[en] Bulk shielding calculations for the 8 GeV Synchrotron Radiation Facility in Japan are carried out for its building design. Forward and lateral calculations are performed separately. The former is based on Swanson's formulae for radiation sources of photon and muon and the latter based on Jenkin's formulae for photon and neutron. Ordinary and heavy concretes, iron, lead and earth are supposed to be applied to shields in forms of single-and/or double-layers. Calculations show almost all shields of the facility can be less than 2.0 m in depth. (author)

[en] An improved method has been developed for the measurement of internal forces in superconducting accelerator magnets, in particular the compressive stresses in coils and the end restraint forces on the coils. The transducers have been designed to provide improved sensitivity to purely mechanical strain by using bending mode deflections for sensing the applied loads. Strain gauge resistance measurements are made with a new system that eliminates sources of errors due to spurious resistance changes in interconnecting wiring and solder joints. The design of the transducers and their measurement system is presented along with a discussion of the method of compensation for thermal and magnetic effects, methods of calibration with typical calibration data, and measured effect in actual magnets of the thermal stress changes from cooldown and the Lorentz forces during magnet excitation. 13 figs., 1 tab

[en] We made a minimal set of AC magnetic measurements of the engineering model of the ALS Booster Dipole Magnet as part of the process of qualifying its design for production. Magnetic induction integrals over paths approximating electron-beam trajectories were measured with long curved coils connected to an electronic integrator. Magnetic induction was measured with point coils and an integrator and independently with a Hall-effect Gaussmeter. These quantities, and magnet current, were displayed on a commercial digital storage oscilloscope as parametric functions of time. The displayed waveforms were stored, processed and redisplayed as representations of selected magnet parameters. A waveform representing the magnet's effective-length was created by dividing the integral waveform by the magnetic induction waveform. Waveforms of the transfer functions were produced by dividing both the integral waveform and the magnetic induction waveform by the current waveform. Pairs of matched coils, connected in series opposition, provided differential measurements of field uniformity. Quadrupole and sextupole coefficients were derived from the uniformity data. These magnet parameters were measured at 2 and 10 Hz frequencies. Together with measurements of the magnetic field at selected dc levels, the ac measurements demonstrated that the magnet design met specifications and qualified it for production. 7 refs., 7 figs., 3 tabs

[en] The author describes the equipment and methods for stochastic cooling. (HSI)

[en] The paper presents the results of the calculational analysis of the multipole components of the bore field of superconducting (SC) dipoles for Accelerating and Storage complex(ASC). These components are due to various constituents of cable magnetization. It also describes the procedure of pulsed magnetic measurements allowing to determine the multipole component of the field which are due to eddy currents in the cable. Besides the article compares the calculational and experimental results, establishes the requirements to be imposed on the values of the basic electrophysical characteristics of the SC cable maintaining the tolerable level of dynamic effects in the dipoles n in the ASC cycle

[en] The concept of a magnet system for the Nuclotron is based on the following. Pulsed magnets with a cold iron yoke and a hollow superconductor winding are used. The value of the iron-shaped magnetic field in the central bore is about 2 T. The magnet surrounded by a nitrogen shield and a vacuum shell has no helium vessel. All magnets are connected in series with supply and return helium headers. Two-phase helium is used as a coolant. The magnet system of the accelerator is divided into two strings. The strings are assembled of magnet-cryostat units. Each unit is tested on the test stands

[en] Future linear colliders will require a very high peak power per meter of accelerating structure at a relatively high frequency/endash/greater than 10 GHz/endash/but at a relatively short pulse length/endash/less than 100 ns. One technique for generating the required peak power is to use a more or less conventional microwave power source, which produces power at a pulse length typically on the order of 1 μs, together with RF pulse compression. Some parameters are given for a Binary Power Multiplier (BPM) pulse compression system operating at 17.1 GHz with an output pulse length of 60 ns. The peak power gain for a three stage system is estimated to be 6.6 (82% compression efficiency). Some possible long-pulse microwave sources which/endash/when coupled with such a pulse compression system/endash/would be suitable for driving a linear collider are briefly discussed. 13 refs., 1 fig., 1 tab

[en] The magnitude and direction of the e⁺, e/sup /minus// polarization are very important parameters at PEP. During the Summer Study many polarization monitors were considered together with methods for rotating and controlling the direction of polarization. 1 fig

[en] Starting in 1978 with one small refrigerator and distribution line, the LHe system of ATLAS has gradually grown into a complex network, as required by several enlargements of the superconducting linac. The cryogenic system now comprises 3 refrigerators, 11 helium compressors, /approximately/340 ft. of coaxial LHe transfer line, 3 1000-l dewars, and /approximately/76 LHe valves that deliver steady-state flowing LHe to 16 beam-line cryostats. In normal operation, the 3 refrigerators are linked so as to provide cooling where needed. LHe heat exchangers in distribution lines play an important role. This paper discusses design features of the system, including the logic of the controls that permit the coupled refrigerators to operate stably in the presence of large and sudden changes in heat load. 8 refs., 3 figs

[en] The method for the calculation of parameters of the accelerating beam channel with HF quadrupole focusing is proposed. The approximate analytic formulae are used. The scheme of algorithm is described in general and the basic calculating formulae are proposed. Some questions of precise calculations for the accelerating beam channel characteristics are discussed. The numerical example for the optimized accelerating structure in the energy range of 2-100 MeV is proposed. 9 refs.; 5 figs