Author: G. T. A. HuysmansPublisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 3
Book Description
MHD stability analysis of high-#beta# JET discharges
Author: G. T. A. HuysmansPublisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 3
Book Description
MHD Stability Analysis of High-B JET Discharges
Author: G. T. A. HuysmansPublisher:
ISBN:
Category : Plasma stability
Languages : en
Pages : 8
Book Description
MHD Analysis of High (. Beta
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
PBX discharges run at the lowest q and highest (.beta./sub t/) always terminated in a hard disruption. The discharges, with (.beta./sub t/) values of up to 5.5% and q-values down to 2.2, were obtained by employing large current ramps and large gas feed rates during neutral beam injection. Previous work has indicated that the achieved (.beta./sub t/)-values were consistent with the limit imposed by the n = 1 ideal external kink with a conducting wall at b/a = 2. In this work, we investigate further the validity of ideal MHD theory in explaining the low-q/sub psi/j disruptions. In particular, the character of the pre-disruption MHD activity in these low-q discharges, specifically the time scales of growth and internal and external mode structures, was compared with those determined from theoretical calculations. The results of these comparisons indicate that non-ideal effects must be considered to obtain detailed agreement between theory and experiment. 13 refs., 6 figs.
High Beta and Second Stability Region Transport and Stability Analysis
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 38
Book Description
This document describes ideal and resistive MHD studies of high-beta plasmas and of the second stability region. Significant progress is reported on the resistive stability properties of high beta poloidal supershot'' discharges. For these studies initial profiles were taken from the TRANSP code which is used extensively to analyze experimental data. When an ad hoc method of removing the finite pressure stabilization of tearing modes is implemented it is shown that there is substantial agreement between MHD stability computation and experiment. In particular, the mode structures observed experimentally are consistent with the predictions of the resistive MHD model. We also report on resistive stability near the transition to the second region in TFTR. Tearing modes associated with a nearby infernal mode may explain the increase in MHD activity seen in high beta supershots and which impede the realization of Q(approximately)1. We also report on a collaborative study with PPPL involving sawtooth stabilization with ICRF.
Stability Analysis of High Beta Plasmas in JET
Author: Ohjin J. KwonPublisher:
ISBN:
Category : Nuclear fusion
Languages : en
Pages : 13
Book Description
Low-N Ideal and Resistive MHD Stability of JET Discharges
Author: G. T. A. HuysmansMHD Stability of JET High Performance Discharges
Author: G. T. A. HuysmansPublisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages :
Book Description
MHD Analysis of High (beta T) Disruptions in PBX.
Author: M. S. ChancePublisher:
ISBN:
Category : Magnetohydrodynamic instabilities
Languages : en
Pages : 22
Book Description
Author: S. Saarelma
Author: