No abstract available

No abstract available

[en] A transition radiation detector (TRD) for the identification of prompt electrons in one of the proposed LEP detectors is planned. Tests to be described in the paper show that rather little space is required for such a TRD to achieve a π/e rejection of at least 20:1 at 95% acceptance for electrons with momenta in excess of approx. 2 GeV/c. Combining the TRD with an additional electromagnetic shower calorimeter in the LEP detector, a total hadron rejection of the order of 10³:1 or better can be obtained

[en] Transition radiation of electrons with Lorentz factors γ=E/mc² ranging from 200 to 2000 has been measured. Special care was taken to optimize stacks (mylar) and proportional counters (Xe-He mixtures) in order to detect transition radiation at the lowest possible γ values in the presence of the ionizing particle. It is found that transition radiation can provide discrimination, e.g. pions against kaons, at momenta well below 100 GeV/c, i.e. it becomes effective where the relativistic rise of the ionization is levelling off. (Auth.)

[en] Published in summary form only

[en] The performance of a readout system for the Synchrotron Radiation Detector (SRD) is studied. The detector is proposed as part of the Alpha Magnetic Spectrometer experiment, an experiment to fly on the International Space Station (ISS) beginning of 2005. The SRD is designed to detect the synchrotron radiation from electrons and positrons (TeV energy range) produced in the earth's magnetic field. For the planned array of scintillators and photomultipliers a readout system is chosen, which is compact, space qualified and has a low-power consumption. The low-power chip APV, originally designed for the CMS experiment at LHC (CERN), is foreseen for the readout. To overcome the diffuse background from photons and charged particles the SRD readout must have a time resolution better than 10 ns. The intrinsic time resolution (sigma from Gauss fit) of the APV25-S0 was found to be 0.46±0.01 and 0.68±0.02 ns for the APVM, whereas the time resolution of the photomultiplier-APV readout system was measured to be 2.73±0.10 ns for the APV25-S0 and 2.90±0.21 ns for the APVM. The investigated timing capabilities of the photomultiplier-APV readout system show that the APV chip is suitable for the SRD readout

[en] A large area transition radiation detector has been proposed for the European Hybrid Spectrometer at CERN. Its construction is based on experience with a smaller size model detector which has been tested in hadron beams between 40 and 140 GeV/c momentum. The detector allows identification of pions versus kaons and protons at momenta beyond approx. 90 GeV/c. (orig.)

No abstract available

[en] The innermost region of the CMS detector will consist of silicon pixel and silicon microstrip detectors. One microstrip detector module is essentially composed of three elements: a set of silicon sensors, a mechanical support structure and the Front End Electronics (FE hybrid). During the production phase of the CMS tracking device, various quality and functionality tests of each detector component have to be performed to assure a stable tracker performance for a time scale of about 10 years of LHC running. This demands a chain of testing procedures beginning at the Hybrid component level and ending at the assembled module level. Each production and assembly step needs a specific testing environment and procedure (e.g. long- or short-term tests and temperature cyclings). A compact, cost efficient test and diagnostic tool which is suited for the operation and characterization of hybrids and silicon detector modules will be presented. The test setup is mainly composed of two printed circuit boards, one interface to the PC and the graphical user interface

[en] Published in summary form only