# Pitch angle scattering and synchrotron radiation of relativistic runaway electrons in tokamak stochastic magnetic fields

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Investigates the emission of synchrotron radiation for diagnostic purposes in hot large major radius tokamaks for arbitrary angles with respect to the magnetic field. Localization of the source of radiation in ordinary and momentum spaces yielding a kind of selective diagnostics of the...

- Modification of emission from the X-mode at the third electron cyclotron harmonic from mode... Swanson, D.G.; Ng, C.S. // Physics of Plasmas;Mar1995, Vol. 2 Issue 3, p599
Analyzes the absorption and emission of the X-mode in the vicinity of the third electron cyclotron harmonic in a weakly inhomogeneous magnetic field. Solution of the mode conversion problem both without absorption and with synchrotron absorption and emission; Numerical values for the reflection...

- Measurement of the runaway electrons in the HT-7 tokamak. Chen, Z. Y.; Wan, B. N.; Lin, S. Y.; Shi, Y. J.; Hu, L. Q.; Gong, X. Z.; Lin, H.; Asif, M. // Review of Scientific Instruments;Jan2006, Vol. 77 Issue 1, p013502
A thermographic camera and four hard x-ray detectors have been developed to measure the runaway electrons in the HT-7 tokamak. The synchrotron radiation originated from the runaway electrons was measured by an infrared (IR) camera working in the wavelength ranges of 7.5â€“13 Î¼m. With a...

- On the effect of synchrotron radiation and magnetic fluctuations on the avalanche runaway growth rate. Martín-Solís, J. R.; Sánchez, R.; Esposito, B. // Physics of Plasmas;Sep2000, Vol. 7 Issue 9
The avalanche runaway growth rate was recently determined by analysis of the trajectories of the secondary runaway electrons in momentum space [Parks et al., Phys. Plasmas 6, 2523 (1999)]. Here, such an approach is used to study the effect of the electron synchrotron radiation and the magnetic...

- Synchrotron Radiation of Electrons in Periodic Weakly-Focusing Magnetic Fields. Shishanin, O. E. // Journal of Experimental & Theoretical Physics;May2000, Vol. 90 Issue 5, p725
The dynamics of an electron in a weakly focusing accelerator with rectilinear gaps is studied by the method of averaging and by the perturbation method. The asymptotic solutions found are used to investigate the angular properties of the synchrotron radiation of electrons. It is shown that...

- Features of accelerated electron beam formation in LHCD experiments on FT-2 tokamak. Lashkul, S.; Rozhdestvensky, V.; Altukhov, A.; Dyachenko, V.; Esipov, L.; Kantor, M.; Krikunov, S.; Kuprienko, D.; Stepanov, A. // Technical Physics Letters;Dec2012, Vol. 38 Issue 12, p1073
In experiments with lower hybrid current drive (LHCD) on the FT-2 tokamak, lower hybrid (LH) waves have been successfully used for the first time to ensure effective additional heating of plasma electrons from 450 to 600 eV ( I = 32 kA, Î” t = 14 ms, P = 100 kW, F = 920 MHz). Several factors...

- The contribution of cyclotron heating induced spatial modulation of electron magnetization to tokamak current drive. Hayes, M. A.; Brown, M. R. // Physics of Fluids (00319171);Jan86, Vol. 29 Issue 1, p247
Application to a tokamak of electron-cyclotron resonant heating (ECRH) injected at a given poloidal angle will result in a small but important variation of average electron magnetic moment with poloidal angle. This, coupled with the dependence of magnetic field strength on poloidal angle, will...

- Synchrotron radiation from a runaway electron distribution in tokamaks. Stahl, A.; Landreman, M.; Papp, G.; Hollmann, E.; Fülöp, T. // Physics of Plasmas;Sep2013, Vol. 20 Issue 9, p093302
The synchrotron radiation emitted by runaway electrons in a fusion plasma provides information regarding the particle momenta and pitch-angles of the runaway electron population through the strong dependence of the synchrotron spectrum on these parameters. Information about the runaway density...

- A simple theory of relativistic damping of electromagnetic cyclotron and electron Bernstein waves in tokamaks. Cairns, R. A.; Lashmore-Davies, C. N. // AIP Conference Proceedings;2001, Vol. 595 Issue 1, p430
An approximation to the relativistic broadening of an electron cyclotron resonance is obtained by including only the effect of the momentum parallel to the magnetic field. This approximation is then applied to the calculation of the absorption of the electromagnetic X-mode and compared to the...