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Mostrando ítems 191-200 de 228
Artículo
Fast ion transport during applied 3D magnetic perturbations on DIII-D
(IOP Publishing, 2015-07)
Measurements show fast ion losses correlated with applied three-dimensional (3D) fields in a variety of plasmas ranging from L-mode to resonant magnetic perturbation (RMP) edge localized mode (ELM) suppressed H-mode ...
Artículo
High-resolution tungsten spectroscopy relevant to the diagnostic of high-temperature tokamak plasmas
(2018-05)
The x-ray transitions in Cu- and Ni-like tungsten ions in the 5.19–5.26 A wavelength range that are relevant ˚ as a high-temperature tokamak diagnostic, in particular for JET in the ITER-like wall configuration, have been ...
Artículo
Investigation of deuterium trapping and release in the JET divertor during the third ILW campaign using TDS
(Elsevier, 2019-05)
Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed in 2015–2016 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with ...
Artículo
Identification of BeO and BeOxDy in melted zones of the JET Be limiter tiles: Raman study using comparison with laboratory samples
(Elsevier, 2018-12)
Beryllium oxide (BeO) and deuteroxide (BeOxDy) have been found on the melted zone of a beryllium tile extracted from the upper dump plate of JET-ILW (2011-2012 campaign). Results have been obtained using Raman microscopy, ...
Artículo
Tomography of fast-ion velocity-space distributions from synthetic CTS and FIDA measurements
(IOP Publishing, 2012-10)
We compute tomographies of 2D fast-ion velocity distribution functions from synthetic collective Thomson scattering (CTS) and fast-ion Dα (FIDA) 1D measurements using a new reconstruction prescription. Contradicting ...
Artículo
First measurements of a scintillator based fast-ion loss detector near the ASDEX Upgrade divertor
(AIP Publishing, 2018-08)
A new reciprocating scintillator based fast-ion loss detector has been installed a few centimeters above the outer divertor of the ASDEX Upgrade tokamak and between two of its lower Edge Localized Modes (ELM) mitigation ...
Artículo
A fast feedback controlled magnetic drive for the ASDEX Upgrade fast-ion loss detectors
(AIP Publishing, 2016-11)
A magnetically driven fast-ion loss detector system for the ASDEX Upgrade tokamak has been designed and will be presented here. The device is feedback controlled to adapt the detector head position to the heat load and ...
Artículo
Beam modelling and hardware design of an imaging heavy ion beam probe for ASDEX Upgrade
(IOP Publishing, 2019)
The imaging heavy ion beam probe (i-HIBP) developed at the ASDEX Upgrade tokamak is a new diagnostic concept for investigations at the edge of high temperature plasmas. By means of a heavy alkali beam injector, a neutral ...
Tesis Doctoral
Fast-ion transport induced by externally applied Resonant Magnetic Perturbations in the ASDEX Upgrade tokamak
(2019-07-17)
In magnetically con ned fusion plasmas, MHD instabilities such as the Edge Localized Modes (ELMs), present in current devices, need to be kept under control in order to avoid too high heat uxes on plasma facing components. ...
Artículo
Scintillator-based diagnostic for fast ion loss measurements on DIII-D
(AIP Publishing, 2010-10)
A new scintillator-based fast ion loss detector has been installed on DIII-D with the time response 100 kHz needed to study energetic ion losses induced by Alfvén eigenmodes and other MHD instabilities. Based on the ...