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Transverse Two-Stream Instability in the Presence of Strong Species-Species and Image Forces

Description: The theory of coherent transverse oscillations of two particle species is extended to include strong species-species and image forces. It is shown that in general the species-species force can considerably alter the instability threshold. Conversely, it is shown that the limit on the performance of an electron ring accelerator imposed by the requirement of stable ion electron oscillations, is not significantly improved by the inclusion of images.
Date: September 1972
Creator: Laslett, L. J.; Sessler, A. M. & Mohl, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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On the Performance Characteristics of Electron Ring Accelerators

Description: On the basis of our present understanding of the physical phenomena involved in an electron ring accelerator (ERA), a theoretical study is made of the performance which might be expected for an ERA. Rigorous upper bounds are obtained on the rate of energy gain, from which it is shown that, in order to prevent azimuthal instability, parameters must be selected such that (for reasonable fields, injector properties, etc., but with no safety factors) the proton energy gain is less than 80 MeV/m. Nu… more
Date: September 1, 1972
Creator: Mohl, D.; Laslett, L. J. & Sessler, A. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field quality of the end sections of SSC (Superconducting Super Collider) dipoles

Description: The central or two-dimensional field of a dipole magnet can be calculated with some precision. The fields at the end of the magnet, which are three-dimensional in nature, provide a more complicated problem. Starting with an end design that produced a relatively good end in terms of multipole components, a method of extending parts of the straight section was used to reduce the most important harmonics, the sextupole and decapole, to a negligible level. In addition, the effect of extending an ir… more
Date: September 1, 1986
Creator: Hassenzahl, W. V.; Caspi, S.; Gilbert, W.; Helm, M.; Laslett, L. J. & Morgan, G. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of a 40 mm bore magnet cross section with high field uniformity for the 6. 6T SSC dipole

Description: The SSC requires a very uniform dipole field. A 40 mm bore diameter winding cross section has been developed which has computed multipole coefficients less than 1 x 10/sup -6/ of the dipole field at 10 mm radius for an operating field of 6.6T at 4.35 K. This cross section has 4 conductor blocks (3 wedges, 16 turns) per quadrant in the inner layer, and two blocks (1 wedge, 20 turns) in the outer layer. ''Partially keystoned'' cable is used; the inner cable has 23 strands of .0318 inch diameter w… more
Date: September 1, 1986
Creator: Caspi, S.; Gilbert, W.; Helm, M.; Laslett, L. J. & Taylor, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The effects of filament magnetization in superconducting magnets as calculated by POISSON

Description: Magnetization of superconducting material can be introduced into POISSON through a field dependent permeability table (in the same way that iron characteristics are introduced). This can be done by representing measured magnetization data of the increasing and decreasing field by two independent B-..gamma.. curves (..gamma.. = 1/..mu..). Magnetization curves of this type were incorporated into the current regions of the program POISSON and their effect on the field coefficients observed. We hav… more
Date: September 1, 1986
Creator: Caspi, S.; Gilbert, W. S.; Helm, M. & Laslett, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The use of harmonics in 3-D magnetic fields

Description: Motivated by the need for new means for specification and determination of 3-D fields that are produced by electromagnetic lens elements in the region interior to coil windings and seeking to obtain techniques that will be convenient for accurate conductor placement and dynamical study of particle motion, the authors have generalized the representation of a 2-D magnetic field to 3-D. They have shown that the 3-D magnetic field components of a multipole magnet in the curl-free divergence-free re… more
Date: September 1, 1993
Creator: Caspi, S.; Helm, M. & Laslett, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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