Stable Plasma Column
Production of a High Temperature Dense Plasma Column Stable in Time and Space.
Tech Area / Field
- PHY-PLS/Plasma Physics/Physics
8 Project completed
Senior Project Manager
Lapidus O V
FIAN Lebedev, Russia, Moscow
- VNIITF, Russia, Chelyabinsk reg., Snezhinsk\nSiberian Branch of RAS / Institute of High Current Electronics, Russia, Tomsk reg., Tomsk
- Sandia National Laboratories, USA, NM, Albuquerque
Project summaryThe problem of instabilities is in fact a key problem in a physics of a high-temperature plasma and Z-pinches in particularly. At the present work the development of methods of instability suppression and creation of a plasma column, ensuring a high uniformity of plasma parameters such as temperature and density is planned. The stable plasma column formation will allow to realise a predicted by numerous theoretical works temperature and density of a plasma, close to thermonuclear ones. It will open a possibility of wide using of Z-pinch plasma as an effective sources of powerful x-ray radiation in industry ( for example, for X-ray lithography and creation of an instruments for microscopy of biological objects ), as an active medium for short-wave laser, will allow to find new approaches to the decision of a confinement fusion problem. The plasma column will be created by means of compression of a gas liner ( hollow Z-pinch). A subject of research will be a process of formation of a plasma shell; development of Raleigh-Taylor (RT) and magneto-hydrodynamic (MHD) instabilities during liner implosion. The new approach to the decision of the problem of stability consists in application of a principle of multilayer gas puff, successfully realised by authors of the project . Application of the multilayer gas puff principle for RT instabilities suppression permits to receive an aspect ratio (start to final radius ratio) of the order 100. By this reason the transfer of energy to the Z-pinch plasma is essentially increased and a possibility of production of a plasma column with temperature 2-3 keV, concentration of heavy particles up to 1022cm-3 is opened for column length of some centimetres. It is planned a parallel conduction of experimental works and computer simulation of real experiments. The computer simulation is planed to provide on the basis of model developed by weapon specialists RFNC-VNIITF 2. The experiments will be conducted on GIT-4 installations (HCEI), ensuring the range of currents 0.4 - 1.6 MA at current increasing velocity from 1011up to 1013A/s. The diagnostic complex will be modernised on the basis of developed in Lebedev Institute a technique of laser testing of a dense plasma and modern X-ray spectroscopic methods.
During the work it is planned to decide the following problems:
1. To create a cylindrical current layer, homogeneous in z direction and j.
2. To create experimentally justified computational-theoretical model of instability development.
3. To suppress instabilities, arising at compression and heating of plasma column.
In the course of work it is intended to cooperate with Sandia National Laboratories (USA). Dr. D. McDaniel, Department manager (dep. 1273) of Sandia is a foreign collaborator in terms of the project. Dr. McDaniel is a well known expert on the problems associated with the use of z-pinches as radiation sources and in the physics of high-temperature dense plasmas. It is planned that Dr. McDaniel will participate in the design of detailed experiments, in the discussion of the results to be obtained, and in the relevant publications.
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