Gas puffing by molecular beam injection in Aditya tokamak

Supersonic Gas Injection Fuelling in Tokamaks

“…Figure 5: Piezoelectric valve for SGI fuelling [9] Experiment was done to check the rising electron density, change in temperature, potential fluctuations in the Edge plasma with different pulse width and different number of pulses. (a) For two pulses of gas at 42 and 54 ms of 2.5 and 1.5 ms pulse width density rise rate d(n e )/dt for MBI is found to be ∼3.…”

Flow characterization of supersonic gas jets: Experiments and Simulations

“…Supersonic jets have found applications in plasma diagnostics in Tokamaks TJ-II [1], TEXTOR (now decommissioned) [2] and also used for fuelling [3,4]. Furthermore, they are also used as gas puffing sources in laser cluster interactions [5] and Z-pinch experiments [6].…”

“…Figure 1: Typical Mach cell structure depicating an underexpanded supersonic jet in partial vacuum[4] …”

“…4 ) ∆P 0 mbar(He) ∆P 0 mbar(N 2 ) Operating conditions for transducer experiments: ∆P represents the pressure rise after pulse.…”

Design of Nozzles for Supersonic Gas Injector Prototype

“…It is economical to develop and to maintain. This method has been tested around the world in many fusion reactor tokamaks by researchers for example, NSTX [3,4] , Tore Supra [5] , KSTAR [6] , HL-1M [7,8] , ADITYA [9] etc. After many experiments they have concluded that Supersonic molecular beam injection (SMBI) is suitable for small and medium sized tokamaks.…”