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No abstract available

[en] The present state of the design of the 2.5 GeV electron storage ring for the National Synchrotron Light Source is described. This ring will serve as a dedicated source of synchrotron radiation in the wavelength range 0.1 A to 30 A. While maintaining the basic high brigtness features of the eariler developed lattice structure, recent work resulted in a more economical magnet system, is simplified chromaticity corrections, and improved distribution of the X-ray beam lines. In addition, the adequacy of the dynamic aperture for stable betatron oscillations has been verified for a variety of betatron tunes

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[en] This paper was intended to describe the present times for subatomic physics. The experiments are as difficult as the rewards are great. The important questions raised by the Standard Model remain as the main driving force for experiment for the next decade or two. The super theories and superstrings promise to keep theorists frivolously occupied and to remove them as obstacles to progress for a long time. Subatomic physics remains an experimental science with many possibilities for surprises. One should not take seriously the possibility of a physics desert in the energy regime between the gauge bosons (100 GeV) and the X particle (10¹⁵ GeV). For the immediate future the greatest need for ingenuity lies in a broad front of detector technology. Especially greater attention must be given to coping with the high event rate of the new colliders. For the long-term future - beyond the SSC - the development of new accelerator technologies is essential and the consideration of noncollider alternatives attractive

[en] The technifermions and ordinary-fermion masses, arising in the usual approach from technifermions and extended technigauge boson interactions, are generated by a condensation phenomenon occurring in different steps, induced by a composite structure of the ordinary gauge bosons. The compositeness scale lambda=O(TeV)-usually the extended gauge boson's mass-is related to a breakdown of Weyl invariance. A comparison with the usual interpretation of the technifermion approach suggests a relation for the fine-structure constant α/4π=O(M²/lambda²) with m=O(10² GeV) the weak Fermi mass

[en] The experimental results from high channeling investigations are summarized. For energy loss the strong influence of a density effect and channeling is shown for positive and negative particles with moments of 2-15 GeV/c and the results are compared to theoretical calculations. Up to 250 GeV/c channeling has been shown to influence dramatically nuclear reaction yields and scattering phenomena. The channeling is also shown and compared to calculations. (orig.)

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[en] TORCH is a DIRC-style detector concept designed for high-precision time-of-flight measurements over large areas. It has been proposed for the upgrade of the LHCb experiment to complement the particle identification capabilities of the RICH detectors, covering the momentum region 1.5–10 GeV/c for K–π separation. The current status of the detector design and R and D is presented