Loading in 2 Seconds...
Loading in 2 Seconds...
Recent results from the Australian Plasma Fusion Research Facility.
B. D. Blackwell, J. Howard, D.G. Pretty, S. Haskey, J.Caneses, C. Corr, L. Chang, N. Thapar, J.W.Read, J. Bertram, B. Seiwald, C.A. Nuhrenberg, H. Punzmann, M. J. Hole, M. McGann, R.L. Dewar, F.J. Glass, J. Wach, M. Gwynneth, M. Blacksell
The Upgrade (2010-2013)
Result Overview: H-1NF
Aims Key areas
New diagnostics for Upgrade
Originally a Major National Research Facility established by the Commonwealth of Australia and the Australian National University
MoU’s for collaboration with:
Members of the IEA implementing agreement on development of stellarator concept.
National Institute of Fusion Science of Japan, Princeton Plasma Physics Lab
Australian Nuclear Science and Technology Organisation
2009Australian Budget Papers
Antenna contoured to plasma shape
Coherence Imaging Camera
Screenshot of web browser at http://h1ds.anu.edu.au/mdsplus/H1DATA/58063/TOP/OPERATIONS/MIRNOV/A14_14/INPUT_2/
twist per turn (transform)
Mirnov Array 1
Mirnov Array 220 pickup coils
0.2mThree Mirnov Arrays (Toroidal)
Singular vectors are grouped by similarity to separate simultaneous modes
Follows plasma shape, amplitude variation is much less
Helical Array resolves n and m, but not independently e.g. 9/7,8/7,7/6 sim.
PSD of chronos
res = k||VAlfvén = k||B/(o)
Numerical factor of ~ 1/3 required for quantitative agreement near resonance
Density fluctuations acoustic?
As k|| 0, the mode is expected to become more “sound-like”
b~llincreases as 0
Can be resolved by: B scan or polarization study
John HowardNandika ThaparJesse Read
Calibrating View Geometry with eBeams
Field lines from accurate magnetic model (red) are matched with ebeam images (black)
Vertical view of plasma light synchronised with the Mirnov signals and averaged over many cycles.
Left: Intensity profile at the cross-section of the dashed line
Right: CAS-3D MHD code prediction of electron density.
J. Howard, J. Read, J. Bertram , B. Blackwell
Howard, APFRF Facility and MDF – ANSTO 2010
Poloidal mode structure agrees with magnetic data on both sides of both 5/4 and 4/3 resonances
Mode appears to be located at outer minor radii
Raw spatial heterodyne image (0.1T Argon)
Interference fringes encode:
John HowardJesse Read
dI / I
Movie of plasma oscillation showing an Alfvénic MHD mode
View of plasma through H-1 porthole
Conditions approaching edge of Fusion reactor
MDF Prototype operational in new lab
Argon 1019/m3 3eV (Power density destroys probes above this)
H 1018/m3 (first tests~1kW) 5kW available, 20kW (2013)
dynamic tuning (100us) tried for Ar+ blue core
niAr - 1400W
Te Ar – 1400W
Ar low pwr
ni H 1200W
3mT Argon in MDF: Composite images of brightness and azimuthal flow speeds
antenna target region
Composite images of the brightness, azimuthal flow speed and argon ion temperature in the magnetic mirror region of the MDF device (3.0 mTorr)
K|| match requires ne to increase axially
Radial wave profiles in reasonable agreement – usually requires ~10ei
Further work required matching ne profiles in (r,z) with experiment