119948583
CONNECTION BETWEEN GAUGE INVARIANCE AND MASS
S>The limit, as the bare mass vanishes, of a theory of a massive neutral vector meson interacting with charged fields is investigated. A redefinition of the charged-field operators is exhibited so that the original theory, involving a positive definite metric, goes over smoothly to a radiation gage theory. The spectral forms for the boson twopoint fanction are exhibited to show that the limit to a gage-invariant theory does not restrict the interacting mass of the vector particle. A soluble example is given in which these limits can be studied in detail and in which the gage-invariant limit describes a massive vector particle. (auth)
122057941
BROKEN SYMMETRIES AND MASSLESS PARTICLES
119723627
NEW DISPERSION RELATIONS FOR PION-NUCLEON SCATTERING
124518932
SUPERCONDUCTIVITY FOR HIGH ENERGY PHYSICS AT LRL-BERKELEY.
The LRL-Berkeley superconducting program related to high energy pbsics is described in functional terms. DCn2agnets for use in accelerator experimental areas are discussed as are pulsed magnets as would be appropriate to a proton synchrotron. Fundamental studies and areas of cryogenic engineering and system investigations are outlined. -1.UCRL-19769 April 17, 1970 Superconductivity For High Energy Physics at LRL_Berkeley * W.S. Gilbert and R. Meuser a Lawrence Radiation Laboratory Berkeley, California I Introducn Superconducting magnet systems have been under study at LRLBerkeley since 1965, first in the200 BeV Accelerator Study Group, and later in the Advanced Accelerator Study Group. We here refer to magnets specifically for use with high energy accelerators and associated physics experimental areas. Other groups at LRL have built and used superconducting magnets for other uses; chemistry, inorganic materials, solid state physics, cosmic ray studies. In the course of the 200 BeV study, we investigated the relative costs and advantages of utilizing superconducting transport elements which, technoLogically, seemed to be.just coming of age. The initial studies showed that the superconducting magnets might be competitive in costs with the conventional copper and iron magnets in the experimental area but the uncertainties were larger than the indicated cost difference between the two approaches. A joint LRL-NAL superconducting program, conducted at LRL, was funded in F 1968-1969 with its major goal of reducing the uncertainties involved in using superconducting transport elements in the 200 BeV experimental areas. During Fl 1970 our major emphasis shifted to Bevatron area magnets which generally are of larger aperture and are shorter than those needed b for the 200 BeV accelerator. Cryogenic engineering, cryogenic system studiesand operational a tests comprise an important portion of our overall program. Fundamental studies of superconducting material include measurements on magnetization, flux jump stability, pulsed losses, and magnetic fields. The study and
134768087
Superconducting synchrotron-storage ring (ESCAR)
Author(s): Byrns, R.; Elioff, T.; Gilbert, W.; Green, M.; Hartwig, E.; Lambertson, G.; Lou, K.; Meuser, R.; Pope, W.; Staples, J.; Tanabe, J.; Wolgast, D.
118431021
Correction of Magnetization Sextupole in One-Meter Long Dipole Magnets Using Passive Superconductor
The generation of higher multipoles due to the magnetization of the superconductor in the dipoles of the SSC is a problem during injection of the beam into the machine. The use of passive superconductor was proposed some years ago to correct the magnetization sextupole in the dipole magnet. This paper presents the LBL test results in which the magnetization sextupole was greatly reduced in two one-meter long dipole magnets by the use of passive superconductor mounted on the magnet bore tube. The magnetization sextupole was reduced a factor of five on one magnet and a factor of eight on the other magnet using this technique. Magnetization decapole was also reduced by the passive superconductor. The passive superconductor method of correction also reduced the temperature dependence of the magnetization multipoles. In addition, the drift in the magnetization sextupole due to flux creep was also reduced. Passive superconductor correction appears to be a promising method of correcting out the effects of superconductor magnetization in SSC dipoles and quadrupoles.