Evolution of the mirror machine
The history of the magnetic-mirror approach to a fusion reactor is primarily the history of our understanding and control of several crucial physics issues, coupled with progress in the technology of heating and confining a reacting plasma. The basic requirement of an MHD-stable plasma equilibrium was achieved following the early introduction of minimum-B multipolar magnetic fields. In refined form, the same magnetic-well principle carries over to our present experiments and to reactor designs. The higher frequency microinstabilities, arising from the non-Maxwellian particle distributions inherent in mirror machines, have gradually come under control as theoretical prescriptions for distribution functions have been applied in the experiments. Even with stability, the classical plasma leakage through the mirrors posed a serious question for reactor viability until the principle of electrostatic axial stoppering was applied in the tandem mirror configuration. Experiments to test this principle successfully demonstrated the substantial improvement in confinement predicted. Concurrent with advances in mirror plasma physics, development of both high-power neutral beam injectors and high-speed vacuum pumping techniques has played a crucial role in ongoing experiments. Together with superconducting magnets, cryogenic pumping, and high-power radiofrequency heating, these technologies have evolved to a level that extrapolates readily to meet the requirements of a tandem mirror fusion reactor.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5734304
- Report Number(s):
- UCRL-89277; CONF-831171-1; ON: DE83016942
- Resource Relation:
- Conference: American Vacuum Society meeting, Boston, MA, USA, 1 Nov 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MAGNETIC MIRRORS
REVIEWS
PLASMA CONFINEMENT
PLASMA MICROINSTABILITIES
THERMAL BARRIERS
TMX DEVICES
CONFINEMENT
DOCUMENT TYPES
INSTABILITY
OPEN PLASMA DEVICES
PLASMA INSTABILITY
TANDEM MIRRORS
THERMONUCLEAR DEVICES
700200* - Fusion Energy- Fusion Power Plant Technology