Results 1 to 10 of about 43 (32)

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

Nuclear Fusion
Abstract 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, and its excitation mechanism is primarily explained by magnetoacoustic ...
Huapeng Zhang, Lunan Liu, Wei Zhang, Xuan Sun, Xinjun Zhang, Baolong Hao   +5 more
exaly   +4 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.
R. Ochoukov, K.G. McClements, R. Bilato, V. Bobkov, B. Chapman, S.C. Chapman, R.O. Dendy, M. Dreval, H. Faugel, J.-M. Noterdaeme, M. Salewski, M. Weiland   +11 more
openaire   +4 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 ...
T. W. Slade-Harajda, J. W. S. Cook, R. O. Dendy, S. C. Chapman   +3 more
openaire   +3 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

Predicting ion cyclotron emission from neutral beam heated plasmas in Wendelstein7-X stellarator

Nuclear Fusion
Measurements of ion cyclotron emission (ICE) are planned for magnetically confined fusion plasmas heated by neutral beam injection (NBI) in the Wendelstein 7-X stellarator (W7-X).
O. Samant, R.O. Dendy, S.C. Chapman, D. Moseev, R. Ochoukov   +4 more
doaj   +1 more source

The consequences of tritium mix for simulated ion cyclotron emission spectra from deuterium-tritium plasmas

Nuclear Fusion
Measurements of ion cyclotron emission (ICE) are obtained from most large magnetically confined fusion plasma experiments, and may be used in future to quantify properties of the fusion-born alpha-particle population in deuterium-tritium (DT) plasmas in ...
T.W. Slade-Harajda, S.C. Chapman, R.O. Dendy   +2 more
doaj   +1 more source

Physics of beam-driven ion cyclotron emission in the large plasma device

Nuclear Fusion
Ion cyclotron emission (ICE) is widely observed from spatially localised minority energetic ion populations in toroidal magnetically confined fusion (MCF) plasmas, both tokamaks and stellarators.
O. Samant, R.O. Dendy, S.C. Chapman, S.K.P. Tripathi, T. Carter, B. Van Compernolle, J.W.S. Cook   +6 more
doaj   +1 more source

Simulations of ion cyclotron emission from highly energetic fusion-born protons in aneutronic deuterium-helium-3 plasmas

Nuclear Fusion
Studies of future aneutronic fusion plasmas, such as those comprising deuterium and helium-3 (D– $^3\mathrm{He}$    $\rightarrow \mathrm{^4He}+p$ ), may not be able to exploit neutron-based diagnostics for direct measurement of fusion reactivity.
T.W. Slade-Harajda, R.O. Dendy, S.C. Chapman   +2 more
doaj   +1 more source

On the 2D dynamics of the magnetoacoustic cyclotron instability driven by fusion-born ions

Physics of Plasmas, 2021
In this work, we present advances in the numerical modeling of the non-linear magnetoacoustic cyclotron instability (MCI) in relation to ion cyclotron emission (ICE) in fusion plasmas. We present the results of first 2D hybrid simulations of the MCI showing that only when excited waves propagate obliquely to the background magnetic field, the ...
L. Carbajal, F. A. Calderón
openaire   +3 more sources