[en] It is planned to inject eleven AGS bunches into stationary buckets in the ISA, and the cavity design, the rf amplifier, capture and initial acceleration, and suppressed bucket operation are discussed. The equivalent voltage generator requirements for various operating conditions are tabulated, and a circuit for gating the final stacking process is given

[en] The outgassing rates were measured as a function of temperature for aluminum alloy tubes in an effort to test the alloy for use in the ultrahigh vacuum system of the ISABELLE Storage Rings. The activation energies of the residual gases were obtained from their temperature dependence. Various cleaning and bake-out treatments were tested, and it was found that effective outgassing rates of 1 x 10^-14 torr liters s^-1 cm^-2 could be achieved

[en] An apparatus that can be used to examine particle spectra in the intermediate angle region of 60⁰ to 5⁰ at ISABELLE is discussed. A 90⁰ detector, suitably modified, could be used for the intermediate angle region. The spectrometer and some of its modifications, needed by virtue of the larger number of particles and particles of high momentum are discussed, and a rough drawing with modifications needed for intermediate angles, is shown

[en] The phenomenon of channeling of particles through crystals and how it may be used at ISABELLE are discussed. Possible uses of the phenomenon include (1) measurement of beam profiles with a solid state counter attached to the crystal; (2) measurement of energy and intensity of particles--possibility of reduction in relativistic rise shielding (i.e., density effect); (3) providing a variable density target where the density can be varied according to the rotation angle of the crystal; (4) providing a means to do production target experiments where short lived particles produced at one nuclear site can then be targeted onto the following nucleus by aligning the crystal so that the beam is along the channel direction; and (5) providing rapid reduction of beam energy without appreciable loss of intensity

[en] There has been a great deal of discussion on construction of an electron-proton colliding beam facility at ISABELLE. Such a facility would require an electron storage ring of 15 GeV energy. It is possible that a facility with lower energy would still provide an interesting look at e-p high energy interactions, possibly at a much reduced cost. A linear electron accelerator is proposed (approximately 4 GeV) with insertion of the beam into a far end of the insertion region nearest the AGS. It is easy to match the beam size to that of the internal proton beam at ISABELLE. However, high beam currents, on the order of 0.2 A, are needed for luminosities of about 10³². The cm energy for an electron energy of 4 GeV would be 56.6 GeV. This should be more than adequate to produce a variety of interesting reactions and sufficiently higher than SLAC energies to produce new physics

[en] Beam induced gas desorption is still one of a few phenomena that determine the upper limit of the beam current in the ISR. However, proton beams of intensities beyond the design value have been stacked to date, and even further increase of beam current, and consequently luminosity, is aimed for. Since the glow discharge cleaning procedure has been implemented together with the installation of additional sublimation pumps at the center of main magnets to reduce the distance of lumped pumps, the vacuum limit, i.e., the maximum beam current stacked with a stable pressure has improved almost by one order of magnitude. There is no obvious reason why the beam induced vacuum instability could not be eliminated entirely by a continued improvement program that reduces the beam induced net desorption coefficient to almost zero or even less throughout the whole machine

[en] The magnet protection scheme considered for the ISABELLE dipoles consists of a diode assembly connected across each pair of magnets. The diode circuit provides a bypass for ring magnet current should any dipole revert to the normal state. The system is extremely simple but requires that each dipole be capable of absorbing its own stored energy plus that of the linked dipole during quench conditions

[en] Stability criteria for a machine with a smooth vacuum chamber are compared with those for a realistic machine, and the conditions that a feedback system must fulfill for damping the transverse instability are given. Machine parameters and stability criteria are tabulated

[en] There are three stability conditions that are to be satisfied during the acceleration: (1) the ratio of the bucket area to the beam area must be kept fairly close to 1 and practically constant. The rf peak voltage then depends on the choice of the harmonic number; (2) the energy gain per turn is assigned, ΔE = V sin phi/sub s/, and ΔE is small and can be a slowly varying function of the time; and (3) an impedance condition has to be satisfied. The combination of these three conditions should prescribe a reasonable choice for phi/sub s/, V, and ΔE once the harmonic number is assigned

[en] With the large stored energy in the ISA beam, particle loss in the superconducting magnet environment must be kept to a low value, and whatever unavoidable losses do occur must be absorbed in properly designed beam scraper-absorber combinations. A systematic evaluation was made of the ISA anticipated beam loss both during normal operation and due to possible component malfunctions