Commissioning and experimental validation of SST-1 plasma facing components

10th Asia Plasma and Fusion Association Conference

Paravastu, Yuvakiran^1 ; Raval, Dilip^1 ; Khan, Ziauddin^1 ; Patel, Hitesh^1 ; Biswas, Prabal^1 ; Parekh, Tejas^1 ; George, Siju^1 ; Santra, Prosenjit^1 ; Ramesh, Gattu^1 ; Arunprakash, A.^1 ; Thankey, Prashant^1 ; Semwal, Pratibha^1 ; Dhanani, Kalpeshkumar R.^1 ; Jaiswal, Snehal^1 ; Chauhan, Pradeep^1 ; Pradhan, Subrata^1

Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar

382 428, India^1

关键词: Auxiliary heating;    Experimental validations;    Plasma facing materials;    Plasma operations;    Plasma particles;    Plasma-facing components;    Radiative heat loads;    Wall conditioning;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/823/1/012062/pdf
DOI  :  10.1088/1742-6596/823/1/012062

来源: IOP

【 摘 要 】

Plasma facing components of SST-1 are designed to withstand an input heat load of 1.0 MW/m2. They protect vacuum vessel, auxiliary heating source i.e. RF antennas, NBI and other in-vessel diagnostic from the plasma particles and high radiative heat loads. PFC's are positioned symmetric to mid-plane to accommodate with circular, single and double null configuration. Graphite is used as plasma facing material, back made of copper alloy and SS cooling/baking tubes are brazed on copper alloy back plates for efficient heat removal of incident heat flux. Benchmarking of PFC assembly was first carried out in prototype vacuum vessel of SST-1 to develop understanding and methodology of co-ordinate measurements. Based on such hands-on-experience, the final assembly of PFC's in vacuum vessel of SST-1 was carried out. Initially, PFC's are to be baked at 250 °C for wall conditioning followed with cooling for heat removal of incident heat flux during long pulse plasma operation. For this purpose, the supply and return headers are designed and installed inside the vacuum vessel in such a way that it will cater water as well as hot nitrogen gas depending up on the cycle. This paper will discuss the successful installation of PFC's and its plasma operation respecting all design criteria.