Compatible operation of the power system for steady state and pulse modes in a magnetic torus KT-5D

Abstract

Articles you may be interested inDevelopment of a cross-polarization scattering system for the measurement of internal magnetic fluctuations in the DIII-D tokamaka) Rev. Sci. Instrum. 85, 11D838 (2014); 10.1063/1.4887276 Simulations of drift resistive ballooning L-mode turbulence in the edge plasma of the DIII-D tokamaka) Phys. Plasmas 20, 055906 (2013); 10.1063/1.4804638 Optimizing stability, transport, and divertor operation through plasma shaping for steady-state scenario development in DIII-Da) Phys. Plasmas 16, 056116 (2009); 10.1063/1.3125934Monte Carlo operators for ions interacting with radio frequency waves Compatible operation of steady state mode and pulse mode is realized in the KT-5D device. New power supplies with the operation control systems for the steady state toroidal magnetic field as well as for the vertical field are added, and the rf wave injection systems for sustaining steady state plasmas are upgraded. After the modification, the device now can work not only as a tokomak with pulsed plasma currents as it was but also as a simple magnetized torus with steady state plasma discharges. It allows more flexible and efficient experimental researches on the magnetically confined plasmas to be carried on in the same device.

A 57-Pin Langmuir Probe Array for Two-Dimensional Diagnosis in the Toroidal KT-5D Steady-State Plasma

“…The experiments were carried out in the KT-5D magnetic confinement toroidal device with a major radius of R 0 =32.5 cm, a miner radius of r=12.5 cm and a limiter radius of 9 cm. It can work in the steady-state SMT and helimak mode or in the pulsed tokamak mode [19] . In hydrogen SMT or helimak discharge, a direct current of 1200 A can provide a toroidal magnetic field B t of 1000 Gs at the center of the cross section of R = R 0 (or r=0 cm).…”

Preliminary Results of Drift Instability by Fast Optical Images in KT-5D Toroidal Plasma

“…KT-5D is a small double-functional magnetic confinement device, either as a tokamak [8] or as an SMT [9,10] , with a major radius R = 32.5 cm, a minor radius r = 12.5 cm, and a limiter radius of 9 cm. When the device works in the mode of a steady-state SMT, by feeding 1250 A into the coils, a constant DC current supply (0 ∼ 1500 A, 0 ∼ 80 V ) could generate a magnetic field of B T0 = B T (R 0 ) = 1000 Gauss on the axis R 0 at the center of its cross-section.…”

Investigation on the drives of the poloidal flow in the ohmic and biased electrode experiments

“…The experiments are conducted in the double functional device KT-5D. [23,24] In the pulse mode discharge, KT-5D is an ohmically heated small tokamak with a major radius of R = 32.5 cm, a minor radius of a = 12.5 cm, and a limiter radius of 9 cm. The coils can provide a toroidal field of up to 7000 Gauss with a maximal flattop time period of 8 ms.…”