Empirical scaling laws and extrapolation to Helias reactors

Empirical scalings of energy confinement are used to predict ignition parameters in a Helias reactor. These scaling laws are: Lackner-Gottardi scaling (LGS), international stellarator scaling (ISS95) and international stellarator scaling with W-7 data only (ISS95_W_7). For comparison, tokamak scaling laws (ITER89 and ELMYH92y) are also taken into account. The results show that ISS95 yields a confinement time which is too small forignition. LGS and ISS95_W_7, however, are sufficient for ignition. An isotope factor or any improvement by H-mode confinement are not taken intoaccount. The Helias reactor (HSR, R = 22 m, a = 1.8 m, B = 4.75 T. left angle #beta# right angle = 4.4%, P_f_u_s = 3040 MW) requires a confinement time #tau#_E = 1.7 s. (orig.)Available from TIB Hannover: RA 71(2/338) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman