[en] The International Tokamak Reactor (INTOR) is defined and its major objectives in the present phase (Phase Two A, Part III) are described. (author). 6 refs, 1 tab

[en] Natural circulation in the APWR+ reactor steam generator is studied, the results are presented. The process of the flow siphon braking was considered

[en] Procedure for the nondestructive ultrasonic control of joints of copper pipe lines by means of surface horizontal waves is developed. Air line with external diameter of 6 mm, thin walls (∼1 mm) and low distance between pipes was an object of the development. Suggested procedure allows revealing defects in hard to rich joints of air lines without stop of equipment

[en] The evolution of the INTOR Workshop activity from its Zero Phase to the present Phase Two A, Part 2, its administrative structure and the role of the Workshop in worldwide fusion research are summarized in order to provide some orientation to the rest of the INTOR papers in these Proceedings. (author)

No abstract available

[en] Degradation of three types of commercially available perfluoroalkyl polyethers (PFPE)-Demnum S200, Fomblin Z25, and Krytox 16256-by X-ray irradiation was studied by using X-ray photoemission spectroscopy (XPS) and a mass spectrometer under ultra-high-vacuum conditions. The carbons in the polymers were characterized by chemical shifts of Cls binding energies. Gaseous products containing COF2 and low-molecular-weight fluorocarbons were formed. From Fomblin Z25, which has acetal linkages (-OCF2O-), a large quantity of COF2 gas was evolved. Liquid products became tacky after a long irradiation time, and some did not dissolve in Freon. High-pressure liquid chromatography (HPLC) showed that molecular weight distribution became broader and that higher molecular weight polymers were formed from Demnum and Krytox. We concluded from these results that degradation and cross-linking took place simultaneously. Demnum crosslinked more easily than the other fluids. The time dependence of both XPS spectra of Cls and mass spectra showed that C-O-bonded carbons in PFPE'S were removed faster than other carbons. There was no substrate effect on the degradation reaction because the first-order rate constants calculated from the change of gaseous products were similar when stainless steel (440C) and gold-coated surfaces were used. Metal fluorides were formed on stainless steel during the reaction. A mechanism for the degradation of PFPE'S is discussed on the basis of their molecular structures

No abstract available

[en] Cosmic ray data from Matsushiro underground station were analyzed for four years (1981 to 84). It is found that a marked semi-annual intensity variation has been observed in this period. Solar diurnal and semi-diurnal variations have also been observed. After correcting for the spurious sidereal diurnal variation arising from the anisotropy responsible for the solar semi-diurnal variation (Nagashima et al., 1983), it is found that the corrected sidereal diurnal variation is consistent with those so far reported

[en] A major, general purpose detector for TRISTAN was designed to detect top quark, Higgs particles, heavy leptons, heavier quarks and so on. The present design is based on a CDF detector. A superconducting solenoid magnet similar to a CDF magnet provides about 1 Tesla magnetic field. A 1 m long and 1 m diameter superconducting solenoid magnet was built and tested to study the feasibility of constructing this magnet. The central calorimeter consists of 4800 lead glass electromagnetic detectors, which covers about 80 % of the total solid angle. The lead glass counters have been chosen to get the best energy resolution for the detection of monochromatic gamma from the decay of a t anti-t state associated with a Higgs particle. For the end cap electromagnetic calorimeter, a lead-PWC sampling calorimeter of the CDF type was proposed, and if necessary, it will be replaced by a lead-liquid argon calorimeter with a better energy resolution, which requires more resources. Longitudinal segmentation and the information on radial shower distribution are required for the separation of electrons from hadrons. A MARK 2/TASSO/CLEO- type cylindrical drift chamber was proposed for the central tracking chamber. The cell width of the chamber should be about 32 mm x (40/60) x (12/15) = 17.1 mm in order to keep the same hit rate as the TASSO chamber. For the data acquisition system and electronics, a CAMAC system will be used. (Ito, K.)

[en] This report presents a conceptual design of a large solenoid for studying physics at the SSC. The parameters and nature of the detector have been chosen based on present estimates of what is required to allow the study of heavy quarks, supersymmetry, heavy Higgs particles, WW scattering at large invariant masses, new W and Z bosons, and very large momentum transfer parton-parton scattering. Simply stated, the goal is to obtain optimum detection and identification of electrons, muons, neutrinos, jets, W's and Z's over a large rapidity region. The primary region of interest extends over +-3 units of rapidity, although the calorimetry must extend to +-5.5 units if optimal missing energy resolution is to be obtained. A magnetic field was incorporated because of the importance of identifying the signs of the charges for both electrons and muons and because of the added possibility of identifying tau leptons and secondary vertices. In addition, the existence of a magnetic field may prove useful for studying new physics processes about which we currently have no knowledge. Since hermeticity of the calorimetry is extremely important, the entire central and endcap calorimeters were located inside the solenoid. This does not at the moment seem to produce significant problems (although many issues remain to be resolved) and in fact leads to a very effective muon detector in the central region