2-FLUID ANALYSIS OF DIMENSIONALLY SIMILAR DISCHARGES

Authors
Citation
Tc. Luce et Cc. Petty, 2-FLUID ANALYSIS OF DIMENSIONALLY SIMILAR DISCHARGES, Physica scripta. T, 52(4), 1995, pp. 444-448
Citations number
10
Categorie Soggetti
Physics
Journal title
ISSN journal
02811847
Volume
52
Issue
4
Year of publication
1995
Pages
444 - 448
Database
ISI
SICI code
0281-1847(1995)52:4<444:2AODSD>2.0.ZU;2-M
Abstract
The concept of dimensionless scaling introduces the possibility of det ermining the required size for a fusion reactor based on data from a s ingle machine. Specifically, all dimensionless quantities other than t he normalized gyroradius rho can be simultaneously matched to reactor values in present-day tokamaks. Experiments on DIII-D show that the e lectrons and ions have distinct rho scalings - for electrons chi prop ortional to rho, while chi proportional to rho*(-1/2) for ions. This observation can unify previous results based on single-fluid analysis, and, in addition, illustrates the danger of using such analysis to ex trapolate to a reactor. The rho scaling, coupled with technological l imits on the magnetic field strength, determines the minimum size for a reactor. If these rho scalings found on DIII-D hold under reactor-r elevant conditions, the confinement will scale unfavorably as rho is reduced to the values expected in a reactor.