MAGO- System for Fusion
Studying the Feasibility to Solve the CTF Problem on MAGO System Base.
Tech Area / Field
- FUS-MCS/Magnetic Confinement Systems/Fusion
8 Project completed
Senior Project Manager
Lapidus O V
VNIIEF, Russia, N. Novgorod reg., Sarov
- Los-Alamos National Laboratory, USA, NM, Los-Alamos
Project summaryEfforts of most world laboratories in solving the CTF problem are mainly directed to studying two physical system types: stationary systems where thermal insulation of low-density hot plasma and its confinement is realized using magnetic fields, and inertial confinement systems where DT-plasma is rather rapidly compressed up to high densities.
In 1976-1979 at VNIIEF the feasibility was considered to solve the CTF problem on the base of the magnetic implosion non-stationary system (MAGO). In the MAGO system such experiments can be carried out using comparatively cheap explosive magnetic generators (EMG) whose production in well mastered at VNIIEF, The principal difficulty with achieving ignition in the MAGO system Is production of heated magnetized plasma with low content of heavy copper ion admixtures which can get in plasma from chamber walls. Joint works which are currently underway at VNIIEF and LANL are intended to solve this problem.
Joint theoretical computational and experimental development of MAGO system begun in LANL and VNIIEF in 1993. (In the USA this concept is known as Magnetized Target Fusion or MTF) Possibility of magnetized plasma preliminary heating up 0.2-3 keV has been studied in the experiments made. Experimental results are in good agreement with computations made by VNIIEF and LANL and inspire hope of the thermonuclear ignition achievement by subsequent compression with help of a liner of the DT-gas preheated in the MAGO chamber. Liner is supposed to be energized by high energy EMG developed in VNIIEF. First joint VNIIEF-LANL experiment on acceleration of a liner with EMG able to produce up to 100 MJ will be held in middle of 1996 according to the plan of the laboratories' collaboration . Further on the program program of VNIIEF-LANL collaboration on investigation of thermonuclear ignition achievement of the DT-gas preheated in the MAGO chamber is supposed to be continued under this contract with the ISTC. Imminent feature of this project is ability to realize full-scale experiments up to the ignition with help of EMG without involvement of expensive stationary facilities. Stationary energy storages building now, like "Atlas" (LANL) and "Jupiter" (Sandia), could be required on the stage of thermonuclear power plant development.
The suggested work involves theoretic-computational and experimental research of plasma compression by a liner and bringing plasma characteristics to the values corresponding to thermonuclear reaction ignition (the Lawson criterion).
As computations show, in the system under consideration the Lawson criterion can be achieved if the initial pressure of DT-gas in the plasma chamber is taken to be-10-20 Torr and plasma heated up to kiloelectronvolt temperature is compressed by a factor 100 through 200 at ~106 cm/s compression rate. The compressed plasma parameters needed for a target to ignite are as follows: density ~10-20 cm-3, characteristic size ~l-2 cm, characteristic confinement time ~10-6s, total energy in a compressed plasma volume -10-20 MJ, magnetic field -5-10 MOe, plasma temperature -10-15 keV. We expect these parameters to be achieved during compression. Designing a target with DT-plasma heating would allow to reduce requirements for Ihe liner system implosion rate (from (2-3)-107 cm/s to ~106 cm/s), for DT-plasma implosion degree (from ~103 to ~102) and for system compression symmetry.
The project participants have profound experience gained at development of special equipment in the field of high energy density physics, strong magnetic fields, fast process recording and are able to apply their knowledge and experience to solution of the project problems.
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