Speaker
Description
PROPAGATION OF ELECTRON BEAMS IN GAS CELLS
B. Cassany, D. Hebert, J. Gardelle, P. Modin, N. Szalek,
CEA/CESTA, CS 60001, 33116 Le Barp, France
K. Bell, C. H. Moore, B. Medina, M. Bettencourt
Sandia National Laboratories
Albuquerque, NM 87185 USA
In this work, we present the first results of joint Sandia National Laboratories (SNL) and CESTA experiments where electron beams are produced by field-emission diodes and propagate in Argon-filled gas cells. We are presently using the RKA generator (500 keV, up to 30 kA, 100 ns) at CESTA [1] and future experiments will include the SPHINX facility (0.5-2MeV, 30 kA, 10 ns) at SNL [2]. Two similar experimental chambers, containing a large number of diagnostics, are being built at each institution for this fundamental science program. Diagnostics include a Cerenkov imaging line for spatial-temporal electron beam homogeneity analysis, PDV systems for plasma electron density measurements, and a grating for measurements of kinetic energy. These diagnostics are supported by standard electrical measurements such as B-dot probes and Faraday cups. The experimental data are used to compare to the EMPIRE code developed at SNL [3] as well as the CALDER code at CEA [4].
[1] K. Pepitone, J. Gardelle and P. Modin, Journal of Applied Physics 117, 183301 (2015);
[2] N. R. Joseph, M. E. Savage, J. C. Stephens, J. A. Lott, B. A. Lewis, R. D. Thomas, M. A. Torres, and E. G. Holman, in 2015 IEEE Pulsed Power Conference (PPC), (2015), pp. 1–5.
[3] A. Markosyan, C. H. Moore, M. T. Bettencourt, J. C. Bennett, J. J. Lifflander, D. S. Hollman, J. J. Wilke, K. Hemanth, Particle in Cell Algorithms and Codes Towards Next Generation Architectures, 70th GEC, 2017.
[4] F. Pérez, L. Gremillet, A. Decoster, M. Drouin and E. Lefebvre, Phys . Plasmas 19, 083104 (2012)
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525
