Results 11 to 20 of about 30,961 (212)

Quantifying Fusion Born Ion Populations in Magnetically Confined Plasmas using Ion Cyclotron Emission [PDF]

Physical Review Letters, 2017
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 with the measured neutron flux from fusion reactions, and with the inferred concentration, $n_ /n_i$,
Carbajal, L., Dendy, R. O., Chapman, S. C., Cook, J. W. S.   +3 more
openaire   +6 more sources

Observations of core ion cyclotron emission on ASDEX Upgrade tokamak [PDF]

Review of Scientific Instruments, 2018
The B-dot probe diagnostic suite on the ASDEX Upgrade tokamak has recently been upgraded with a new 125 MHz, 14 bit resolution digitizer to study ion cyclotron emission (ICE). While classic edge emission from the low field side plasma is often observed, we also measure waves originating from the core with fast fusion protons or beam injected deuterons ...
R. Ochoukov, V. Bobkov, B. Chapman, R. Dendy, M. Dunne, H. Faugel, M. García-Muñoz, B. Geiger, P. Hennequin, K. G. McClements, D. Moseev, S. Nielsen, J. Rasmussen, P. Schneider, M. Weiland, J.-M. Noterdaeme   +15 more
core   +13 more sources

Oxygen Attachment Dissociation of Protonated Reserpine and Its Analogs. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Carbon–carbon double bonds are ubiquitous structural motifs in natural products and pose a key challenge in locating their presence in analytes via MS‐based methods. Here, we use the alkaloid reserpine as a model system to examine whether OAD reactions can locate quaternary double bonds embedded in fused multicyclic structures ...
Li JG, Bowen CJ, Chan B, Stewart AWE, Takahashi H, O'Hair RAJ.   +5 more
europepmc   +2 more sources

Interpretation of ion cyclotron emission in the HL-2A tokamak

Nuclear Fusion
We report the first interpretation of ion cyclotron emission (ICE) based on the frequency variation in HL-2A tokamak experiments. The measured frequencies of ICE are concentrated around the ion cyclotron frequency, while simultaneously exhibiting a ...
Linzi Liu, Ruihai Tong, Haozhe Kong, Huasheng Xie, Huiling Wei, Guoliang Xiao, Zengchen Yang, Yonggao Li, Yang Chen, Min Jiang, Guangzhou Hao, Ji Xiaoquan, Li Bo, Li Jiquan, Zhongbin Shi, Min Xu, Wulyu Zhong, HL-2A team   +17 more
doaj   +2 more sources

Alfven cyclotron instability and ion cyclotron emission [PDF]

Nuclear Fusion, 1995
Two-dimensional solutions of compressional Alfven eigenmodes (CAEs) are studied in the cold plasma approximation. For finite inverse aspect ratio tokamak plasmas the two-dimensional eigenmode envelope is localized at the low magnetic field side with the radial and poloidal localization on the order of a/ square root m and a/4 square root m ...
N.N Gorelenkov, C.Z Cheng
openaire   +3 more sources

A model of so-called "Zebra" emissions in solar flare radio burst continua [PDF]

Annales Geophysicae, 2011
A simple mechanism for the generation of electromagnetic "Zebra" pattern emissions is proposed. "Zebra" bursts are regularly spaced narrow-band radio emissions on the otherwise broadband radio continuum emitted by the active solar corona.
R. A. Treumann, R. A. Treumann, R. A. Treumann, R. Nakamura, W. Baumjohann   +4 more
doaj   +1 more source

Multi-strand coronal loop model and filter-ratio analysis [PDF]

, 2009
We model a coronal loop as a bundle of seven separate strands or filaments. Each of the loop strands used in this model can independently be heated (near their left footpoints) by Alfv\'en/ion-cyclotron waves via wave-particle interactions.
Bourouaine, S., Marsch, E.
core   +3 more sources

Identification of core ion cyclotron instabilities on HL-2A tokamak

Nuclear Fusion, 2023
Instabilities in multiplies of ion cyclotron frequency range are identified and termed as core ion cyclotron emission (ICE) in recent HL-2A neutral beam injection heated experiments.
Linzi Liu, Ruihai Tong, Xiaolan Zou, Haotian Chen, Yang Chen, Guanqi Dong, Guangzhou Hao, Xiaoxue He, Yuxiao Han, Xiaoquan Ji, Anshu Liang, Bo Li, Jiquan Li, Yonggao Li, Liang Liu, Zhongbin Shi, Huiling Wei, Fan Xia, Guoliang Xiao, Jiao Yin, Deliang Yu, Boda Yuan, Yiren Zhu, Wulyu Zhong, Min Xu, HL-2A team   +25 more
doaj   +1 more source

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

Core plasma ion cyclotron emission driven by fusion-born ions [PDF]

Nuclear Fusion, 2018
Ion cyclotron emission (ICE) signals whose spectral peaks match the fundamental cyclotron frequencies of hydrogen and tritium in the plasma core, near the magnetic axis, are observed in ASDEX Upgrade deuterium plasmas. In these cases the only source of energetic (⩾1 MeV) hydrogen and tritium ions is D–D fusion reactions between neutral beam injected ...
R. Ochoukov, R. Bilato, V. Bobkov, B. Chapman, S.C. Chapman, R.O. Dendy, M. Dunne, H. Faugel, M. García-Muñoz, B. Geiger, A. Kallenbach, A. Kappatou, K.G. McClements, D. Moseev, S. Nielsen, J. Rasmussen, P. Schneider, M. Weiland, J.-M. Noterdaeme   +18 more
openaire   +3 more sources