The design of Multiple Plasma Simulation Linear Device

Abstract

• The physical design of a plasma linear device called M ultiple P lasma S imulation L inear D evice (MPS-LD) at Dalian University of Technology is presented. • MPS-LD is characterized by replaceable plasma source, plasma auxiliary heating system and flexible target room. • The objective of MPS-LD is to provide the plasma environment to investigate the plasma-material interactions and divertor plasma physics. • The design of a linear plasma device called M ultiple P lasma S imulation L inear D evice (MPS-LD) at Dalian University of Technology is presented. The objective of MPS-LD is to investigate the key scientific issues in tokamaks, i.e. plasma-material interactions and the divertor plasma physics. The distinctive features of MPS-LD are the replaceable plasma sources, the capability of plasma heating and flexible target room. The length of the vacuum chamber is 3 m, and the device consists of two sizes of chambers with diameters of 0.4 m and 0.6 m, respectively. The steady-state magnetic field with maximum strength at axis of 0.3 Tesla (T) is generated by 11 conventional copper magnets, including 8 small coils and 3 big coils. The device is divided into three regions: plasma source region, auxiliary heating region and target region. Initially, the helicon wave plasma source will be installed to produce the plasma with density of 10 18 -10 19 m -3 , and temperature of 1-3 eV. The arrange of magnets and the magnetic field distribution are computed by the finite element method, and the required pumping system for the desired neutral pressure is calculated by the pressure balance method. The design of magnet system, three-stage differentially pumped vacuum system, replaceable plasma sources, cooling circulation system, target chamber system, diagnostic system and auxiliary heating system, are presented in this work.