A simulation study of a windowless gas-stripping room in an E//B neutral particle analyzer

The neutral particle analyzer (NPA) is one of the crucial diagnostic devices in a Tokamak facility. stripping unit main parts NPA. A windowless gas-stripping room with two differential pipes has been constructed parallel electric and magnetic fields (E//B) pressure distributions chamber are simulated by ANSYS Fluent together MolFlow+. Based on obtained from simulation, efficiency E//B NPA studied using GEANT4. Hadron reaction physics modified to track charge state each cross-section-based method transmission rates (R) efficiencies $$f_{+1}$$ examined for energies ranging 20 200 keV input ( $$P_0$$ ), 400 Pa. According combined global efficiency, $$R \times f_{+1}$$ , = 240 Pa as optimum maximum incident energy range investigated.