[en] Monte Carlo simulations were performed to optimize the layer thickness of a Compton camera which utilizes multiple Compton scatterings. The optimum layer thickness was found to be less than 0.5 mm for 150 keV, 2 mm for 511 keV gamma rays and approximately 5 mm for 1000 keV gamma rays. The efficiencies of two multiple Compton scatter cameras which consist of a 20 layer stack of either 1 mm or 4 mm thick Si strip detectors surrounded by a 2 cm thick CsI(Tl) side counter are presented for 150-1000 keV gamma rays. The expected angular resolution of the proposed design (1 mm thick, 20 layer Si) is presented for different assumed noise levels over the energy range 150-1000 keV. ((orig.))

[en] We describe the design and performance of prototype trigger counters for the SDC muon system. The 1.0x48.7x178.7 cm scintillation counters feature compact light guides, use standard 2 in. phototubes, and provide good photoelectron yields (>25) and time resolution (<1 ns). ((orig.))

[en] A computer simulation has been carried out to investigate the performances of an RPC's carpet (ARGO proposal). The effective area and the angular resolution of the detector for air showers initiated 2.5-10 TeV gamma-rays are studied as a function of the RPC time resolution and of the iron converter thickness. (orig.)

[en] The techniques used in the construction of the double-sided ladders for the L3 Silicon Microvertex Detector (SMD) are presented. The detector consists of two cylindrical layers, each of 12 ladders, with double-sided silicon detectors which provide r-phi and z coordinates measurements. This description includes ladder mechanical design and the assembly. A novel solution to readout the z-coordinates is presented. It optimizes very effectively the removal of heat generated by the readout electronics and minimizes the radiation length in the central region. Some results from the survey of the individual ladders are also discussed. (orig.)

[en] We present results of measurements on single and double Resisitive Plate Chambers (RPC) and their possible use for a muon trigger system in a LHC experiment. We studied the working parameters, the flux capabilities and the time and space resolution. (orig.)

[en] The muon system of the Compact Muon Solenoid (CMS) detector for LHC is described. Main parameters of the magnet, construction and performance of the muon chambers, and basic ideas about triggering are presented. (orig.)

[en] Short communication

[en] The method and apparatus of the present invention relate to cryogenically cooling a thermoluminescent material, exposing it to a low level of radiation (less than about 1 R) while it is at the cooled temperature, warming the thermoluminescent material to ''room temperature'', and counting the photons emitted during heating. Sufficient sensitivity is achieved without exposing the thermoluminescent material to ultraviolet light thereby simplifying the measurements. (author)

[en] The principle of near-infrared emission of CdTe semiconductor materials under γ ray irradiation was presented. The sample characteristic were measured using γ pulses from 'Flash-I' accelerator and useful data were obtained. The experimental results had shown that the CdTe sample made by the authors can be used in high γ dose rate detection

[en] The thermoluminescence efficiency, η, of LiF:Mg,Cu,P (MCP-N detectors, commercially produced at the INP, Krakow, Poland), relative to 662 keV ¹³⁷Cs gamma rays, has been measured for (i) 1250 keV ⁶⁰Co gamma rays, (ii) filtered X ray beams of average energies in the range 15-300 kV_p, (iii) ¹⁴⁷Pm beta electrons, (iv) thermal neutrons and (v) stopping alpha particles of initial energies in the range 0.5-5 MeV. A rapid decrease of TL efficiency with decreasing mean photon energy was observed. The rapid decrease of sensitivity of LiF:Mg,Cu,P with increasing ionisation density is a microdosimetric effect, resulting from the saturation of the TL signal from high energy deposits. An empirical relationship between the mean lineal energy, y_F, and η has been found which can be used to predict the TL efficiency of MCP detectors for photons and electrons. However, TL efficiency η is not a unique function of y_F, so this relationship cannot be used to predict the value of η over the whole range of ionisation densities (LET) of heavy charged particles stopping in the detector. (author)