110465389
Mechanical Design of Compressor Test Apparatus for Electron Ring Accelerator Research
The mechanical and vacuum features of the Compressor II apparatus used in the Fall 1968 Electron Ring Accelerator (ERA) experiment are described. Included are the injection beam transport system, the coils and their support structure, the ceramic vacuum chamber and its pumping system, the gas injection system, and diagnostic probes. The coil arrangement for the upcoming Compressor III experimental apparatus is briefly presented.
33708694
Acceleration of Uranium at the Bevalac
Recent upgrading projects have extended the mass range of particles that can be accelerated at the Bevalac to include any element of the periodic table to energies above 1 billion electron volts per atomic mass unit. This capability was verified on 11 May 1982 with the production of a uranium beam at 147.7 million electron volts per atomic mass unit.
41238054
PEP Insertion Quadrupole Design Features
The insertion quadrupoles for the PEP storage ring must have a very uniform gradient to focus the circulating beams to a very small size at the interaction point for high luminosity. Quads have been built which achieve the desired field within the full pole aperture radius to approximately one part in 104. The design features which permitted this achievement are described.
111218115
Controlling Accelerator Engineering Costs
Cost control for accelerator engineering involves task definition, planning related expenditures, measuring progress, tabulation of costs and projections, and, most important of all, follow-up for corrections. Accelerator engineering costs are best regulated by the accelerator engineer, since those who are in any way detached from the work cannot exercise the most effective control. The accelerator engineer should be assisted by providing him with an effective system, appropriate forms and reports, and administrative support.
117723646
ROCK EXCAVATION BY PULSED ELECTRON BEAMS
If an intense short pulse of megavolt electrons is deposited in a brittle solid, dynamic spalling can be made to occur with removal of material. Experiments were made on several types of hard rock; results are reproducible and well-described theoretically. An accelerator with a rapidly-pulsed scanning electron beam was designed that could tunnel in hard rock about ten times faster than conventional drill/blast methods.
107968565
MBE-4: an induction linac experiment for heavy ion fusion
The multiple-beam induction linac approach to a heavy ion fusion driver features continuous current amplification along the accelerator and a minimum of transverse beam manipulation from source to pellet. Current amplification and bunch length control require careful shaping of the accelerating voltages. This driver approach exploits developments in electron induction linac technology that have occurred within the last 15 years at LBL, LLNL and NBS. MBE-4 is a four beam induction linac that models much of the accelerator physics of the electrostatically focused section of a considerably longer induction accelerator. Four parallel Cs/sup +/ beams are electrostatically focussed and will be accelerated from 200 keV to approximately one MeV when the experiment is complete in the spring of 1987. The current in each of the four beams will increase from 10 to 40 mA due to both increase in beam speed and shortening of the bunch length. Results of experiments with the injector and first eight accelerating gaps are presented.
120827387
A measurement of A20 (1320) formation in photon photon collisions
123222571
Measurement of the photon structure function F(2) (gamma) (X, Q**2) between 10-GEV**2 < Q**2 < 60-GEV**2
124490005
An experimental study of spin 1 mesons produced in two photon reactions
119387313
Charged hadron production at high X in E+ E- annihilation at S**(1/2) = 29-GEV
120023840
Study of two photon production of rho0 omega in e+ e- interactions