000264926 001__ 264926
000264926 005__ 20190812204800.0
000264926 037__ $$aCONF
000264926 245__ $$aThermal, electromagnetic and structural analysis of gas baffles for the TCV divertor upgrade
000264926 260__ $$c2019-03-07
000264926 269__ $$a2019-03-07
000264926 336__ $$aConference Papers
000264926 520__ $$aAs part of an ongoing divertor upgrade of the TCV tokamak it is planned to add gas baffles to form a divertor chamber of variable closure. The baffles promise to increase the compression of neutral particles in the divertor and, thereby, extend the research on the TCV divertor towards more reactor relevant, highly dissipative divertor regimes. It is foreseen to construct the baffles entirely of polycrystalline graphite that was used for the existing TCV protection tiles. The thermal considerations of the baffle design are based on the heat loads expected during normal operation, where even an extremely large increase in the power carrying plasma channel towards the baffle over the entire 2 seconds duration of a TCV discharge gives no cause for concern. An electromagnetic analysis considers halo currents flowing through the baffles, which can occur during disruptions, as a worst-case scenario. It is found that a halo current of 250 kA results in an average vertical force in the baffles of up to 950 kN/m3. The fixture of the baffle tiles to the vacuum vessel is designed for a maximum tensile stress of 31 MPa and maximum compressive stress of 60 MPa that remains a factor of two below their respective material limits. The obtained results of the thermal, electromagnetic and structural analysis thus validate the proposed baffle design.
000264926 6531_ $$aTCV
000264926 6531_ $$aDivertor
000264926 6531_ $$aPlasma facing components
000264926 6531_ $$aFinite element analysis
000264926 700__ $$aVaccaro, Dario
000264926 7112_ $$a30th Symposium on Fusion Energy $$cGiardini Naxos, Italy$$d September 16-21, 2018
000264926 8560_ $$fdario.vaccaro@epfl.ch
000264926 8564_ $$uhttps://infoscience.epfl.ch/record/264926/files/Manuscript_Vaccaro.docx$$s1183275
000264926 909C0 $$pSPC$$mstefano.coda@epfl.ch$$0252028$$zPasquier, Simon$$xU12272$$xU12268$$xU10558$$xU10635$$xU12266$$xU10636$$xU10137$$xU12270$$xU10557$$xU12273$$xU10559$$xU12271$$xU12269$$xU12267$$xU10136
000264926 909CO $$pconf$$pSB$$ooai:infoscience.epfl.ch:264926
000264926 960__ $$adario.vaccaro@epfl.ch
000264926 961__ $$apierre.devaud@epfl.ch
000264926 973__ $$aEPFL$$rREVIEWED
000264926 980__ $$aCONF
000264926 981__ $$aoverwrite