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in publisher: "Lawrence Berkeley Lab., CA USA. Accelerator and Fusion Research Div."  
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Experiments and prospects for induction linac drivers

Description: In the last three years, the US program in Heavy Ion Fusion has concentrated on understanding the induction linac approach to a power-plant driver. In this method it is important that the beam current be maximized throughout the accelerator. Consequently, it is crucial to understand the space-charge limit in the AG transport system in the linac and, also, to achieve current amplification during acceleration to keep pace with the kinematical increase of this limit with energy. Experimental resul… more
Date: May 1, 1986
Creator: D., Keefe
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Highlights of the heavy ion fusion symposium

Description: The current status and prospects for inertial confinement fusion based on the use of intense beams of heavy ions will be described in the light of results presented at the International Symposium on Heavy Ion Fusion, (Washington, DC, May 27-29, 1986).
Date: July 1, 1986
Creator: Keefe, D.
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Partner: UNT Libraries Government Documents Department
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MEVVA ion source for high current metal ion implantation

Description: The MEVVA (Metal Vapor Vacuum Arc) ion source is a new kind of source which can produce high current beams of metal ions. Beams of a wide range of elements have been produced, spanning the periodic table from lithium up to and including uranium. The source extraction voltage is up to 60 kV, and we are increasing this up to 120 kV. A total ion beam current of over 1 Ampere has been extracted from the present embodiment of the concept, and this is not an inherent limit. The ion charge state distr… more
Date: July 1, 1986
Creator: Brown, I. & Washburn, J.
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Partner: UNT Libraries Government Documents Department
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Impedance of a beam tube with antechamber

Description: A beam vacuum chamber was proposed to allow synchrotron light to radiate from a circulating electron beam into an antechamber containing photon targets, pumps, etc. To determine the impedance such a geometry would present to the beam, electromagnetic measurements were carried out on a section of chamber using for low frequencies a current-carrying wire and for up to 16 GHz, a resonance perturbation method. Because the response of such a chamber would depend on upstream and downstream restrictio… more
Date: August 1, 1986
Creator: Barry, W.; Lambertson, G.R. & Voelker, F.
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Partner: UNT Libraries Government Documents Department
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Effects of wigglers and undulators on beam dynamics

Description: Synchrotron light facilities are making ever increasing use of wigglers and undulators, to the extent that these devices are becoming a significant part of the beam optical system of the storage ring itself. This paper presents a theoretical formulation for investigating the effect of wigglers and undulators on beam dynamics in the approximation that the wiggler parameter, K, divided by ..gamma.. is a small number and that the number of wiggler periods in one device is large. In addition to the… more
Date: August 1, 1986
Creator: Smith, L.
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Partner: UNT Libraries Government Documents Department
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Preliminary design of a 10 MV ion accelerator

Description: At the low energy end of an induction linac HIF driver the beam current is limited by our ability to control space charge by a focusing system. As a consequence, HIF induction accelerator designs feature simultaneous acceleration of many beams in parallel within a single accelerator structure. As the speed of the beams increase, the focusing system changes from electrostatic to magnetic quadrupoles with a corresponding increase in the maximum allowable current. At that point the beams are merge… more
Date: June 1, 1986
Creator: Fessenden, T. J.; Celata, C. M.; Faltens, A.; Henderson, T.; Judd, D. L.; Keefe, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced concepts for acceleration

Description: Selected examples of advanced accelerator concepts are reviewed. Such plasma accelerators as plasma beat wave accelerator, plasma wake field accelerator, and plasma grating accelerator are discussed particularly as examples of concepts for accelerating relativistic electrons or positrons. Also covered are the pulsed electron-beam, pulsed laser accelerator, inverse Cherenkov accelerator, inverse free-electron laser, switched radial-line accelerators, and two-beam accelerator. Advanced concepts f… more
Date: July 1, 1986
Creator: Keefe, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SuperHILAC Upgrade Project

Description: A high current MEtal Vapor Vacuum Arc (MEVVA) ion source is to be installed in the third injector (Abel) at the SuperHILAC, representing the first accelerator use of this novel ion source. The MEVVA source has produced over 1 A of uranium in all charge states, with typically more than 100 electrical mA (emA) of U/sup 5 +/. A substantial fraction of this high current, heavy ion beam must be successfully transported to the entrance of the Wideroe linac to approach the 10 emA space-charge output l… more
Date: June 1, 1986
Creator: Feinberg, B. & Brown, I.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Induction linacs

Description: The principle of linear induction acceleration is described, and examples are given of practical configurations for induction linacs. These examples include the Advanced Technology Accelerator, Long Pulse Induction Linac, Radial Line Accelerator (RADLAC), and Magnetically-Insulated Electron-Focussed Ion Linac. A related concept, the auto accelerator, is described in which the high-current electron-beam technology in the sub-10 MeV region is exploited to produce electron beams at energies perhap… more
Date: July 1, 1986
Creator: Keefe, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Parameter studies of candidate lattices for the 1-2 GeV synchrotron radiation source

Description: This document discusses the implications of various collective phenomena on the required performance of candidate lattices for the LBL 1 to 2 GeV Synchrotron Radiation Source. The performance issues considered include bunch length, emittance growth, and beam lifetime. In addition, the possible use of the 1 to 2 GeV Synchrotron Radiation Source as a high-gain FEL is explored briefly. Generally, the differences between lattices are minor. It appears that the most significant feature distinguishin… more
Date: January 13, 1986
Creator: Zisman, M. S.
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Partner: UNT Libraries Government Documents Department
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Generation of oxygen, carbon and metallic ion beams by a compact microwave source

Description: A small microwave ion source fabricated from a quartz tube and enclosed externally by a cavity has been operated with different geometries and for various gases in a cw mode. This source has been used to generate oxygen ion beams with energy as low as 5.5 eV. Beam energy spread has been measured to be less than 1 eV. By installing different metal plates on the front extraction electrode, metallic ion beams such as (Be, Cu, Al, etc.) can be produced.
Date: July 1, 1986
Creator: Walther, S. R.; Leung, K. N.; Ehlers, K. W. & Kunkel, W. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preliminary results from MBE-4: a four beam induction linac for heavy ion fusion research

Description: Preliminary results are presented from a scaled experimental multiple beam induction linac. This experiment is part of a program of accelerator research for heavy ion fusion. It is shown that multiple beams can be accelerated without significant mutual interaction. Measurements of the longitudinal dynamics of a current-amplifying induction linac are presented and compared to calculations. Coupling of transverse and longitudinal dynamics is discussed.
Date: May 1, 1986
Creator: Fessenden, T. J.; Judd, D. L.; Keefe, D.; Kim, C.; Laslett, L. J.; Smith, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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