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Title: Crossed-beam energy transfer: polarization effects and evidence of saturation

In this article, recent results on crossed-beam energy transfer are presented. Wave-length tuning was used to vary the amount of energy transfer between two beams in a quasi-stationary plasma with carefully controlled conditions. The amount of transfer agreed well with calculations assuming linear ion acoustic waves with amplitudes up to δn/n ≈ 0.015. Increasing the initial probe intensity to access larger ion acoustic wave amplitudes for otherwise fixed conditions yields evidence of saturation. The ability to manipulate a beam’s polarization, which results from the anisotropic nature of the interaction, is revisited; an example is provided to demonstrate how polarization effects in a multibeam situation can dramatically enhance the expected amount of energy transfer.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of York (United Kingdom). York Plasma Inst.
Publication Date:
Report Number(s):
2017-54, 1394; LLNL-JRNL-758163
Journal ID: ISSN 0741-3335; 2017-54,1394, 2352
Grant/Contract Number:
NA0001944; AC52-07NA27344; 42074; EP/K504178/1; EP/L000644/1
Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 5; Conference: 47th Annual Anomalous Absorption Conference, Florence, OR 11-16 June 2017; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Research Org:
Univ. of Rochester, NY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); New York State Energy Research and Development Authority (NYSERDA); Engineering and Physical Sciences Research Council (EPSRC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1434633
Alternate Identifier(s):
OSTI ID: 1476175

Turnbull, D., Colaitis, A., Follett, R. K., Palastro, J. P., Froula, D. H., Michel, P., Goyon, C., Chapman, T., Divol, L., Kemp, G. E., Mariscal, D., Patankar, S., Pollock, B. B., Ross, J. S., Moody, J. D., Tubman, E. R., and Woolsey, N. C.. Crossed-beam energy transfer: polarization effects and evidence of saturation. United States: N. p., Web. doi:10.1088/1361-6587/aab6d3.
Turnbull, D., Colaitis, A., Follett, R. K., Palastro, J. P., Froula, D. H., Michel, P., Goyon, C., Chapman, T., Divol, L., Kemp, G. E., Mariscal, D., Patankar, S., Pollock, B. B., Ross, J. S., Moody, J. D., Tubman, E. R., & Woolsey, N. C.. Crossed-beam energy transfer: polarization effects and evidence of saturation. United States. doi:10.1088/1361-6587/aab6d3.
Turnbull, D., Colaitis, A., Follett, R. K., Palastro, J. P., Froula, D. H., Michel, P., Goyon, C., Chapman, T., Divol, L., Kemp, G. E., Mariscal, D., Patankar, S., Pollock, B. B., Ross, J. S., Moody, J. D., Tubman, E. R., and Woolsey, N. C.. 2018. "Crossed-beam energy transfer: polarization effects and evidence of saturation". United States. doi:10.1088/1361-6587/aab6d3.
@article{osti_1434633,
title = {Crossed-beam energy transfer: polarization effects and evidence of saturation},
author = {Turnbull, D. and Colaitis, A. and Follett, R. K. and Palastro, J. P. and Froula, D. H. and Michel, P. and Goyon, C. and Chapman, T. and Divol, L. and Kemp, G. E. and Mariscal, D. and Patankar, S. and Pollock, B. B. and Ross, J. S. and Moody, J. D. and Tubman, E. R. and Woolsey, N. C.},
abstractNote = {In this article, recent results on crossed-beam energy transfer are presented. Wave-length tuning was used to vary the amount of energy transfer between two beams in a quasi-stationary plasma with carefully controlled conditions. The amount of transfer agreed well with calculations assuming linear ion acoustic waves with amplitudes up to δn/n ≈ 0.015. Increasing the initial probe intensity to access larger ion acoustic wave amplitudes for otherwise fixed conditions yields evidence of saturation. The ability to manipulate a beam’s polarization, which results from the anisotropic nature of the interaction, is revisited; an example is provided to demonstrate how polarization effects in a multibeam situation can dramatically enhance the expected amount of energy transfer.},
doi = {10.1088/1361-6587/aab6d3},
journal = {Plasma Physics and Controlled Fusion},
number = 5,
volume = 60,
place = {United States},
year = {2018},
month = {4}
}