<RESEARCH REPORT>End Pluggings of a Linear Theta Pinch by Hot High Z Plasmas of High Mass Number

概要

論文の詳細を見る
End plugging of a θ-pinch by high temperature plasma of high mass number is proposed. Using two different simplified models, thermal insulation mode (TIM) and free expansion mode (FXM), characteristic parameters interested in CTR reactor are calculated. The TIM claims that the energy is lost through the electron thermal conduction, whereas in the FXM the plasma energy is carried out with the plasma flowing along the magnetic field line. In the TIM the thermal insulation is improved due to the high Z number of plugging plasmas. In the FXM inertia of the high mass ions contribute to reduce the plasma expansion speed along it. It is estimated that the plugging proposed in this paper will save the system length by factor 3∿5 compared with the one without any plugging. A typical example of the length of the system will be 68m for the Lawson criterion experiment under the operation of 200kG. The energy required for the plugging is calculated to be 4.9×10^<-2> Z_<eff>^<-1/2>(nτ_E)^<1/2_T9/4>(πb^2) for TIM and 8.8×10^<-6>. ημ^<-1/2>T^<-3/2>(nτ_E) (πb^2) for FXM, where η is the throttling coefficient of about 2.5 and b is inner radius of the coil. For Lawson experiment magnetic energy of 92 MJ will be enough if the coil and the plasma radius is 6 and 3 cm, respectively.
核融合科学研究所の論文