英国物理学会
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作者:M. Salewski , B. Geiger ...
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (2)IOP
摘要:We present the first measurement of a local fast-ion 2D velocity distribution function f ( v , v ). To this end, we heated a plasma in ASDEX Upgrade by neutral beam injection and measured spectra of fast-ion D α (FIDA) light from the ...
作者:M. Salewski , M. Nocente ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (9)IOP
摘要:High-resolution γ -ray spectroscopy (GRS) measurements resolve spectral shapes of Doppler-broadened γ -rays. We calculate weight functions describing velocity-space sensitivities of any two-step reaction GRS measurements in magnetized plasmas using the resonant nuclear react...
作者:M. Salewski , M. Nocente ...
来源:[J].Nuclear Fusion(IF 2.734), 2016, Vol.56 (4)IOP
摘要:The spectral broadening of γ -rays from fusion plasmas can be measured in high-resolution gamma-ray spectrometry (GRS). We derive weight functions that determine the observable velocity space and quantify the velocity-space sensitivity of one-step reaction high-resolution GR...
作者:M. Salewski , B. Geiger ...
来源:[J].Nuclear Fusion(IF 2.734), 2016, Vol.56 (10)IOP
摘要:Velocity-space tomography of the fast-ion distribution function in a fusion plasma is usually a photon-starved tomography method due to limited optical access and signal-to-noise ratio of fast-ion D α (FIDA) spectroscopy as well as the strive for high-resolution ...
作者:M. Salewski , M. Nocente ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (5)IOP
摘要:We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spe...
作者:M. Salewski , B. Geiger ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (3)IOP
摘要:We measure the deuterium density, the parallel drift velocity, and parallel and perpendicular temperatures (, ) in non-Maxwellian plasmas at ASDEX Upgrade. This is done by taking moments of the ion velocity distribution function measured by tomographic inversion of five simu...
作者:M. Salewski , M. Nocente ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (9)IOP
摘要:We discuss α -particle velocity-space diagnostic in ITER based on the planned collective Thomson scattering (CTS) and γ -ray spectrometry (GRS) systems as well as ASCOT simulations of the α -particle distribution function. GRS is sensitive to α -particles with energies MeV a...
作者:M. Salewski , M. Nocente ...
来源:[J].Journal of Instrumentation(IF 1.869), 2019, Vol.14 (05)IOP
摘要:The measurement of the energy spectra and densities of Α-particles and other fast ions are part of the ITER measurement requirements, highlighting the importance of energy-resolved energetic-particle measurements for the mission of ITER. However, it has been found in recent ...
作者:... Y. Tatematsu , S.B. Korsholm , M. Salewski
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (2)IOP
摘要:A collective Thomson scattering (CTS) diagnostic was developed and used to measure the bulk and fast ions originating from 180 keV neutral beams in the Large Helical Device (LHD). Electromagnetic waves from a gyrotron at 77 GHz with 1 MW power output function as both the pro...
作者:M. Salewski , J. Eriksson ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (5)IOP
摘要:Neutron emission spectrometry (NES) measures the energies of neutrons produced in fusion reactions. Here we present velocity-space weight functions for NES and neutron yield measurements. Weight functions show the sensitivity as well as the accessible regions in velocity space fo...

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