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in subjects: "430100 -- Particle Accelerators-- Design, Development, & Operation"

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Prospects for physics at e/sup +/e/sup -/ linear colliders

The present thinking on high-energy e/sup /plus//e/sup /minus// linear colliders is reviewed, stressing those points that have consequences for detector design and physics analyses. Detector requirements are discussed. Experimental aspects of the physics that can be done at these colliders are discussed: first the general physics environment, then a standard process, W/sup /plus// W/sup /minus// detection, and finally four examples of the discovery potential of these colliders /emdash/ heavy qu… more

Date: March 1, 1988

Creator: Feldman, G. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Generation of coherent soft x-rays using a single-pass free-electron laser amplifier

We consider a single-pass free-electron laser (FEL) amplifier, driven by an rf-linac followed by a damping ring for reduced emittance, for use in generating coherent light in the soft x-ray region. The dependence of the optical gain on electron-beam quality, studied with the three-dimensional FEL simulation code FELEX, is given and related to the expected power of self-amplified spontaneous emission. We discuss issues for the damping ring designed to achieve the required electron beam quality. … more

Date: January 1, 1987

Creator: Wang, T. F.; Goldstein, J. C.; Newmam, B. E. & McVey, B. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CW 100MW microwave power transfer in space

A proposal is made for high-power microwave transfer in space. The concept consists in a microwave power station integrating a multistage microwave free-electron laser and asymmetric dual-reflector system. Its use in space is discussed. 9 refs., 2 figs., 1 tab.

Date: January 1, 1991

Creator: Takayama, K. (Houston Univ., TX (United States). Inst. for Beam Particle Dynamics National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan) Texas Accelerator Center, The Woodlands, TX (United States)); Hiramatsu, S. (National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan)) & Shiho, M. (Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Review of induction LINACS

There has been a recent upsurge of activity in the field of induction linacs, with several new machines becoming operational and others in the design stages. The performance levels of electron machines have reached 10's of kiloamps of current and will soon reach 10's of MeV's of energy. Acceleration of ion current has been demonstrated, and the study of a 10 GeV heavy ion induction linac for ICF continues. The operating principles of induction linacs are reviewed with the emphasis on design cho… more

Date: October 1, 1981

Creator: Faltens, A. & Keefe, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The laser switched linac and development of a high brilliance electron source

This task originated in 1987 to explore the possibility of accelerating short bursts of electrons by pulsed power. The principal effort of our group was to demonstrate that electrons can be accelerated by picosecond-long electrical pulses which are compressed in a radial transmission line. This goal has new been achieved and our results are presented in this paper. We have achieved a gradient of 45 MV/m across a 250 {mu}m accelerating gap and have accelerated 10{sup 6} electrons in a 1 ps long … more

Date: September 1, 1991

Creator: Melissinos, A.C.; Bamber, C.; Blalock, T.; Fry, A. & Wilson, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Actinide cross section program at ORELA

The actinide cross section program at ORELA, the Oak Ridge Electron Linear Accelerator, is aimed at obtaining accurate neutron cross sections (primarily fission, capture, and total) for actinide nuclides which occur in fission reactors. Such cross sections, measured as a function of neutron energy over as wide a range of energies as feasible, comprise a data base that permits calculated predictions of the formation and removal of these nuclides in reactors. The present program is funded by the … more

Date: January 1, 1980

Creator: Dabbs, J. W. T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Heavy ion drivers for inertial confinement fusion

The advantages of heavy ion beams as a way of delivering the needed energy and power to an inertial fusion target are surveyed. The existing broad technology base of particle accelerators provides an important foundation for designing, costing, and evaluating proposed systems. The sequence of steps needed for the verification of the heavy ion approach is described; recent research results are even more encouraging than had been assumed hitherto.

Date: December 1, 1983

Creator: Keefe, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Critical current studies on fine filamentary NbTi accelerator wires

The magnets for the Superconductig Super Collider, a high energy proton colliding beam accelerator, require a superconductor with very high current density (>2400 A/mm/sup 2/ at 5 T) and very small filaments (approx. 2..mu..m in diameter). Previous work has shown that by controlling the formation of Cu/sub 4/Ti compound particles on the filament surfaces it is possible to make fine filamentary NbTi wire with high critical current density. The performance of multi-filamentary wire is characteriz… more

Date: January 1, 1985

Creator: Garber, M.; Suenaga, M.; Sampson, W.B. & Sabatini, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Heavy ion fusion accelerator research (HIFAR) year-end report, April 1, 1991--September 30, 1991

This report discusses the following topics: ion source for the final focusing scaling experiment; reference ILSE physics design; injector and ion source development; the injector matching section; beam merging in ILSE; short quadrupole magnet design; ILSE concept induction cell studies; fast split-harp emittance measurements using a multichannel waveform analyzer; and HIFAR staff roster.

Date: September 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Preliminary PBFA II design

The upgrade of Sandia National Laboratories particle beam fusion accelerator, PBFA I, to PBFA II presents several interesting and challenging pulsed power design problems. PBFA II requires increasing the PBFA I output parameters from 2 MV, 30 TW, 1 MJ to 4 MV, 100 TW, 3.5 MJ with the constraint of using much of the same PBFA I hardware. The increased PBFA II output will be obtained by doubling the number of modules (from 36 to 72), increasing the primary energy storage (from 4 MJ to 15 MJ), low… more

Date: January 1, 1980

Creator: Johnson, D. L.; VanDevender, J. P. & Martin, T. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Plasma wave accelerator. II

It was shown that the insertion of a cross magnetic field prevents the particles from getting out of phase with the electric field of the plasma wave in the beat wave accelerator scheme. Thus, using a CO/sub 2/ laser, n/sub c//n/sub e/ = (..omega../sub 0//..omega../sub p/)/sup 2/ approx. 35, and a 300 kG magnetic field, electrons can be (in principle) accelerated to 100 GeV in 2 meters. For comparison without the magnetic field, the same energies may be obtained in a n/sub c//n/sub e/ approx. 1… more

Date: January 1, 1982

Creator: Mori, W.; Joshi, C. & Dawson, J.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Plans for polarized beams at the SLC

Precision tests of the electroweak interactions will soon be possible at the SLC and LEP. The SLC will be capable of providing longitudinal polarization of one incoming beam, the electrons, for such tests. Plans at the SLC to provide and monitor these beams are described, and some physics objectives are discussed. 5 refs., 10 figs.

Date: July 1, 1985

Creator: Prescott, Charles Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Prospects of the surfatron laser plasma accelerator

The surfatron concept is proposed as a possible solution to the problem of staging in the laser-plasma beat wave accelerator scheme. Prospects of a 100 GeV particle accelerator based on the surfatron concept are explored. Finite angle optical mixing appears to be a promising solution for drastically reducing the width of the plane wave, thereby, making the required laser power and the device size realizable for a proof-of-principle experiment. Our conclusions are based mainly on analytical theo… more

Date: January 1, 1983

Creator: Katsouleas, T.; Joshi, C.; Mori, W. & Dawson, J.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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New half-voltage and double phase operation of the Hermes III linear induction accelerator

The standard operating mode produces bremsstrahlung with an endpoint energy of about 18 MeV. This paper describes a new mode with a 8.5 MeV endpoint energy and the same standard mode pulse characteristics achieved by operating only half of the accelerator at full charge with the advantage of minimal setup time. An extension of the new half-voltage mode is to use the other half of the accelerator for delivering a second pulse at a later time with the same technique. The double pulse mode is idea… more

Date: January 1, 1991

Creator: Mikkelson, K.A.; Westfall, R.L.; Harper-Slaboszewicz, V.J. (Sandia National Labs., Albuquerque, NM (United States)) & Neely, S.M. (K-Tech Corp., Albuquerque, NM (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Recirculating induction accelerator as a low-cost driver for heavy ion fusion

As a fusion driver, a heavy ion accelerator offers the advantages of efficient target coupling, high reliability, and long stand-off focusing. While the projected cost of conventional heavy ion fusion (HIF) drivers based on multiple beam induction linacs are quite competitive with other inertial driver options, a driver solution which reduces the cost by a factor of two or more will make the case for HIF truly compelling. The recirculating induction accelerator has the potential of large cost r… more

Date: September 1, 1991

Creator: Barnard, J. J.; Newton, M. A.; Reginato, L. L.; Sharp, W. M.; Shay, H. D. & Yu, S. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Pulsed power technology for particle beam fusion

A brief review of the PBFA I is given and some of its advantages for inertial confinement fusion are described. (MOW)

Date: January 1, 1980

Creator: VanDevender, J. P.; Martin, T. H.; Johnson, D. L.; Neau, E. L.; Crow, J. T. & Yonas, G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Heavy Ion Fusion Accelerator Research (HIFAR) half-year report, October 1, 1988--March 31, 1989

The basic objective of the Heavy Ion Fusion Accelerator Research (HIFAR) program is to assess the suitability of heavy ion accelerators as igniters for Inertial Confinement Fusion (ICF). A specific accelerator technology, the induction linac, has been studied at the Lawrence Berkeley Laboratory and has reached the point at which its viability for ICF applications can be assessed over the next few years. The HIFAR program addresses the generation of high-power, high-brightness beams of heavy ion… more

Date: June 1, 1989

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Optical design and performance of an XUV FEL (free-electron laser) oscillator

A study of numerical simulation of the performance of a multifacet metal mirror ring resonator FEL is presented for several XUV wavelengths. Laser performance in the presence of mirror aberrations and thermal distortion is calculated for two different output coupling methods, a scraper mirror and a hole. 11 refs., 1 fig.

Date: January 1, 1989

Creator: Goldstein, J.C.; McVey, B.D. & Newnam, B.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Proposed partitioning and transmutation of long-lived nuclear wastes

A means of transmuting key long-lived nuclear wastes, primarily the minor actinides (Np, Am, Cm) and iodine, using a hybrid proton accelerator and sub-critical lattice, is proposed. By partitioning light water reactor (LWR) spent fuel and by transmuting key elements, such as the plutonium, the minor actinides, and a few of the long-lived fission products, some of the most significant challenges in building a waste repository can be substantially reduced. The proposed machine would transmute the… more

Date: January 1, 1991

Creator: Van Tuyle, G.J. (Brookhaven National Lab., Upton, NY (United States)) & Rawlins, J.A. (Westinghouse Hanford Co., Richland, WA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Inertial confinement fusion systems using heavy ion accelerators as drivers

Heavy ion accelerators are the most recent entrants in the effort to identify a practical driver for inertial confinement fusion. They are of interest because of the expected efficient coupling of ion kinetic energy to the thermal energy needed to implode the pellet and because of the good electrical efficiency of high intensity particle accelerators. The beam intensities required, while formidable, lie within the range that can be studied by extensions of the theories and the technology of mod… more

Date: March 1, 1980

Creator: Herrmannsfeldt, W. B.; Godlove, T. F. & Keefe, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Linear colliders - prospects 1985

We discuss the scaling laws of linear colliders and their consequences for accelerator design. We then report on the SLAC Linear Collider project and comment on experience gained on that project and its application to future colliders. 9 refs., 2 figs.

Date: June 1, 1985

Creator: Rees, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Induction linac drivers for commercial heavy-ion beam fusion

This paper discusses induction linac drivers necessary to accelerate heavy ions at inertial fusion targets. Topics discussed are: driver configurations, the current-amplifying induction linac, high current beam behavior and emittance growth, new considerations for driver design, the heavy ion fusion systems study, and future studies. 13 refs., 6 figs., 1 tab. (LSP)

Date: November 1, 1987

Creator: Keefe, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Characterization of an accelerator neutron source based on the Be(d,n) reaction

Small accelerator neutron sources offer considerable potential for applied neutron radiography applications. Among the desirable features are relatively low costs, limited operating hazards, opportunities for tailoring primary neutron spectra, compactness and portability, and modest licensing requirements (compared to fission reactors). However, exploitation of this potential has been somewhat limited, in part, by incomplete knowledge of the primary-neutron yields and energy spectra from the fa… more

Date: January 1, 1992

Creator: Meadows, J. W. & Smith, D. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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A microwiggler Free-Electron Laser at the Brookhaven Accelerator Test Facility

We report the design and status of an FEL experiment at the Brookhaven National Laboratory Accelerator Test Facility. A 50 MeV high brightness electron beam will be utilized for an oscillator experiment in the visible wavelength region. The microwiggler to be used is a superferric planar undulator with a 0.88 cm period, 60 cm length and K = 0.35. The optical cavity is a 368 cm long stable resonator with broadband dielectric coated mirrors. 8 refs., 2 figs., 4 tabs.

Date: September 26, 1989

Creator: Batchelor, K.; Ben-Zvi, Ilan; Fernow, R.; Gallardo, J.; Kirk, H.; Pellegrini, C. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department