全部文献期刊会议图书|学者科研项目
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作者:A.S. Jacobsen , M.Y. Chan
来源:[J].Journal of Pediatric Surgery(IF 1.383), 2011, Vol.46 (3), pp.554-558
摘要:Abstract(#br)Malignant peripheral nerve sheath tumor is a rare neurogenic tumor that usually presents in geriatic patients. Typically, it is found in the trunk and extremities and rarely presents in the head and neck region. It may mimic a carotid body tumor when it presents in t...
作者:A.S. Jacobsen , V.G. Kiptily ...
来源:[J].Journal of Instrumentation(IF 1.869), 2019, Vol.14 (5)
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:A.S. Jacobsen , F. Binda ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (5)
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:A.S. Jacobsen , F. Orain ...
来源:[J].Nuclear Fusion(IF 2.734), 2019, Vol.59 (6)
摘要:The interaction between fast-ions and edge localized modes (ELMs) is investigated by means of fast-ion loss detector measurements. Fast-ion losses are increased during ELMs exhibiting a 3D filamentary-like behaviour. An accelerated beam ion population has been observed during ELM...
作者:A.S. Jacobsen , I. Abramovic ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (3)
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:A.S. Jacobsen , T. Jensen ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (9)
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:A.S. Jacobsen , M. Salewski ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (5)
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...
作者:A.S. Jacobsen , D. Rittich ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (8)
摘要:The neutral beam current drive efficiency has been investigated in the ASDEX Upgrade tokamak by replacing on-axis neutral beams with tangential off-axis beams. A clear modification of the radial fast-ion profiles is observed with a fast-ion D-alpha diagnostic that measures centra...
作者:A.S. Jacobsen , V.G. Kiptily ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (9)
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:A.S. Jacobsen , P.C. Hansen ...
来源:[J].Nuclear Fusion(IF 2.734), 2016, Vol.56 (10)
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 ...

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