114809658
Magnet coil electrical gaskets of high compliance and ampacity
Coils employed in the magnets of the PHENIX Detector, presently under construction for RHIC (Relativistic Heavy Ion Collider) at the Brookhaven National Laboratory, are massive (weight {approximately} 8000 kG each). For that reason we subdivided them into a series of manageable subcoils that we will subsequent bolt together. Electrical terminals attached to the subcoils conductors are rigidly embedded and precisely located during vacuum impregnation. However; we anticipate some misalignment and nonuniform gaping to occur between terminals at assembly. We have elected to use electrical gaskets of compliance and ampacity between the bolted terminals to enhance the current carrying capability of the electrical joints. This paper describes the material candidates selected, the tests performed, and the relative ranking of the materials tested.
118956013
Beam-dump/diagnostics box for a 10-kA 50-MeV, 50-ns electron beam
We have developed a dump for the ATA beam that consists of a series of carbon plates whose collective thickness totals approximately 1.5 ranges at 50 MeV. The energy dissipated in the plates is radiated to a water-cooled wall. The dump is designed to dissipate up to 175 kW of average power. A small hole along the axis of the plates forms a beamlet that passes through an energy analyzer. The analyzer consists of a 60/sup 0/ bending magnet and two high-sensitivity beam-current/position monitors. The ratio of the beamlet current to full current is used to estimate the beam emittance.
122505813
Comment on Coleman's theory of gravitation
The similarity of Coleman's theory (see abstr. A66860 of 1971) to a special case of a class of theories presented by Papapetrou (1954) is discussed.
123501567
Bianchi IV metric with electromagnetic field
An exact solution of the Einstein equations with an electromagnetic field source and Bianchi IV symmetry is described. This solution possesses, in the limiting case of vanishing source tensor, a previously discovered vacuum metric.