1 / 9

FOM-Institute for Plasma Physics Rijnhuizen Association Euratom-FOM

FOM-Institute for Plasma Physics Rijnhuizen Association Euratom-FOM.

erno
Download Presentation

FOM-Institute for Plasma Physics Rijnhuizen Association Euratom-FOM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FOM-Institute for Plasma Physics Rijnhuizen Association Euratom-FOM PSI spectroscopy of hydrocarbons and erosion in Pilot-PSIGerard van RooijPilot & Magnum team:J. Westerhout, W.A.J. Vijvers, R.S. Al, H.J.N. van Eck, B. de Groot, W.R. Koppers, H.J. van der Meiden, P.R. Prins, M.J. van de Pol, P.H.M. Smeets, J. Scholten,W.J. Goedheer, A.W. Kleyn, N.J. Lopes CardozoS. Brezinsek, FZJ Jülich R. Engeln, D.C. Schram, Eindhoven University of TechnologyD.G. Whyte, MIT

  2. Coils cathode Arc Thomson Scattering H2 plasma Spectroscopy anode Pilot-PSI: experimental Coils 0.55 m Target Arc Spectroscopy Thomson Scattering

  3. Density and temperature near the target 532nm Thomson Scattering at 17 mm from target 17 mm Scattered light analyzed spectrally and spatially resolved

  4. Parameter range at target realized in Pilot >1023 H+/m2s >1024 H+/m2s >1025 H+/m2s • Gion = 0.6· ne· cs,i(Te) • Experimental knobs: • Source current & flow • Vessel pressure • Magnetic field • Target potential

  5. Target calorimetry confirms flux from ne,Te Measured in target cooling water: 1.0 kW  this is 10 MW/m2 ! 100 s exposure = 1027 H+/m2 !!! Integration of flux profile for B = 0.4 T gives total Gion: Gion= 3.2·1020 H+/s  this is 40% of input gas flow! Flux corresponds to 1.0 kW power (assuming Eion+Ediss+5/2 k(Te+Ti) )

  6. Exposure of carbon to 1026 H+/m2 • Target 5mm x 30mm, fine grain, Carbon SGL Group, R 6650 • Power to target cooling water: 0.9 kW • Thomson scattering: ne = 9±1·1019, Te = 4.0 ± 0.2 eV • 100 sec exposure time • Target grounded: 50 A net current Auger spectroscopy shows no target contamination IR spectrum indicates no excessive surface temp. Eroded crater < 5 mm; agrees with Ychem and no redeposition (~4 mm)

  7. target H spectrometer (ADAS) (Hydkin) Ychem from spectroscopy Hg CH Hd

  8. Pilot exposures compared to the Ychem curve To be considered: Calibration required by CH4 puffing Surface temperature unknown

  9. Conclusions Pilot-PSI offers >1026 H+/m2 exposures at ne up to 2·1021 m-3 and Te up to 4 eV First Ychem determinations based on spectroscopy demonstrated for >1024 H+/m2s; in line with literature

More Related