No abstract available

[en] In this article the authors review the present status of their knowledge on the hadroproduction characteristics of charm and beauty. During a brief description of the properties of all charm and beauty particles reportedly observed in hadron-hadron experiments they discuss the strengths and weaknesses of the various experimental techniques. In particular they emphasise the quantitative problems associated with nuclear target experiments and show the progress that is being made in understanding the A-dependence problem. Focussing on charm cross sections the authors see that the data are becoming sufficiently good to give us a reliable and coherent picture which provides a serious test of the QCD fusion model. This same fusion model is then used with existing beauty cross section determinations to make some extrapolations. Finally, a few remaining puzzles and curiosities are underlined

[en] A brief review of charm hadroproduction results is presented. In order to avoid the confusion that has long irked this subject the discussion is devoted solely to single proton target data. 19 refs

[en] A simple model of reverse reach-through APDs is described. APD parameters including the dependence of the electric field and gain on the bias voltage, dependence of gain on wavelength are calculated using the McIntyre approach and an assumed doping profile of the APD

[en] In this paper tracking is explained and a couple of historical examples are given and some relevant characteristics of the Superconducting Super Collider environment presented. The need for compromise in the absence of adequate funding, the importance of detector simulation and focus on the need for high uniform tracker efficiency are discussed. Finally the connection between radiation damage and efficiency is emphasised. (author)

No abstract available

[en] A review is given of the existing charm programme at the SPS and some future options are discussed. The SPS programme is put into the context of the existing knowledge on charm properties and the associated mysteries. (orig.)

[en] The authors present a review about the development of bubble chambers with special regards to the LEBC of CERN. The direct observation of charm particles with this bubble chamber is described. Furthermore the application of holography to bubble chambers is discussed. (HSI)

[en] Results on the radiation hardness of photodiodes to fast neutrons are presented. Four photodiodes (three avalanche photodiodes from two manufacturers, and one PIN photodiode) were exposed to neutrons from a ²⁵²Cf source at Oak Ridge National Laboratory. The effects of this radiation on many parameters such as gain, intrinsic dark current, quantum efficiency, noise, capacitance, and voltage and temperature coefficients of the gain for these devices for fluences up to ∼2x10¹³ neutrons/cm² are shown and discussed. While degradation of APDs occurred during neutron irradiation, they remained photosensitive devices with gain

[en] The basic characteristics of the SPS H2 beam serving the European Hybrid Spectrometer (EHS) are presented, including brief descriptions of the target station capabilities, the various optical modes and instrumentation of the beam as well as the particle fluxes available, as measured in experiment NA20. Special facilities which have been introduced or are planned for EHS are: time-modulation, enriched (K⁺), and tertiary (anti p, e) beams, including a proposed γ-tagging system. Finally some remarks on possible future developments (e.g. extracted anti p and neutral beams) are made with a view to widening the discussion. (orig.)