- LandOfFree
- Scientists
- Astronomy and Astrophysics
- Astrophysics
Details
Ion heating and velocity fluctuation measurements in a high-temperature laboratory plasma
Ion heating and velocity fluctuation measurements in a high-temperature laboratory plasma
Apr 2006
-
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..apr.d1039e&link_type=abstract
American Physical Society, APS April Meeting, April 22-26, 2006, abstract #D1.039
Astronomy and Astrophysics
Astrophysics
Scientific paper
In many astrophysical and laboratory plasmas the magnetic field and plasma temperature are affected by magnetic fluctuations. In the Madison Symmetric Torus we study the redistribution of magnetic field by correlated velocity and magnetic field fluctuations (the MHD dynamo, ) and ion heating during magnetic reconnection. Emission from neutral beam-induced charge exchange recombination is collected by a high-throughput spectrometer yielding localized measurements of impurity ion temperature and velocity with high time resolution. We find poloidal velocity fluctuations correlated with magnetic fluctuations for a range of wavenumbers and the phase implies a contribution to the MHD dynamo. The correlation is greatest near resonant surfaces, where the wavenumber parallel to the magnetic field vanishes. During reconnection events, fluctuation amplitudes increase, the stored magnetic energy decreases, and strong ion heating is observed. The heating mechanism is unclear, but the increase in ion energy is comparable to the decrease in stored magnetic energy. Measurements of both bulk and impurity ions suggest the impurities are more strongly heated than the bulk and the heating source is global. Work supported by U.S.D.O.E. and N.S.F.
Affiliated with
Also associated with
No associations
LandOfFree
Say what you really think
Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.
Rating
Ion heating and velocity fluctuation measurements in a high-temperature laboratory plasma does not yet have a rating.
At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ion heating and velocity fluctuation measurements in a high-temperature laboratory plasma, we encourage you to share that experience with our LandOfFree.com community.
Your opinion is very important and Ion heating and velocity fluctuation measurements in a high-temperature laboratory plasma will most certainly appreciate the feedback.
Rate now
Profile ID: LFWR-SCP-O-1158517
All data on this website is collected from public sources.
Our data reflects the most accurate information available at the time of publication.