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Report of workshop on Windowless Gas Phase Beam Line at the National Synchrotron Light Source, June 29, 1979

Description: A workshop was held on the 29th June 1979 to present the design of the Windowless Gas Phase Beamline for the National Synchrotron Light Source and to discuss the proposed research to be performed using this equipment. Participants included scientists from the Brookhaven National Laboratory, Oak Ridge National Laboratory, Yale University, the University of Rochester, and United Technologies Research Center. The report summarizes the presentations that were made and also includes contributions fr… more
Date: January 1, 1979
Creator: Grover, J. R.; Klemm, R. B. & Mitchell, J. B. A. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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UNISOR facility: recent developments and future directions

Description: The UNISOR isotope separator is described. This facility is presently on line to the Oak Ridge Isochronous Cyclotron, and will also be on line to a 25-MV folded tandem accelerator when the latter is completed. Intended primarily for the study of nuclei far from stability by means of radioactive-decay spectroscopy, the facility is designed and has been expanded to do multiple experiments simultaneously. This ability makes possible the completion of many studies that can expose the systematic beh… more
Date: January 1, 1979
Creator: Spejewski, E.H. & Mlekodaj, R.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Formulary for MEQALAC design

Description: From the space-charge limits for quadrupole transport systems discussed in an earlier report, some simple relations are obtained that will assist in the design of practical systems.
Date: November 27, 1979
Creator: Maschke, A.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible lower limit to licac emittance

Description: Numerical calculations made by several groups have always shown that an asymptotic lower exit emittance exists for linacs operating with high beam current as the input emittance is reduced to zero. In this paper, a mechanism for this limit is shown to be spread in the betatron frequencies of the individual particles due to the combination of space charge and rf gap forces, causing different transverse trajectories correlated with the instaneous longitudinal position of the particle. These traje… more
Date: March 1, 1979
Creator: Staples, J. W. & Jameson, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High purity radioactive beams at the bevalac

Description: Peripheral nuclear fragmentation reactions of primary Bevalac heavy ion beams are used to produce secondary beams of radioactive nuclei. The large cross section and small deflection of the projectile fragments lead to high production and delivery efficiency for these beams. Dispersive beam transport allows good separation and purification of the desired secondary beams. /sup 11/C and /sup 19/Ne beams of high purity and good intensity (almost 0.2% of the primary beam current) are presently being… more
Date: March 1, 1979
Creator: Alonso, J. R.; Chatterjee, A. & Tobias, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial operation of SSRL wiggler in spear

Description: A 3 lambda planar, magnetic wiggler has been designed, built, installed and operated in the SPEAR storage ring. Its primary purpose is to provide tunable synchrotron radiation (SR) with a higher energy and intensity than previously available for a new SR beam line just commissioned at the Stanford Synchrotron Radiation Laboratory. Because the magnet operates from 0-18 kG, it should also produce undulator radiation (UR). Since the wiggler influences storage ring operation in both single beam and… more
Date: March 1, 1979
Creator: Berndt, M.; Brunk, W.; Cronin, R.; Jensen, D.; Johnson, R.; King, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam profiles from multiple aperture sources

Description: Using a rapidly convergent approximation scheme, formulas are given for beam intensity profiles everywhere. In the first approximation, formulas are found for multiple aperture sources, such as a TFTR design, and integrated power for rectangular plates downstream for Gaussian beamlets. This analysis is duplicated for Lorentzian beamlets which should provide a probable upper bound for off-axis loading as Gaussian beamlets provide a probable lower bound. Formulas for beam intensity profiles are f… more
Date: February 1, 1979
Creator: Whealton, J.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stability of intense transported beams

Description: At the previous National Accelerator Conference, the transport of intense ion beams, with particular reference to Heavy Ion Fusion, was analyzed by finding matched solutions of the coupled envelope equations. This work established relations between lattice structure, beam dimensions and space-charge tune depression as a function of intensity. An investigation of the stability of the K-V distribution in transport by a periodic quadrupole system, a generalization of Gluckstern's analysis for a co… more
Date: March 1, 1979
Creator: Laslett, L.J. & Smith, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sandia's Particle Beam Fusion Program

Description: Sandia's Particle Beam Fusion Program is investigating pulsed electron and light ion beam accelerators, with the goal of demonstrating the practical application of such drivers as igniters in inertial confinement fusion (ICF) reactors. Recent developments in the program are described. Traditionally, two requirements of ICF reactor operation have been the most difficult to satisfy in conceptual designs. Adequate standoff of critical components from damaging pellet emissions must be assured, and … more
Date: January 1, 1979
Creator: Sweeney, M.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High field superconducting beam transport in a BNL primary proton beam

Description: Construction of a slow external beam switchyard at the BNL AGS requires a rapid 20.4/sup 0/ bend in the upstream end of the beam line. Two curved superconducting window dipole magnets, operating at 6.0 T and about 80% of short sample magnetic field, will be utilized with two small superconducting sextupoles to provide the necessary deflection for a 28.5 GeV/c primary proton beam. Because the magnets will operate in a primary proton beam environment, they are designed to absorb large amounts of … more
Date: January 1, 1979
Creator: Allinger, J.; Brown, H. N.; Carroll, A. S.; Danby, G.; DeVito, B.; Glenn, J. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutral molecule desorption from SS(304) and Al(6061) due to particle bombardments

Description: The pressure in both electron and proton storage rings is dependent on the particle wall bombardment molecular desorption rates due in one case (proton storage rings) to approx. keV ions while in the other to approx. 100 eV electrons. Also in order to minimize secondary electron amplification effects in both types of machines the secondary electron emission coefficient should be as low as possible. The above quantities have been measured on Al(6061) and SS(304) materials having had various trea… more
Date: January 1, 1979
Creator: Edwards, D. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radio frequency quadrupole accelerating structure research at Los Alamos

Description: The results of studies of radio frequency quadrupole accelerating structures are presented. Measurements indicate that this is a promising structure for transporting and accelerating ion beams in the energy region of 50 KeV to 2 MeV.
Date: January 1, 1979
Creator: Potter, J. M.; Williams, S. W.; Humphry, F. J. & Rodenz, G. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tests of the intense neutron source (INS) prototype. [250 mA H/sup +/ beam at 125 keV]

Description: A prototype of the INS accelerator system was constructed to produce an intense dc beam of protons at energies up to 200 keV. Using a Pierce geometry accelerating system, a 250-mA dc beam of hydrogen ions was extracted at an energy of 125 keV from an annular duoplasmatron. Of this beam, 100 mA of H/sup +/ ions were transported into a 1-cm-diam supersonic jet target, with backstreaming gas minimized by differential pumping. Both the jet target and the differential pumping system functioned satis… more
Date: January 1, 1979
Creator: Armstrong, D. D.; Emigh, C. R.; Hyde, J. C.; Meyer, E. A. & Schneider, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Secondary beam line phase space measurement and modeling at LAMPF

Description: Hardware and software have been developed for precision on-line measurement and fitting of secondary beam line phase space parameters. A system consisting of three MWPC planes for measuring particle trajectories, in coincidence with a time-of-flight telescope and a range telescope for particle identification, has been interfaced to a computer. Software has been developed for on-line track reconstruction, application of experimental cuts, and fitting of two-dimensional phase space ellipses for e… more
Date: January 1, 1979
Creator: Floyd, R.; Harrison, J.; Macek, R. & Sanders, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Bench measurements of the loss impedance for PEP beam line components

Description: Bench measurements of the parasitic model loss parameter k, due to the interaction of a bunched beam with discontinuities in the vacuum pipe, are presented for many of the PEP beamline components. The measurements were made using the pulsed, coaxial transmission method of Sands and Rees. Full-scale machined and sheet metal models containing tapers, gaps, tanks (cavities) collimators, plates, electrodes and other irregular shapes were investigated. Accuracies, errors and modeling difficulties ar… more
Date: March 1, 1979
Creator: Weaver, J. N.; Wilson, P. B. & Styles, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ion source and transport system for BNL-HIF pre-accelerator

Description: The operating characteristics of the ion source and of an initial model transport system developed by the Heavy Ion Fusion group at BNL will be presented. The purpose of the assembly was to transport a 30 mA beam of heavy ions a few feet inside a small, inexpensive Cockcroft-Walton at the source voltage (less than or equal to 50 kV) to a single 3'' diameter high voltage gap (less than or equal to 500 kV). This isolation of the gap from the source prevented high voltage breakdown due to gas load… more
Date: January 1, 1979
Creator: Gammel, G. M.; Meier, E. F. & Mobley, R. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Application of the rf quadrupole in linear accelerators for heavy ion fusion

Description: The rf quadrupole (RFQ) linac structure is proposed as an alternative to a system composed of a buncher and independently phased cavities in the low-velocity acceleration section. Beam dynamics simulation studies have demonstrated that with the RFQ (1) high transmission and low beam loss are possible, (2) it is possible to use a low voltage 0.25 MV dc injector and still obtain high output beam currents, (3) the current required from the injector is reduced because of the high transmission of th… more
Date: January 1, 1979
Creator: Wangler, T. P. & Stokes, R. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial performance of the PIGMI prototype. [Pion Generator for Medical Irradiations]

Description: The PIGMI (Pion Generator for Medical Irradiations) program at LASL is an accelerator development program aimed at completing the design of an accelerator suitable for use as a pion generator in a hospital-based radiotherapy program. The major thrust of the program has been the design of a 7 MeV prototype accelerator which emphasizes compactness, economy of construction, and operation and reliability. To achieve these goals the design of the prototype has exploited a number of innovations in pr… more
Date: January 1, 1979
Creator: Stovall, J.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Holifield Heavy Ion Research Facility. Phase II

Description: The Holifield Heavy Ion Research Facility, with the completion of Phase I in late 1979, will include the Oak Ridge Isochronous Cyclotron (ORIC) and associated research areas, the new 25 MV tandem accelerator with new research areas for tandem beams, and modifications to utilize the ORIC as a booster accelerator. The combination of the tandem and ORIC will provide beam energies of 25 MeV/A for light heavy ions and 6 MeV/A up to A = 160. This paper discusses plans for a Phase II expansion of the … more
Date: January 1, 1979
Creator: Ball, J. B.; Hudson, E. D.; Lord, R. S.; Johnson, J. W.; Martin, J. A.; McNeilly, G. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron and ion beam transport to fusion targets

Description: ICF reactors have been proposed which incorporate a gas-filled chamber to reduce x-ray and debris loading of the first wall. Focused beams of either electrons or ions must be transported efficiently for 2-4 m to a centrally located fusion target. Laser-initiated current-carrying plasma discharge channels provide the guiding magnetic field and the charge- and current-neutralizing medium required for beam propagation. Computational studies of plasma channel formation in air using a 1-D MHD model … more
Date: January 1, 1979
Creator: Freeman, J. R.; Baker, L.; Miller, P. A.; Mix, L. P.; Olsen, J. N.; Poukey, J. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Injector Operations at LAMPF

Description: The injector complex at LAMPF consists of three on-line 750-kV injectors which provide simultaneous H/sup +/ and H/sup -/ beams for LAMPF production and an off-line 200-keV injector for ion source and beam diagnostic development studies. The present operation now entails a 500-..mu..A/sub a/ H/sup +/ beam accelerated simultaneously with either a 6-..mu..A/sub a/ unpolarized or 10-nA/sub a/ polarized H/sup -/ beam. In order to obtain the low-beam spill required for the operation of the LAMPF acc… more
Date: January 1, 1979
Creator: Stevens, Ralph R. Jr.; McConnell, John R.; Chamberlin, E. P.; Hamm, R. W. & York, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sensitivity of the PEP beam transport line to perturbations

Description: The sensitivity of a beam-transport line to various perturbations determines the extent to which one can simplify component design and relax tolerances. For the PEP injection lines, effects of various fabrication errors, magnet misalignments, and residual gas scattering were studied. Using the TURTLE ray-tracing program, it is found that magnetic-field errors corresponding to a relative sextupole strength in the dipoles of 0.5% and/or a relative sextupole or octupole strength in the quadrupoles… more
Date: March 1, 1979
Creator: Peterson, J. M. & Brown, K. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RF quadrupole beam dynamics design studies

Description: The radio-frequency quadrupole (RFQ) linear accelerator structure is expected to permit considerable flexibility in achieving linac design objectives at low velocities. Calculational studies show that the RFQ can accept a high-current, low-velocity, dc beam, bunch it with high efficiency, and accelerate it to a velocity suitable for injection into a drift-tube linac. Although it is relatively easy to generate a satisfactory design for an RFQ linac for low beam currents, the space-charge effects… more
Date: January 1, 1979
Creator: Crandall, K. R.; Stokes, R. H. & Wangler, T. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ISX-B neutral beam injector experiment on a prototype beam line

Description: Two PLT-injector-type duoPIGatron sources, modified further by shaping the beam-forming apertures, have been tested and experimented on a prototype beam line similar to the ISX-B neutral beam injection system. The accelerator column modification has resulted in an increase of the beam power transmission efficiency from that of the straight-bore aperture by 50%. Maximum neutral beam powers achieved on a 28-cm-diam target simulating the ISX-B plasma, located 4.1 m downstream from the source, are … more
Date: September 1, 1979
Creator: Kim, J.; Stirling, W. L.; Menon, M. M.; Dagenhart, W. K.; Barber, G. C.; Davis, R. C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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