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Cross Sections for X-Ray Photoelectron-Induced Desorption of Hydrogen Ions From Metal Surfaces

Description: We have measured the cross sections for x-ray photoelectron-induced desorption of hydrogen ions from beryllium, carbon, aluminum, tantalum, and gold surfaces. This report describes the results of the cross-section measurements, and discusses a time-of-flight technique that allows the determination of ionic-desorption cross sections as small as 10/sup -25/ cm/sup 2/ per photoelectron. 19 refs., 7 figs.
Date: September 20, 1985
Creator: Kinney, J. H.; Siekhaus, W. J. & Anderson, R. A.
Partner: UNT Libraries Government Documents Department
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SSC test lattices

Description: A set of eight test lattices for the SSC have been devised for such purposes as the investigation of the dependences of chromatic properties and dynamic aperture on the type, field, physical aperture and errors of the magnets, on the sextupole correction scheme, on the tunes and on the cell phase advances. They are distinguished from realistic lattices in that certain features of the latter are missing - most notably the crossing magnets that bring the two counter-rotating proton beams into col… more
Date: April 20, 1985
Creator: Courant, E. D.; Douglas, D. R.; Garren, A. A. & Johnson, D. E.
Partner: UNT Libraries Government Documents Department
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Guide to the Main Ring DO overpass

Description: The DO overpass is a modification of the beam orbit in Main Ring in order to better accommodate a Tevatron collider detector at DO. The orbit is moved up approx. 51 inches over most of the long straight section at DO, thus making the Main Ring the world's first non-planar proton synchrotron. A similar overpass, but with four times the displacement, is planned for the CDF detector at the BO straight section. The nominal separation between the beam orbit in the Main Ring and the orbit in the Teva… more
Date: March 20, 1985
Creator: Turkot, F.
Partner: UNT Libraries Government Documents Department
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Particle dynamics for motion in a non-planar accelerator

Description: The basic dynamics of a planar accelerator is extended to the non-planar case. This is done using the geometrical concept of torsion and extending the Hamiltonian formalism. A generalized non-planar reference orbit is adopted which introduces torsion in appropriately chosen drift spaces. The parameters of the reference orbit are associated with uncoupled and coupled betatron parameters currently in use.
Date: August 20, 1985
Creator: Antillon, A. & Month, M.
Partner: UNT Libraries Government Documents Department
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Calculations of volatilities of Hg, NH{sub 3}, and Cs-137 in the F/H Effluent Treatment Facility evaporator system

Description: An evaporator will be used in the F/H Effluent Treatment Facility (F/H ETF) to reduce the volume of effluent dispensed to Upper Three Runs Creek and to concentrate solutions from three sources in the F/H ETF before sending that waste to Saltstone. The evaporator will be fed by backwash from the filters in the filtration unit, the concentrate stream from reverse osmosis, and the solutions used in regeneration of ion exchange columns. These streams will contain small amounts of Hg, NH{sub 3}, and… more
Date: December 20, 1985
Creator: Wallace, R. M. & Bibler, J. P.
Partner: UNT Libraries Government Documents Department
open access

Fermilab Accumulator Magnets Vacuum Chamber Heating System J. Satti &

Description: The Fermi National Accelerator Laboratory (Fermilab) is building an accumulator ring to store antiprotons for high energy physics proton-antiproton collisions in the Tevatron accelerator. The accumulator ring, approximately 474 m in circumference, consists of many quadrupole and dipole magnets connected with stainless steel vacuum chambers for beam circulation. The vacuum pressure required is in the low 10{sup -10} Torr range. To reach this pressure, the vacuum chambers are baked at 300 C each … more
Date: May 20, 1985
Creator: Lee, G.
Partner: UNT Libraries Government Documents Department
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Effect of space charge and magnetic field on the interpretation of beam brightness

Description: Beam brightness has been measured experimentally using collimators and emittance selectors. The acceptance of both of these devices must be known to infer a brightness measurement. A computer code has been written to determine the effect of space charge and magnetic field on the acceptance of these devices. The region of validity of analytic acceptance formulas is investigated.
Date: August 20, 1985
Creator: Boyd, J.K.
Partner: UNT Libraries Government Documents Department
open access

Alpha-particle-driven instability of alfven waves in a tandem mirror. Final summary report, 21 February-20 May 1985

Description: Alpha particles born at D-T fusion are mirror confined in the tandem mirror due to their relatively high energy. Therefore, they have a loss-cone type distribution in the velocity space. This anisotropy is susceptible to microinstability. The objective of this work is to study the possible instability that can be driven by the alpha loss-cone. The low frequency (at the order of the ion cyclotron frequency) wave spectrum is studied to seek the waves that can be destabilized by the alphas. The ra… more
Date: August 20, 1985
Creator: Ho, S. K.
Partner: UNT Libraries Government Documents Department
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