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Laser-based diagnostic for tracing magnetic-field lines in spheromaks and other self-organized magnetically confined plasmas
- Source :
- Review of Scientific Instruments. 74:1547-1550
- Publication Year :
- 2003
- Publisher :
- AIP Publishing, 2003.
-
Abstract
- We are in the process of testing a technique for measuring the magnetic-field line topology in magnetically confined plasmas. The basic idea is to use a high-powerful short-pulse laser to launch a burst of energetic (∼100 keV) electrons from a target passing through the plasma of interest; these electrons then generally follow field lines until they strike a solid surface, where a burst of x rays is produced and then detected. The field line connection length can be determined from the time delay between the laser pulse and the burst of x rays. The topology of the field lines can be inferred by measuring the connection length as a function of initial target location inside the plasma. Measuring the spatial distribution of the x-ray production will provide further information on the field topology, including the effects of magnetic-field fluctuations and stochasticity. The work will eventually include testing the appropriate x-ray detectors, measuring the background x-ray emission in a spheromak plasma, me...
Details
- ISSN :
- 10897623 and 00346748
- Volume :
- 74
- Database :
- OpenAIRE
- Journal :
- Review of Scientific Instruments
- Accession number :
- edsair.doi...........b8101eb17db0e09448749fa80f063dbd