford University

clchang@stanford.edu

I am a graduate student working on CDMS (Cryogenic Dark Matter Search), which is one of a handful of WIMP (Weakly Interacting Massive Particle) direct detection experiments. The discovery of WIMPs would have a substantial impact on both cosmology and particle physics. CDMS utilizes state of the art cryogenic detectors to measure the recoil energy imparted to a crystal due to collisions with external particles. As a graduate student, I have been actively involved in many aspects of CDMS including cryogenic operations and debugging, detector testing and characterization, software development, and data analysis.

Tim CHRISTIANSEN
Ludwig-Maximilians-University Munich

Tim.Christiansen@Physik.Uni-Muenchen.de

After completing my Diploma Thesis at OPAL, CERN, where I was performing a measurement of the mass of the W-Boson in the hadronic decay channel WW->qqqq(g), with focus on the influence of hard gluon radiation, I am currently working for the D-ZERO experiment for my Ph.D. thesis. At D-ZERO, one of the two experiments at the proton-antiproton collider TeVatron at Fermilab near Chicago, I have taken an active role in the L2 trigger system for which I have implemented the tracking algorithms for the forward muon spectrometer. My work on the D-ZERO Level 2 trigger also includes hardware responsibilities and trigger studies. Furthermore, I am working on an analysis for the search for supersymmetric signals in the tri-lepton channel. This channel, in which the leptons are originating from the associated production of lightest Chargino and second-lightest Neutralino, is very promising because of its clear signature (very few SM backgrounds) as well as certain scenarios (regions in the parameter space of SUSY models) for which the expected luminosity of the TeVatron, but certainly of the LHC, would allow a discovery.

Ondrej CHVALA
Institute of Particle and Nuclear Physics, Charles University, Prague

0@amu.cz

For my diploma thesis I was working on NA49, one of the small CERN fixed target experiments at SPS designed to study various types of hadron interactions (pp, pA, AA) at several energies, mostly about 160GeV/A beam momenta. I have measured charged pion spectra by means of specific energy loss from our proton-proton data sample and compared it with MC generators (NEXUS, Fritiof) predictions. For my PhD work I continue on NA49. My contribution consists of developing mechanism of corrections to achieve absolute normalization of the measured cross-sections and applying them to relevant data sets. Now I am working on comparing produced particle spectra from proton-proton and neutron-proton interactions investigating interesting isospin effects.

Christopher COLLINS-TOOTH
Imperial College, London

c.collins-tooth@ic.ac.uk

I have been heavily involved in the upgrade of the Transverse Polarimeter (TPOL), which measures lepton polarisation at HERA. To this end, I have collected and analysed data from the new TPOL at several testbeams (conducted at CERN and DESY). The installation of the upgraded TPOL in the HERA tunnel was successful, and now I intend to use the polarisation data and the ZEUS detector at HERA in my thesis, with the ZEUS detector supplying DIS information.

Patricia Ilie 07/2002