[en] For TARN (Test Accumulation Ring for Numatron), two different pick-up monitors for a stochastic cooling system are considered: a helix type and a ferrite type. For the helix type probe, the calculation of the coupling impedance, which is defined by the ratio of the voltage that is induced in the probe and the beam current, has already been performed. The coupling impedance of a ferrite type probe may be derived in the similar way, however, the formulas are more complicated. The particle beam which is surrounded by a ferrite core produces a magnetic flux in this core. The time variation of this flux induces a voltage in the pick-up coil. In the paper, the derivation of the equations for the electric field for a small ferrite (metal wall matching), a magnetic field and the pick-up voltage, beam current and the coupling impedance, field matching at the ferrite core and discussion on the matching condition are described. The results of the calculation are shown in several figures. The conclusion of these calculation is as follows: in order to achieve a high coupling impedance by the use of a ferrite pick-up probe, the ferrite core should be as close to the beam as possible; it is desirable to choose a material with a smooth decrease of μ versus frequency. Under these conditions, an improved coupling impedance as compared to that of the helix monitor is achievable. (Wakatsuki, Y.)

[en] The personnel lock for a plant with increased security requirements, e.g. a nuclear power plant, has got two lock gates. Only persons whose right to enter has been established by the control equipment will be admitted to the lock chamber. For this purpose an identification recess is built in front of the first access to the lock chamber, where size, weight and the contours of the persons wanting to enter are roughly measured and compared with a code card carried along. The weight is established by a balance forming part of the base of the recess. By means of contact surfaces in the region of knees, upper thigh, chest and shoulder an upright position of the person is guaranteed. Scanning of the physical dimensions is performed with laser, infrared and light barriers. (DG)

[en] At the heavy-ion accelerator complex f GSI an intensity-upgrade program is under way with the goal to fill the synchrotron SIS up to the space charge limit for all ions up to uranium. This project will increase the beam intensity especially for heavy ions by two orders of magnitude compared to the present situation. This upgrade program includes various steps: ion source development, combined electron cooling and multiturn-injection at the synchrotron SIS and the replacement of the UNILAC prestripper structures by RFQs and IH-structures. (author)

[en] The ion beam therapy facility HICAT presently under construction at the Heidelberg University Clinic will be the first clinical irradiation facility for heavy ions in Europe. Its capacity should enable the treatment of 1000 patients per year. The use of different ion species ranging from protons to oxygen under identical conditions should clarify the question of which particle species is best suited in terms of indication. A synchrotron will accelerate the particles to energies corresponding to water-equivalent ranges from 2 cm to 30 cm. An intensity-controlled raster scanning technique will be used to optimize the use of the favorable depth dose distribution of ions. The planned heavy-ion gantry will be the first world-wide. The facility should be complete in 2006. (orig.)

[en] A specific computer code has been developed to investigate ion optical properties of a new generation of pulsed strip-line high current magnets. The code is based on a modern 'Differential Algebra' computational technique and it is able to calculate transfer matrices of pulsed strip-line magnets up to arbitrary order. The realistic three-dimensional distribution of the magnetic field in pulsed lenses as well as all the fringing field effects are taken into account in the simulations. We have demonstrated, that for precise description of such magnets one cannot use the existing ion optical codes where ideal multipole field distributions and fringing fields, typical for conventional iron-dominated magnets are assumed. The transfer matrix elements of pulsed strip-line lenses differ significantly from those of conventional magnets, especially in higher orders

No abstract available

[en] The Experimental Storage Ring ESR, presently under construction at GSI-Darmstadt, will be used for atomic and nuclear physics experiments with cooled beams of heavy ions. Interaction between beam particles and internal target atoms or free electrons, e.g., in the electron cooler beam, will be studied. Numerous atomic or nuclear processes cause moderate jumps of the charge-to-mass ratio of projectile recoils. This paper discusses the selective extraction of these special recoils out of the storage ring, where detection or additional analysis of kinematic parameters may be carried out. On the other hand, especially for heavy ion storage rings, the described method seems to be a valuable alternative to conventional resonant beam extraction techniques

[en] Both the open-quotes Heavy-Ion Synchrotronclose quotes (SIS) and the open-quotes Experimental Storage Ringclose quotes (ESR) are designed for beam accumulation and beam extraction. The concepts are different in each machine according to the specific beam-properties and requirements. In this article a summary of the technical realization of the injection and extraction systems and the operation results are given

[en] This paper reports on the design of the Experimental Storage Ring (ESR) which is under construction at GSI, has to fulfill the following requirements: injection of the beam from the heavy ion synchrotron SIS with a maximal emittance of 20 πmm mrad; injection of secondary beams from the Fragment Separator with a maximal momentum spread of ±0.35% and a transverse beam emittance of 20πmm mrad; and fast extraction of the beam back to SIS. The main component for these injection-/extraction procedures is the fast kicker magnet, which will be used both for injection and extraction and which also allows injection while a cooled stacked beam is circulating in the ring (accumulation). The most crucial operating mode with respect to the design of the kicker is the injection of the beam from the fragment separator

[en] Electron cooling of heavy ions has been studied at the storage ring ESR over the whole range of ions up to bare uranium. Systematic measurements of the ion beam temperature evidence a dependence on the particle number which proves an equilibrum between cooling and heating by intrabeam scattering. Measurements of the longitudinal intrabeam scattering rate and of the longitudinal cooling force provide information about the longitudinal cooling times. Small deviations of the longitudinal cooling time from the theoretically predicted A/Z² - dependence are found