Observation of Relativistic Effects in Collective Thomson Scattering

Ross, J. S.; Glenzer, S. H.; Palastro, J. P.; Pollock, B. B.; Price, D.; Divol, L.; Tynan, G. R.; Froula, D. H.

doi:10.1103/physrevlett.104.105001

Cited by 44 publications

(21 citation statements)

References 22 publications

(24 reference statements)

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“…A complication in the (weakly) relativistic theory that should be noted is the relation between momentum and velocity (17), which is now dependent on the spin variable. Moreover, when closing the system, the polarization (23) associated with the spin must be included in the current and charge density (19), and the expression for the free current density (21) is affected due to the aforementioned relation (17). It should also be stressed that the spin variable used to define f (x, p, s, t) refers to the rest-frame spin, which is convenient, as two spherical angles for the spin variables are sufficient.…”

Section: Discussionmentioning

confidence: 99%

“…In nature, such dense relativistic plasmas can be found in planetary interiors and in stars [18]. Moreover, relativistic contributions to such plasma dynamics are under many circumstances very important [19]. Thus, when the parameters take values characteristic of the quantum relativistic regime, one needs to consider more complex dynamical models in order to obtain accurate descriptions of a host of phenomena.…”

Section: Introductionmentioning

confidence: 99%

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Semi-relativistic effects in spin-1/2 quantum plasmas

et al. 2012

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Emerging possibilities for creating and studying novel plasma regimes, e.g. relativistic plasmas and dense systems, in a controlled laboratory environment also require new modeling tools for such systems. This motivates theoretical studies of the kinetic theory governing the dynamics of plasmas for which both relativistic and quantum effects occur simultaneously. Here, we investigate relativistic corrections to the Pauli Hamiltonian in the context of a scalar kinetic theory for spin-1/2 quantum plasmas. In particular, we formulate a quantum kinetic theory for the collective motion of electrons that takes into account effects such as spin-orbit coupling and Zitterbewegung. We discuss the implications and possible applications of our findings. Contents

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Semi-relativistic effects in spin-1/2 quantum plasmas

et al. 2012

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“…The diagnostic is also used for measurements of the ion temperature (Stejner et al 2013(Stejner et al , 2015, isotope ratio (Korsholm et al 2011;Stejner et al 2011Stejner et al , 2013Stejner et al , 2012a, and plasma rotation (Stejner et al 2015(Stejner et al , 2016. In inertial confinement fusion experiments, laser-based CTS is regularly used for ion temperature measurements (Glenzer et al 1997;Ross et al 2010). The infrared-laser-based diagnostic has been used in the JT-60U tokamak (Kondoh et al 2003;Kondoh 1997; and was considered as an option for ITER ), but in the end, the microwave-based diagnostic was preferred.…”

Section: Collective Thomson Scatteringmentioning

confidence: 99%

Recent progress in fast-ion diagnostics for magnetically confined plasmas

Moseev

Salewski

García-Muñoz

et al. 2018

Rev. Mod. Plasma Phys.

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On the road to a fusion reactor, a thorough control of the fast-ion distribution plays a crucial role. Fusion-born -particles are, indeed, a necessary ingredient of selfsustained burning plasmas. Recent developments in the diagnostic of fast-ion distributions have significantly improved our predictive capabilities towards future devices. Here, we review key diagnostic techniques for confined and lost fast ions in tokamak and stellarator plasmas. We discuss neutron and gamma-ray spectroscopy, fast-ion D-spectroscopy, collective Thomson scattering, neutral particle analyzers, and fast-ion loss detectors. The review covers physical principles of each diagnostic, sensitivities, basic setups, and operational parameters. The review is largely (but not exclusively) based on the contributions from ASDEX Upgrade and JET. Finally, we discuss integrated data analysis of fast-ion diagnostics by velocity-space tomography which allows measurements of 2D velocity distribution functions of confined fast ions.

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“…expðixtÞBðy; tÞ rr;1 (10) and so on forẼðy; xÞð' Àcn ÂBðy; xÞÞ. Below, we shall employ some standard transformations, 16,17,21,23 allowing to reduce the above spectral asymptotic fields to more amenable representations for the case of a general non-monochromatic incoming plane wave, thereby extending directly the integral representations treated in Ref.…”

Section: A Integral Representationsmentioning

confidence: 99%

Nonlinear relativistic single-electron Thomson scattering power spectrum for incoming laser of arbitrary intensity

et al. 2012

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The classical nonlinear incoherent Thomson scattering power spectrum from a single relativistic electron with incoming laser radiation of any intensity, investigated numerically by the present authors in a previous publication, displayed both an approximate quadratic behavior in frequency and a redshift of the power spectrum for high intensity incoming radiation. The present work is devoted to justify, in a more general setup, those numerical findings. Those justifications are reinforced by extending suitably analytical approaches, as developed by other authors. Moreover, our analytical treatment exhibits differences between the Doppler-like frequencies for linear and circular polarization of the incoming radiation. Those differences depend nonlinearly on the laser intensity and on the electron initial velocity and do not appear to have been displayed by previous authors. Those Doppler-like frequencies and their differences are validated by new Monte Carlo computations beyond our previuos ones and reported here.

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Observation of Relativistic Effects in Collective Thomson Scattering

Cited by 44 publications

References 22 publications

Semi-relativistic effects in spin-1/2 quantum plasmas

Semi-relativistic effects in spin-1/2 quantum plasmas

Recent progress in fast-ion diagnostics for magnetically confined plasmas

Nonlinear relativistic single-electron Thomson scattering power spectrum for incoming laser of arbitrary intensity

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