Results 1 to 10 of about 357 (69)

Study of ion cyclotron emission excited by tritium ions of fusion products via magnetoacoustic cyclotron instability theory in the EAST

Nuclear Fusion
This study investigates the ion cyclotron emission (ICE) excited by tritium ions generated through deuterium‒deuterium fusion reactions in the Experimental Advanced Superconducting Tokamak (EAST). ICE is an electromagnetic instability driven by fast ions,
Huapeng Zhang, Lunan Liu, Wei Zhang, Xuan Sun, Xinjun Zhang, Baolong Hao   +5 more
doaj   +3 more sources

Interpretation of core ion cyclotron emission driven by sub-Alfvénic beam-injected ions via magnetoacoustic cyclotron instability [PDF]

Nuclear Fusion, 2019
Core ion cyclotron emission (ICE) signals have recently been observed in beam-heated plasmas on several tokamaks. In this manuscript we present experimental evidence in support of core ICE being generated by the magnetoacoustic cyclotron instability (MCI), itself driven by the velocity-space inversion of sub-Alfvenic beam-injected ions.
Roman Ochoukov, Ken Mcclements, Benjamin Chapman   +2 more
exaly   +3 more sources

Effects of deuterium-tritium mix on linear growth rates of the magnetoacoustic cyclotron instability in fusion plasmas

Physics of Plasmas
Spontaneously excited ion cyclotron emission (ICE) provides a passive diagnostic of the physics of energetic ions in most contemporary toroidal magnetically confined fusion plasmas. ICE is typically driven by spatially localized, strongly non-Maxwellian, energetic ion populations relaxing collectively under the magnetoacoustic cyclotron instability ...
Richard Dendy, Sandra C Chapman, Tobias Slade-Harajda   +2 more
exaly   +2 more sources

Geomagnetic disturbances on ground associated with particle precipitation during SC [PDF]

, 2010
We have examined several cases of magnetosphere compression by solar wind pressure pulses using a set of instruments located in the noon sector of auroral zone. We have found that the increase in riometric absorption (sudden commencement absorption, SCA)
Honary, F., Kozlovsky, A., Safargaleev, V., Turunen, T., Voronin, A.   +4 more
core   +14 more sources

Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability [PDF]

Nuclear Fusion, 2020
Abstract Bursts of ion cyclotron emission (ICE), with spectral peaks corresponding to the hydrogen cyclotron harmonic frequencies in the plasma core are detected from helium plasmas heated by sub-Alfvénic beam-injected hydrogen ions in the ASDEX Upgrade tokamak. Based on the fast ion distribution function obtained from TRANSP/NUBEAM code,
Lunan Liu, R. Ochoukov, K.G. McClements, R.O. Dendy, V. Bobkov, M. Weiland, R. Bilato, H. Faugel, D. Moseev, M. Salewski, Wei Zhang, Xinjun Zhang, Yubao Zhu, B. Chapman, A. Zalzali   +14 more
openaire   +2 more sources

A linear parameters study of ion cyclotron emission using drift ring beam distribution

Nuclear Fusion, 2023
Ion Cyclotron Emission (ICE) holds great potential as a diagnostic tool for fast ions in fusion devices. The theory of Magnetoacoustic Cyclotron Instability (MCI), as an emission mechanism for ICE, states that MCI is driven by a velocity distribution of ...
Haozhe Kong, Huasheng Xie, Jizhong Sun
doaj   +1 more source

Sub-microsecond temporal evolution of edge density during edge localized modes in KSTAR tokamak plasmas inferred from ion cyclotron emission [PDF]

, 2019
During edge localised mode (ELM) crashes in KSTAR deuterium plasmas, bursts of spectrally structured ion cyclotron emission (ICE) are detected. Usually the ICE spectrum chirps downwards during an ELM crash, on sub-microsecond timescales.
Chapman, B., Chapman, S. C., Dendy, R. O., Kim, MH, McClements, K. G., Thatipamula, S. G., Yun, G. S.   +6 more
core   +5 more sources

Quantifying fusion born ion populations in magnetically confined plasmas using ion cyclotron emission [PDF]

, 2016
Ion cyclotron emission (ICE) offers unique promise as a diagnostic of the fusion born alpha-particle population in magnetically confined plasmas. Pioneering observations from JET and TFTR found that ICE intensity $P_{ICE}$ scales approximately linearly ...
Carbajal, L., Chapman, S. C., Cook, J. W. S., Dendy, R. O.   +3 more
core   +2 more sources

Farley-Buneman Instability in the Solar Chromosphere [PDF]

, 2009
The Farley-Buneman instability is studied in the partially ionized plasma of the solar chromosphere taking into account the finite magnetization of the ions and Coulomb collisions.
Gogoberidze, G., Goossens, M., Poedts, S., Voitenko, Y.   +3 more
core   +2 more sources

Magnetohydrodynamic oscillations in the solar corona and Earth's magnetosphere : towards consolidated understanding [PDF]

, 2015
Magnetohydrodynamic (MHD) oscillatory processes in different plasma systems, such as the corona of the Sun and the Earth’s magnetosphere, show interesting similarities and differences, which so far received little attention and remain underexploited. The
Heilig, B., Jelínek, P., Karlický, M., Klimushkin, D. Y., Kolotkov, Dmitrii, Lee, D. -H., Nakariakov, V. M. (Valery M.), Nisticò, Giuseppe, Pilipenko, V., Van Doorsselaere, T., Verth, G., Zimovets, I. V.   +11 more
core   +4 more sources