[en] The experimental programme at the CELSIUS ring for cooled ions is described. In the CELSIUS experiments, the recoil detector system will consist of an array of Si detector telescopes and time-of-flght telescopes

[en] Nucleon structure functions measured in high-energy muon scattering at CERN during the last decade have verified convincingly the quark picture and the theory of strong interactions, quantum chromodynamics (QCD). Structure functions of various target nuclei have been found to differ quite significantly and these differences are known under the name of the EMC effect and, at small momentum transfers as shadowing. The spin-dependent structure function has been obtained from scattering of polarized muons by polarized target protons and the result has stimulated an intense discussion on the origin of the spin of the proton. (orig.)

[en] The potential future bio-energy contribution to the global energy supply is outlined. Severe constraints have to be applied since biomass is used for many different purposes. It is likely that bio fuels from primary agricultural products may not increase much above the current 1% of all liquid motor fuels in order to secure food for people and cattle. Bio-energy from forestry should only be used wherever it is absolutely essential. Deforestation results in a net emission of CO₂ to the atmosphere that is equal to that of the Usa. Rather than to replace fossil fuels by forest bio-energy, deforestation must be halted. The management of the Swedish annual forest growth shows how a carbon sink can be developed in parallel with biomass for energy and industry. The most promising way of getting energy from biomass is to use the residues in forestry and agriculture. If this is properly done the current annual global bio-energy may double from its present value of 13,000 TWh in the next few decades. (author)

[en] This booklet addressed to the general public gives an orientation about radiation effects, radiation measures and the radiation ambience in the modern society. Health effects in Sweden from the Chernobyl accident are discussed as well as environmental/health effects from different energy sources. (L.E.)

[en] The ion cooler storage ring, CELSIUS in Uppsala, has now operated several years and provides protons up to an energy of 1360 MeV. The WASA/PROMICE collaboration has studied light-meson production in pp and pd interactions. Especially interesting are recent results on η production in pd collisions near the kinematical threshold where evidence of the N(1535) isobar and of a quasibound ηd system are seen. A wide-angle spectrometer, WASA, is being prepared for studies of rare processes, in particular photodecays and protoproduction of light neutral pseudoscalar mesons. (orig.)

[en] The CELSIUS ring at the The Svedberg Laboratory, Uppsala, is now being commissioned. The Gustaf Werner synchrocyclotron can inject into the ring, protons which are cooled, accelerated to a maximum energy of 1.36 GeV and made to interact with internal targets such as hydrogen or deuterium. Combined with a wide-angle detector for hadrons, leptons and photons, very rare meson decays can be measured and the result used for tests of the standard model. Also exotic particle searches will become possible since a very low background is anticipated around an internally circulating beam of high quality

[en] An electron storage ring in Lund and ion storage rings in Stockholm and Uppsala built during the 1980s are now in use mostly for basic research. Particle Induced X-ray Emission (PIXE) and Plasma Desorption Mass Spectroscopy (PDMS) developed and refined at Swedish van de Graaff accelerators are now standard methods. Positron Emission Tomography (PET) was developed in Stockholm and Uppsala where a new center was recently inaugurated. (author)

[en] In Deep Inelastic Scattering, DIS, a lepton interacts directly with a target quark, provided that the energy and momentum transfers are sufficient. This direct interaction hypothesis is tested in shadowing experiments where nuclear media are used to detect departures from a point-like lepton-quark interaction. The struck quark may interact with nuclear constituents before it forms a hadron. Thus hadron production in different target nuclei provides information on quark-quark and quark-nucleon interactions. The EMC effect, discovered a few years ago by the European Muon Collaboration, indicates that the quark structure in bound nucleons is different from that in free nucleons. Hence DIS may become a valuable tool for studies of nuclear structure based on constituent quarks. (orig.)

[en] Abstracts of the 31 lectures given at the meeting are presented. Major emphasis was placed on the nucleon-nucleon and nucleon-antinucleon interaction in bound and unbound systems. Four of the ten sessions were devoted to this subject. Two sessions contained lecture and seminars on 'Isobars in nuclei', two were devoted to hadron-nucleus reactions, one to high-energy heavy-ion reactions and one to new developments of experimental tools. This latter session had two talks, one about channeling with GeV particles and the other about the planned low-energy antiproton facility LEAR at CERN. Talks of more general character were 'The experimental programme at the CERN SC', 'Accelerator produced nuclear fuel' and 'The upsilons, a new family of quark-antiquark bound state'. (JIW)

[en] Monte-Carlo simulations have been performed for the purpose of investigating the energy discriminating feature of a semiconductor hybrid pixel detector at diagnostic energies. Part of the evaluation was performed using synthetic images obtained from the simulated data. (orig.)