Hydrogen and helium recycling from a JxB-force convected liquid metal Ga67In20.5Sn12.5 under steady state plasma bombardment

A series of first-of-a-kind laboratory-scale experiments on the JxB-force convected liquid metal divertor concept have been carried out in the temperature range from room temperature to ∼200 °C, employing a eutectic alloy: Ga67In20.5Sn12.5, the melting point of which is 10.5 °C. The electrical current conducted through the alloy is set at about 70A and the magnetic field is set at about 700 G. It has reproducibly been observed that hydrogen as well as helium particle recycling is noticeably reduced under steady state plasma bombardment when the liquid is convected by the JxB force

マイクロハ デンパ キュウシュウザイ ノ キソ トクセイ

多層形電波吸収材に良く知られている伝送線路理論を適用し,マイクロ波帯において反射係数と透過減衰量(線路理論における動作減衰量に等しい)を計算し実測値と比較検討した。その結果両者は比較的良く一致すること,又整合特性の良い電波吸収材の透過減衰量は減衰定数から得られる減衰量を用いて実用上差支えないことが判明した。ただし本論文では電波の垂直入射の場合のみを取扱う

Steady state hydrogen, deuterium, helium and argon plasma interactions with a liquid metal: Ga67In20.5Sn12.5 convected by Lorentz force

Steady state hydrogen, deuterium and helium plasma interactions with a liquid metal: Ga67In20.5Sn12.5 at termperatures between room temperature and ∼250°C have been investigated with JxB-forced convection, using a laboratory-scale facility: VEHICLE-1. Noticeably reduced recycling has been observed for all these gases, when JxB-forced convection is applied, under respevtive plasma bombardment. Preliminary fluid dynamics modeling has been done to interpret experimental observations. For hydrogenic species, a trend has been found, indicating temperature-dependent retention saturation levels. With thermal desorption spectrometry, the amount of deuterium retention after saturation at ∼250°C has been evaluated to be of the order of 1014D/cm3 whereas the retention of inert gases is found to be undetectable