1,745 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Accelerator Facilities"

open access

1. 2-GeV damping-ring complex for the Stanford Linear Collider

The choice of parameters, the design, a 2-1/2 year consruction program and the early operation of a high field, high tune research and development damping ring complex for one of the two linear collider beams are described.

Date: July 1983

Creator: Fischer, G. E.; Davies-White, W.; Fieguth, T. & Wiedemann, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A 1- to 5-MW, RCS-based, short-pulse spallation neutron source

Two accelerator configurations, the linac/compressor ring scheme and the linac/RCS scheme, are commonly used to provide the proton beam power for a short-pulse spallation neutron source. In one configuration, a full-power linac provides the beam power and a compressor ring shortens the pulse length from 1-ms down to 1 {micro}s. In the other, rapid cycling synchrotrons (RCSs) provide the beam power and also shorten the pulse length. A feasibility study of a staged approach to a 5-MW proton sourc… more

Date: June 1997

Creator: Cho, Y.; Chae, Y.-C. & Crosbie, E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

2. 5 MeV neutron source for fission cross section measurement

A 2.5 MeV neutron source has been established on the beamline of a 100 kV, 0.5 ma ion accelerator. The ion accelerator provides a 100 kV deuteron beam of about 200 ..mu..a into a 3 mm beam spot at the target position. The neutron source is produced by the D(d,n)/sup 3/He reaction with a yield of about 10/sup 7/ n/sec. The time-correlated associated particle method (TCAP) is utilized for the neutron fluence determination and for neutron background elimination. The /sup 3/He associated particles … more

Date: January 1, 1988

Creator: Duvall, K. C.; Wasson, O. A. & Ma, Honchang

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

4. pi. physics with the plastic ball

4 ..pi.. data taken with the Plastic Ball show that cluster production in relativistic nuclear collisions depends on both the size of the participant volume and the finite size of the cluster. The measurement of the degree of thermalization and the search for collective flow will permit the study of the applicability of macroscopic concepts such as temperature and density.

Date: October 1, 1982

Creator: Gutbrod, H. H.; Loehner, H.; Poskanzer, A. M.; Renner, T.; Riedesel, H.; Ritter, H. G. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

7-GeV advanced photon source beamline initiative: Conceptual design report

The DOE is building a new generation 6-7 GeV Synchrotron Radiation Source known as the Advanced Photon Source (APS) at Argonne National Laboratory. This facility, to be completed in FY 1996, can provide 70 x-ray sources of unprecedented brightness to meet the research needs of virtually all scientific disciplines and numerous technologies. The technological research capability of the APS in the areas of energy, communications and health will enable a new partnership between the DOE and US indus… more

Date: May 1, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

7-GeV Advanced Photon Source Conceptual Design Report

During the past decade, synchrotron radiation emitted by circulating electron beams has come into wide use as a powerful, versatile source of x-rays for probing the structure of matter and for studying various physical processes. Several synchrotron radiation facilities with different designs and characteristics are now in regular operation throughout the world, with recent additions in this country being the 0.8-GeV and 2.5-GeV rings of NSLS at Brookhaven National Laboratory. However, none of … more

Date: April 1, 1987

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

7-GeV Advanced Photon Source Instrumentation Initiative conceptual design report

In this APS Instrumentation Initiative, 2.5-m-long and 5-m-long insertion-device x-ray sources will be built on 9 straight sections of the APS storage ring, and an additional 9 bending-magnet sources will also be put in use. The front ends for these 18 x-ray sources will be built to contain and safeguard access to these bright x-ray beams. In addition, funds will be provided to build state-of-the-art insertion-device beamlines to meet scientific and technological research demands well into the … more

Date: December 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

7-GeV Advanced Photon Source Instrumentation Initiative conceptual design report

Date: December 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

20-TeV colliding-beam facilities

In March, a workshop was held at Cornell University on the accelerator. The conclusion of this workshop was that a 20 TeV on 20 TeV proton-proton collider is technically feasable, that construction could begin after 2.5 to 4 years of research and development, and the cost would be 1.3 to 2 billion dollars. To put this machine into perspective one must consider the existing facilities listed in table I. There are about 23 high energy physics laboratories in the world that are being operated or c… more

Date: September 15, 1983

Creator: Huson, F.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

25--30 T water cooled pulse magnet concept for neutron scattering experiment

The Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory is in need of a high field, split-pair, pulse magnet that would provide a 25--30 T field in a 25 mm bore and 10 mm split gap for 2--4 ms at a repetition rate of 2 Hz. Single stack Bitter magnets of this type providing less than 20 T vertical field in the split gap have been constructed before. To produce higher fields, there is a need to use a multiple layer coil with internal reinforcement. The magnet should withsta… more

Date: December 31, 1997

Creator: Eyssa, Y. M.; Walsh, R. P.; Miller, J. R.; Pernambuco-Wise, P.; Bird, M. D.; Schneider-Muntau, H. J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

25 MV tandem accelerator at Oak Ridge

A new heavy-ion accelerator facility is under construction at the Oak Ridge National Laboratory. A brief description of the scope and status of this project is presented with emphasis on the first operational experience with the 25 MV tandem accelerator.

Date: January 1, 1980

Creator: Jones, C. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

30-kV Proton Injector for PIGMI

A 30-kV proton injector designed for matching a 31-mA proton beam into the radio-frequency quadrupole (RFQ) section of the PIGMI accelerator has been constructed and tested. This injector uses a small efficient duoplasmatron ion source and a single-gap extraction system for creating a convergent ion beam, and a three-element unipotential einzel lens for focusing the ion beam into the RFQ. A description of this prototype injector is presented, along with the experimental data obtained during the… more

Date: January 1, 1981

Creator: Hamm, R. W.; Mueller, D. W. & Sturgess, R. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

35 Years of Electron Scattering

A review of the current knowledge of nuclear and nucleon structure gained from electron beam physics is given. Also, the reasons for development of new accelerator facilities (in particular, CEBAF) are discussed.

Date: October 1, 1986

Creator: Walecka, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A 100-kV, 2-kA, 2.5-{micro}S Pulser for Developing and Calibrating Long-Pulse Diagnostics

The development of voltage and current probes for measuring an electron beam's current and position associated with several microsecond-long pulses from advanced Linear Induction Accelerators requires a precision pulser that can deliver both high voltages and high currents to a diagnostics Test Line. Seven-stage, type-E PFNs have been utilized in both a transformer and 4-stage Marx (plus/minus) configuration. The resulting 50-ohm pulser delivers to the Test Line a repeatable 100 kV, ca. 2 {micr… more

Date: June 27, 1999

Creator: Carlson, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

100 MW klystron development at SLAC

A klystron designed to operate at 11.4 GHz and 440 kV is presently SLAC's strongest rf power source candidate for the Next Linear Collider. It is expected to provide 100 MW of rf power with a pulse width of 1 microsecond. Many of the conventional tube technologies are being pushed to their limits. High electron beam power densities, rf electric gradients in cavity gaps and stresses on the ceramic rf output windows are among the most severe problems to be dealt with. This paper describes progres… more

Date: May 1, 1991

Creator: Vlieks, A. E.; Callin, R. S.; Caryotakis, G.; Fant, K. S.; Fowkes, W. R.; Lee, T. G. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

150-METER TIME-OF-FLIGHT FACILITY AT ORELA.

No Description Available.

Date: January 1, 1972

Creator: Silver, E. G.; Ingle, R. W.; de Saussure, G.; Perez, R. B.; Weaver, H. & Robson, R. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

600 kV modulator design for the SLAC Next Linear Collider Test Accelerator

Preliminary design for the SLAC Next Linear Collider Test Accelerator (NLCTA) requires a pulse power source to produce a 600 kV, 600 A, 1.4 {mu}s, 0.1% flat top pulse with rise and fall times of approximately 100 ns to power an X-Band klystron with a microperveance of 1.25 at {approx} 100 MW peak RF power. The design goals for the modulator, including those previously listed, are peak modulator pulse power of 340 MW operating at 120 Hz. A three-stage darlington pulse-forming network, which prod… more

Date: July 1, 1992

Creator: Harris, K.; de Lamare, J.; Nesterov, V. & Cassel, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

650 mm long liquid hydrogen target for use in a high intensity electron beam

This paper describes a 650 mm long liquid hydrogen targetr constructed for use in the high intensity electron beam at the Stanford Linear Accelerator Center (SLAC). The main design problem was to construct a target that would permit the heat deposited by the electron beam to be removed rapidly without boiling the hydrogen so as to maintain constant target density for optimum data taking. Design requirements, cosntruction details and operating experience are discussed.

Date: February 1, 1984

Creator: Mark, J.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

An 800-MeV proton beam spill calculation

Using LAHET, the Los Alamos High-Energy Transport code, the authors calculated the radiation hazard from an 800-MeV proton beam spill at the bending magnet. Neutron doses were calculated at an area above the 84.0-cm-thick concrete roof, where there existed a gap with only 30.48-cm concrete shielding. The authors also studied the effect of the gap and proposed a corrective action.

Date: December 31, 1996

Creator: Hsu, H. H.; Duran, M. A. & Walker, L. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

An 800-MeV proton radiography facility for dynamic experiments

The capability has been successfully developed at the Los Alamos Nuclear Science Center (LANSCE) to utilize a spatially and temporally prepared 800-MeV proton beam to produce proton radiographs. A series of proton bursts are transmitted through a dynamically varying object and transported, via a unique magnetic lens system, to an image plane. The magnetic lens system permits correcting for the effects of multiple coulomb scattering which would otherwise completely blur the spatially transmitted… more

Date: December 1, 1998

Creator: King, N.S.P.; Adams, K. & Ables, E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

3081/E processor and its on-line use

The 3081/E is a second generation emulator of a mainframe IBM. One of it's applications will be to form part of the data acquisition system of the upgraded Mark II detector for data taking at the SLAC linear collider. Since the processor does not have direct connections to I/O devices a FASTBUS interface will be provided to allow communication with both SLAC Scanner Processors (which are responsible for the accumulation of data at a crate level) and the experiment's VAX 8600 mainframe. The 3081… more

Date: May 1, 1985

Creator: Rankin, P.; Bricaud, B.; Gravina, M.; Kunz, P. F.; Oxoby, G.; Trang, Q. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

3D numerical thermal stress analysis of the high power target for the SLC Positron Source

The volumetrically nonuniform power deposition of the incident 33 GeV electron beam in the SLC Positron Source Target is hypothesized to be the most likely cause target failure. The resultant pulsed temperature distributions are known to generate complicated stress fields with no known closed-form analytical solution. 3D finite element analyses of these temperature distributions and associated thermal stress fields in the new High Power Target are described here. Operational guidelines based on… more

Date: May 1, 1991

Creator: Reuter, E.M. & Hodgson, J.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

4D Emittance Measurements Using Multiple Wire and Waist Scan Methods in the ATF Extraction Line

Emittance measurements performed in the diagnostic section of the Accelerator Test Facility (ATF) extraction line since 1998 led to vertical emittances three times larger than the expected ones, with a strong dependence on intensity. An experimental program is pursued to investigate potential sources of emittance growth and find possible remedies. This requires efficient and reliable emittance measurement techniques. In the past, several phase-space reconstruction methods developed at SLAC and … more

Date: November 2, 2011

Creator: Rimbault, C.; Bambade, P.; Brossard, J.; Alabau, M.; Kuroda, S.; Scarfe, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Aberration analysis calculations for synchrotron radiation beamline design

The application of ray deviation calculations based on aberration coefficients for a single optical surface for the design of beamline optical systems is reviewed. A systematic development is presented which allows insight into which aberration may be causing the rays to deviate from perfect focus. A new development allowing analytical calculation of line shape is presented.

Date: September 1, 1997

Creator: McKinney, W.R.; Howells, M. & Padmore, H.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department