skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Square PulseLTD based injector for ARIA and / orDARHT I.


Abstract not provided.

; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the LIA Radiographic Source for ECSE Workshop held April 22-24, 2015 in Los Alamos, New Mexoco.
Country of Publication:
United States

Citation Formats

Mazarakis, Michael G., Cuneo, Michael E., Johnston, Mark D., Kiefer, Mark L., Leckbee, Joshua J., and Webb, Timothy Jay. Square PulseLTD based injector for ARIA and / orDARHT I.. United States: N. p., 2015. Web.
Mazarakis, Michael G., Cuneo, Michael E., Johnston, Mark D., Kiefer, Mark L., Leckbee, Joshua J., & Webb, Timothy Jay. Square PulseLTD based injector for ARIA and / orDARHT I.. United States.
Mazarakis, Michael G., Cuneo, Michael E., Johnston, Mark D., Kiefer, Mark L., Leckbee, Joshua J., and Webb, Timothy Jay. 2015. "Square PulseLTD based injector for ARIA and / orDARHT I.". United States. doi:.
title = {Square PulseLTD based injector for ARIA and / orDARHT I.},
author = {Mazarakis, Michael G. and Cuneo, Michael E. and Johnston, Mark D. and Kiefer, Mark L. and Leckbee, Joshua J. and Webb, Timothy Jay},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2015,
month = 4

Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • Theoretical investigation of the interaction of electrons with an electromagnetic wave in a microwave amplifier indicates that nearly 50% of the electrons are in fact accelerated in the amplification process. These fast electrons are phase correlated at the output of an amplifier and they can be further accelerated. For a beam pulse of 100 [ital nsec] and an [ital X]-band amplifier, a train of about 1000 bunches can be achieved. Several schemes were considered. Here we present a uniform amplifier, a drift tube (were the slow electrons are dumped) and an accelerator section. With an initial current of 1200 [italmore » A], and an input power of 20 [ital kW] we calculated electrons with energies of 6 [ital MeV] in buckets of 20[degree] corresponding to about 1[times]10[sup 10] particles per bunch and an instantaneous current of more than 270 [ital A]; the total system length was 1.1 [ital m].« less
  • A 500 keV, 10 MW neutral beam injector is to be constructed in JT-60 Upgrade for the experiments of current drive and heating of heat density core plasmas. This is the first neutral beam injector in the world using negative ions as the primary ions. In the design, D[sup [minus]] ion beams of 44 A, 500 keV are produced by two ion sources (22 A/each ion source) and neutralized in a long gas neutralizer. The total system efficiency is about 40%. The ion source is a cesium-seeded multicusp volume source having a three stage electrostatic accelerator. To reduce the strippingmore » loss of D[sup [minus]] ions in the accelerator, the ion source should be operated at a low pressure of 0.3 Pa with a current density of 13 mA/cm[sup 2]. The first test of the full-size negative ion source is scheduled from middle of 1993.« less
  • Energy recovery experiments have been conducted for the first time with a negative ion based neutral beam injector. A new type of energy recovery system was utilized, which: (i) separates electrostatically the neutrals and charged components of the beam at the exit of the neutralizer; (ii) decelerates the residual unneutralized negative ions; (iii) prevents secondary emission of electrons from the negative ion collector by means of electrostatic trapping. With 102 keV, 1.2 A D[sup [minus]] beams, the residual negative ions have been decelerated with high efficiency down to 8 keV. By taking into account the power consumption of the electrostaticmore » deflector, the recovery efficiency of the residual negative ion beam power was as good as 81%, at a background gas operating pressure around 10[sup [minus]3] Pa.« less
  • Conceptual design of a bright electron injector for the 1 GeV high gradient test experiment, envisaged by the LLNL-SLAC-LBL collaboration on the Relativistic Klystron is presented. The design utilizes a high-brightness laser-driven rf photocathode electron gun, similar to the pioneering LANL early studies in concept (different parametrically however), together with achromatic magnetic bunching and transport systems and diagnostics. The design is performed with attention to possible use in an FEL as well. A simple but realistic analytic model including longitudinal and transverse space-charge and rf effects and extensive computer simulation form the basis of the parametric choice for the source.more » These parameters are used as guides for the design of the picosecond laser system and magnetic bunching section. 4 refs., 5 figs., 2 tabs.« less
  • A Radio Frequency Quadrupole (RFQ)-based low energy accelerator integrates well with an electron beam ion source (EBIS) as the front end of a heavy ion synchrotron. A design example for an RFQ-based RHIC injector front-end is given which uses an EBIS. The characteristics of heavy ion RFQ's are outlined and several specific examples are given of operating machines.