Fabrication of microstructures by X-ray deep lithography (XRDL), galvanoforming, and plastic molding (German acronym LIGA) has made its way from Forschungszentrum Karlsruhe to many labs throughout the world. The acronym ANKA stems from Angstrom and Karlsruhe to indicate the main spectral range and the location. ANKA is designed to satisfy the needs of XRDL as well as of X-ray analysis, in particular, of microstructures. Industrial demand of service in both fields will play a major role for ANKA. The main design parameters of the storage ring are an electron energy of 2.5 GeV, magnetic field of 1.5 T, and an ensuing characteristic wavelength of 0.2 nm. The lattice has fourfold symmetry with four dispersion-free straight sections, each about 4 m long. The optics is a double DBA structure with four 22.50 bending magnets per cell resulting in a compact medium-emittance design with a circumference of 97.2 m and an emittance in the range of 40 to 80 nmrad. Four 500 MHz RF cavities are placed one in the middle of each cell. In this way, only one straight section is needed for injection leaving three for optional insertion devices. Electron current will be 200 mA in a first phase. Lifetime will exceed 17 h. Dynamic aperture is large enough to insert wigglers and wavelength shifters and to double the current when upgrading the RF system. 14 out of 32 available bending magnet radiation ports will be equipped with beamlines in the first phase.

This KfK Synchrotron Radiation Source is designed to be a 2.5 GeV electron storage ring with circulating current 100 mA and critical radiation wavelength 0.2 nm. The storage ring consists of dipoles and quadrupoles. The prototype dipole magnet has been built by Efremov Research Institute, Russia and will be delivered in KfK, Karlsruhe at the end of June this year. A magnetic measurements facility has been set up for magnetic field mapping, which includes Hall probe field mapping and rotating coil harmonic analysis system. The results of the measurements are shown.

A magnetic ring designed for transforming heavy-ion charge states (up to Xe) with an energy of 1 MeV/n is described. This ring consists of four dipole magnets (M1, M2) with uniform field and edge focusing. To provide necessary dispersion, there are also two quadrupoles. The operating principle of this so-called booster ring is presented, and a splitter-magnet for ion extraction with the selected charge is also described.<>

The tuning of the linear accelerator of the Moscow meson factory is about to be completed. The kaon factory is the next step after the Meson factory. In the proposal for the Moscow kaon factory the linear accelerator of the meson factory is to be used as the injection for the booster. The main ring is filled during the 40-ms flat bottom magnetic field. The main ring accelerates 9.3*10/sup 13/ protons per pulse from 7.5 GeV to 45 GeV during a period. The reset of the field in the main ring takes 30 ms, and thus one cycle is 120 ms long, for a repetition rate of 8.3 Hz. The extender is needed for slow extraction with 100% duty cycle.< >

A previously proposed slow extraction technique has been adapted for application to the Moscow Meson Facility. This technique is based on the excitation of radial betatron oscillations while the beam is being gradually shifted onto the thin target. This method has been used to extract protons from weak-focusing synchrotrons. Its possibilities are disclosed in present-day strong-focusing magnetic rings. The essence of this method is the reduction of particle momentum by some magnitude during single crossing of a thin condensed target. The main characteristics of the Moscow Meson Facility proton storage ring are given.< >

Summary Some details of particle storage in an isochronous magnetic ring with the goal of linac pulse compression are outlined. Bun- ched beam structure is maintained without RF bunching system. The distortions of isochro- nous circulation are studied. The numerical calculations refer to the Moscow meson faci- lity storage ring.

The time structure of the accelerated H- beam of Moscow meson factory is defined by technical features of linear acceleration and inadequate to the demands of a considerable part of the physics program envisaged. A new type of a magnetic ring for ion pulse time structure transformation is proposed. The most essential operating modes are as follows: 1) the compression of every stored pulse up to th...

A non-linear theory of multicharged ion cyclic motion is presented in the report, the charge q, being considered a discretely changing parameter. Expressions for ion closed orbits are found to an accuracy of ~(Δq/qo)2, where |Δq| is the charge spread near the mean value qo. Conditions of magnetic structure chromaticity compensations are also formulated to the same approximation. The study is made in an easy-to-use form, which may be directly applied to studying monocharged beam dynamics at high momentum spreads.

The present status of the accelerator--storage-ring complex at the Institute of High Energy Physics is reported. Construction of a two-stage synchrotron of length about 20 kilometers is planned. The first stage is a slow booster, and the second stage contains superconducting magnets with a maximum field strength 5 teslas, which corresponds to an energy 3 TeV. The possibilities of obtaining colliding beams of various types are discussed.