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Aseev, V. N.

Paper Title Page
WEPMN091 Beam Test of a Grid-less Multi-Harmonic Buncher 2242
  • P. N. Ostroumov, V. N. Aseev, A. Barcikowski, E. Clifft, R. C. Pardo, M. Sengupta, S. I. Sharamentov
    ANL, Argonne, Illinois
  Funding: This work was supported by the U. S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC-02-06CH11357.

The Argonne Tandem Linear Accelerator System (ATLAS) is the first superconducting heavy-ion linac in the world. Currently ATLAS is being upgraded with the Californium Rare Ion Breeder Upgrade (CARIBU). The latter is a funded project to expand the range of short-lived, neutron-rich rare isotope beams available for nuclear physics research at ATLAS. To avoid beam losses associated with the existing gridded multi-harmonic buncher, we have developed and built a grid-less four-harmonic buncher with fundamental frequency of 12.125 MHz. In this paper, we are going to report the ATLAS beam performance with the new buncher.

THPAN100 Parallelization of TRACK for Large Scale Beam Dynamic Simulations in Linear Accelerator 3459
  • J. Xu, V. N. Aseev, B. Mustapha, P. N. Ostroumov
    ANL, Argonne, Illinois
  Funding: This work was supported by the U. S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC-02-06CH11357.

Large scale beam dynamics simulations are important to support the design and operations of an accelerator. From the beginning, the beam dynamics code TRACK was developed to make it useful in the three stages of a hadron (proton and heavy-ion) linac project, namely the design, commissioning and operation of the machine. In order to combine the unique features of TRACK with large scale and fast parallel computing we have recently developed a parallel version of the code*. We have successfully benchmarked the parallel TRACK on different platforms: BG/L and Jazz at ANL, Iceberg at ARSC, Lemieux at PSC and Seaborg at NERSC. We have performed large scale RFQ and end-to-end simulations of the FNAL proton driver where particles were simulated. The actual parallel version has the potential of simulating particles on 10 racks with 20,480 processors of BG/L at ANL, which will be available soon. After a brief description of the parallel TRACK, we'll present results from highlight applications.

* "Parallelization of a Beam Dynamics Code and First large Scale RFQ Simulations", J. Xu, B. Mustapha, V. N. Aseev and P. N. Ostroumov, accepted for publication in PRST-AB.

THPAS051 The RIAPMTQ/IMPACT Beam-Dynamics Simulation Package 3606
  • T. P. Wangler, J. H. Billen, R. W. Garnett
    LANL, Los Alamos, New Mexico
  • V. N. Aseev, B. Mustapha, P. N. Ostroumov
    ANL, Argonne, Illinois
  • K. R. Crandall
    TechSource, Santa Fe, New Mexico
  • M. Doleans, D. Gorelov, X. Wu, R. C. York, Q. Zhao
    NSCL, East Lansing, Michigan
  • J. Qiang, R. D. Ryne
    LBNL, Berkeley, California
  Funding: This work is supported by the U. S. Department of Energy, DOE contract number:W-7405-ENG-36

RIAPMTQ/IMPACT is a pair of linked beam-dynamics simulation codes that have been developed for end-to-end computer simulations of multiple-charge state heavy-ion linacs for future exotic-beam facilities. The simulations can extend from the low-energy beam transport after the ECR source to the end of the linac. The work has been performed by a collaboration including LANL, LBNL, ANL, MSU, and TechSource. The code RIAPMTQ simulates the linac front end including the LEBT, RFQ, and MEBT, and the code IMPACT simulates the main superconducting linac. The codes have been benchmarked for rms beam properties against previously existing codes at ANL and MSU. The codes allow high-statistics runs on parallel supercomputing platforms, such as NERSC at LBNL, as well as runs on desktop PC computers for low-statistics design work. We will show results from 10-million-particle simulations of RIA designs by ANL and MSU, carried out at the NERSC facility. These simulation codes will allow evaluations of candidate designs with respect to beam-dynamics performance including beam losses.