UKAEA Journals

Showing 1 - 3 of 3 Journals Results
2021
UKAEA-CCFE-PR(21)09
"Density dependence of ion cyclotron emission from deuterium plasmas in the Large Helical Device"

B. C. G. Reman R. O. Dendy T. Akiyama S. C. Chapman J. W. S. Cook H. Igami S. Inagaki K. Saito M.H. Kim S.G. Thatipamula G. S. Yun

Ion cyclotron emission (ICE) driven by perpendicular neutral beam-injected (NBI) deuterons, together with the distinctive ICE driven by tangential NBI, have been observed from heliotron-stellarator plasmas in the Large Helical Device (LHD). Radio frequency radiation in the lower hybrid range has also been observed, with frequency dependent on plasm…

Preprint
2020
UKAEA-CCFE-PR(21)48
"Interpretation of transient bursts of ion cyclotron emission from fusion-born protons in deuterium plasmas in the Large Helical Device"

B. C. G. Reman R. O. Dendy T. Akiyama M. Salewski S.C. Chapman J. W. S. Cook H. Igami S. Inagaki K. Saito R.Seki G. S. Yun

During bursty MHD events, transient ion cyclotron emission (ICE) is observed from deuterium plasmas in the Large Helical Device (LHD) heliotron-stellarator. Unusually, the frequencies of the successive ICE spectral peaks are not close to integer multiples of the local cyclotron frequency of an energetic ion population in the likely emitting region.…

Preprint
2019
UKAEA-CCFE-PR(19)24
"Interpreting observations of ion cyclotron emission from Large Helical Device plasmas with beam-injected ion populations"

B C G Reman R O Dendy T Akiyama S C Chapman J W S Cook H Igami S Inagaki K Saito G S Yun

Ion cyclotron emission (ICE) is detected from all large toroidal magnetically conned fusion (MCF) plasmas. It is a form of spontaneous suprathermal radiation, whose spectral peak frequencies correspond to sequential cyclotron harmonics of energetic ion species, evaluated at the emission location. We first present an account of the worldwide exper…

Preprint Published