[en] This collection of 14 essays addresses arms control issues at both global and regional levels. The relationship between Australian uranium exports and nuclear weapons proliferation and Australia's role in a Comprehensive Test Ban are discussed

[en] Within the framework of the European Fusion Technology Programme the Karlsruhe Nuclear Research Centre has been awarded a contract for the development of cryosorption panels for compound cryopumps of the NEt plasma exhaust pumping system. This task includes the development of a bonding technique for porous sorbent materials with metal substrates and a test programme for development and optimization of cryopanels. A variety of material combinations for sorbent, bonding and substrate were evaluated and listed in a test matrix. Bonding tests involving soldering, cementing and plasma spraying techniques have been carried out

No abstract available

[en] High energy electrons produced by resonance absorption carry the CO₂ laser energy absorbed in a laser fusion pellet. The symmetrization that can be achieved by lateral transport of the hot electrons as they deposit their energy is discussed. A K/sub α/ experiment shows a surprising symmetrization of energy deposition achieved by adding a thin layer of plastic to a copper sphere. Efforts to numerically model this effect are described

[en] Short communication

[en] Engineering work related to the development of salt transport separations is under way. In the initial tests, attention was focused on the transfer of uranium, of ~6 kg of uranium oxide and ~0.5 kg of oxides of cerium, zirconium, molybdenum, palladium, and ruthenium. These tests were conducted in pilot-plant equipment originally used in the studies of the EBR-II skull reclamation process (ANL-7125, pp. 32-35). The objectives of these experiments were to demonstrate the feasibility of salt transport separations, to identify the major engineering problems involved, to determine the fission product decontaminations obtainable, and to provide a clearer understanding of the salt transport step.

[en] The helium-containing plasma exhaust gases of Tokamaks can be pumped by cryopumps using cryosorption panels coated with solid porous materials. The best pumping characteristics are achieved with activated charcoal and molecular sieves at temperatures below 10 K. In order to select the most suitable material with respect to cryosorption properties and reaction behaviour, comparative tests on various molecular sieve types differing in cavity structure, pore size and polarity were carried out. Nitrogen and helium adsorption isotherms were determined at LN₂ temperature and at 14.5 K, respectively, expecting that an extrapolation mechanism between the adsorption properties of both gases on molecular sieves could be obtained. For investigating the reactivation behaviour, molecular sieves were saturated with water prior to testing and outgassed at temperatures ranging from 100^oC to 400^oC. (Author)

[en] Methods of algebraic quantum field theory are used to classify all field- and observable algebras, whose common germ is the U(1)-current algebra. An elementary way is described to compute characters of such algebras. It exploits the Kubo-Martin-Schwinger condition for Gibbs states. (orig.)

[en] The tritium fusion fuel cycle has to be based upon well proven technology to assure the safe handling of tritium along with credible accountancy, low tritium inventory, low generation of wastes and a high reliability of all components throughout the lifetime of the reactor. A coherent understanding of all the equipment and process details covering conceptual studies to technical scale experiments together with mathematical modeling is therefore indispensable. Corresponding research is therefore on-going in various laboratories around the world. The cryo-pumping systems for Torus exhaust and neutral beam injectors have been tested to confirm fast regeneration scenarios and to reduce the accumulation of semi-permanent inventories of tritiated impurities. A comprehensive program to test the integrated three step (permeation, chemical impurity processing and isotopic exchange) process for Torus Exhaust Processing was carried out in the last decade. An integrated concept for the Isotope Separation (ISS) and Water Detritiation systems (WDS) has been developed and is under investigation on relevant scale. A fast delivery, self-assay storage bed has been developed and is under testing. (author)

[en] We propose to measure pion electroproduction off ¹H, ², ¹²C, ⁶⁴Cu, and ¹⁹⁷Au, and extract the pion transparency through the nuclear medium between Q² = 1 and 5 (GeV/c)². The pion transparency is predicted to be a signature of the onset of nuclear filtering and/or Color Transparency. Recent experiments have reported evidence for Color Transparency effects at Q² approx 10 (GeV/c)². The occurrence of nuclear filtering could potentially explain the apparent discrepancy between (proton) nuclear transparencies found in quasielastic A(e,e'p) and A(p,2p) experiments. The occurrence of these effects is an effective signature of the approach to the factorization regime in meson electroproduction experiments, necessary for the access to Generalized Parton Distributions. Measurable effects of approx. 40% are predicted for this region of Q². The proposed experiment seeks to measure the pion transparency with 5-10% uncertainties, dominated by systematics, up to Q² = 5 (GeV/c)²