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A regulated magnetron pulser

Description: This paper describes and analysis of a 4.5-kV, 500-mA, regulated current pulser used to drive a Hitachi ZM130 magnetron in a particle-accelerator injector. In this application, precise beam from the injector. A high-voltage triode vacuum tube with active feedback is used to control the magnetron current. Current regulation and accuracy is better than 1%. The pulse width may be varied from as little as 5 {mu}m to cw by varying the width of a gate pulse. The current level can be programmed betwee… more
Date: September 1, 1997
Creator: Rose, C. R.
Partner: UNT Libraries Government Documents Department
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Description and operation of the LEDA beam-position/intensity measurement module

Description: This paper describes the specification, design and preliminary operation of the beam-position/intensity measurement module being built for the Low Energy Demonstration Accelerator (LEDA) and Accelerator Production of Tritium (APT) projects at Los Alamos National Laboratory. The module, based on the VXI footprint, is divided into three sections: first, the analog front-end which consists of logarithmic amplifiers, anti-alias filters, and digitizers; second, the digital-to-analog section for moni… more
Date: October 1, 1997
Creator: Rose, C.R. & Stettler, M.W.
Partner: UNT Libraries Government Documents Department
open access

A 200-A, 500-Hz, triangle current-wave modulator and magnet used for particle beam rastering

Description: This paper describes a simple 2D beam-rastering system to uniformly spread a 100-mA 6.7-MeV cw proton beam over a 50-cm by 50-cm beam stop. The basic circuit uses a 20-mF capacitor bank, a IGBT (insulated gate bipolar transistor) full-wave inverter, and a 1-mH ferrite dipole magnet to produce a {+-} 500-Gauss peak triangular-waveform deflection field at 500 Hz. A dc input voltage of 200 volts at 2.6 amps (520 watts) produces a 160-ampere peak-to-peak triangular current waveform in the ferrite m… more
Date: October 1, 1997
Creator: Rose, C. R. & Shafer, R. E.
Partner: UNT Libraries Government Documents Department
open access

The LEDA beam-position measurement system

Description: This paper describes the beam-position measurement system being developed for the Low Energy Demonstration Accelerator (LEDA) and the Accelerator Production of Tritium (APT) projects at Los Alamos National Laboratory. The system consists of a beam-position monitor (BPM) probe, cabling, down-converter module, position/intensity module, on-line error-correction system, and the necessary control system interfaces. The modules are built on the VXI-interface standard and are capable of duplex data t… more
Date: August 1, 1997
Creator: Rose, C. R.; Gilpatrick, J. D. & Stettler, M. W.
Partner: UNT Libraries Government Documents Department
open access

Initial test results of the Los Alamos proton-storage-ring bump-magnet system

Description: An upgrade program for increasing the stored beam current in the LANSCE Proton Storage is presently under way. Part of the upgrade effort has been to design, specify, and add four bump-magnet/modulator systems to the ring. This paper describes the initial test results of the first bump-magnet/modulator system. The paper begins with an overview of the pulsed-power system including important specifications of the modulator, magnet, cabling, and control system. In the main portion of the paper, wa… more
Date: September 1, 1997
Creator: Rose, C. R.; Barlow, D. B. & Redd, D. B.
Partner: UNT Libraries Government Documents Department
open access

Performance and test results of a regulated magnetron pulser

Description: This paper describes the test results and performance of a 5.0-kV, 750-mA, regulated current pulser used to drive an Hitachi model 2M130 2,425-MHz magnetron. The magnetron is used to modulate the plasma in a particle accelerator injector. In this application, precise and stable rf power is crucial to extract a stable and accurate particle beam. A 10-kV high-voltage triode vacuum tube with active feedback is used to control the magnetron current and output rf power. The pulse width may be varied… more
Date: December 31, 1998
Creator: Rose, C. R. & Warren, D.S.
Partner: UNT Libraries Government Documents Department
open access

Design and operation of a button-probe, beam-position measurements

Description: Beam position measurement systems have been installed on the Advanced Free Electron Laser (AFEL) facility at Los Alamos National Laboratory. The position measurement uses a capacitive- or button-style probe that differentiates the beam-bunch charge distribution induced on each of the four probe lobes. These induced signals are fed to amplitude-to-phase processing electronics that provide output signals proportional to the arc tangent of the probe's opposite-lobe, signal-voltage ratios. An assoc… more
Date: January 1, 1993
Creator: Gilpatrick, J. D.; Power, J. F.; Meyer, R. E. & Rose, C. R.
Partner: UNT Libraries Government Documents Department
open access

Design and operation of a button-probe, beam-position measurements

Description: Beam position measurement systems have been installed on the Advanced Free Electron Laser (AFEL) facility at Los Alamos National Laboratory. The position measurement uses a capacitive- or button-style probe that differentiates the beam-bunch charge distribution induced on each of the four probe lobes. These induced signals are fed to amplitude-to-phase processing electronics that provide output signals proportional to the arc tangent of the probe`s opposite-lobe, signal-voltage ratios. An assoc… more
Date: June 1, 1993
Creator: Gilpatrick, J. D.; Power, J. F.; Meyer, R. E. & Rose, C. R.
Partner: UNT Libraries Government Documents Department
open access

Noninterceptive beam energy measurements in line D of the Los Alamos Meson Physics Facility

Description: Several members of the Accelerator and Operations Technology (AOT) division beam-diagnostics team performed time-of-flight (TOF) beam-energy measurements in line D of the Los Alamos Meson Physics Facility (LAMPF) using developmental beam time. These measurements provided information for a final design of an on-line beam energy measurement. The following paper discusses these measurements and how they apply to the final beam energy measurement design.
Date: December 31, 1995
Creator: Gilpatrick, J. D.; Carter, H.; Plum, M.; Power, J. F.; Rose, C. R. & Shurter, R. B.
Partner: UNT Libraries Government Documents Department
open access

Magnet design concepts for the 100-MeV isotope production facility

Description: This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The North Port Target Facility proposal includes a 100-MeV beam line to be built at the LANSCE accelerator. In developing cost and schedule estimates for this proposal, the greatest uncertainties are associated with the kicker magnet that is needed to divert portions of the beam into the new beam line. This magnet must fit into a rigidly defined space… more
Date: August 1, 1997
Creator: Wadlinger, E. A.; Merrill, F. E.; Power, J. F.; Rose, C. R. & Walstrom, P. L.
Partner: UNT Libraries Government Documents Department
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