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One of the fundamental problems is the understanding of physics ofelectrostatic and electromagnetic fluctuations in multi-scale plasmaturbulence. Especially so, in continuously connected plasma regions withvarying degree of magnetization. Examples range from multiscale plasmas inMagnetron-like devices to astrophysical plasmas confined by magnetic dipolestructures, solar wind driven collision-less and weakly collisional plasmasaround Earth, to mention a few. Such plasmas are dominated by both electronscale and ion scale physics as well as finite beta effects. To investigate suchprocesses in laboratory experiments requires excellent control of continuouslyconnected regions of nearly zero plasma beta with finite beta regions as wellas the gradient length scales of mean density and temperatures. To address someof these phenomena at laboratory scale, a new multi-line cusp configured plasmadevice (MPD) consisting of electromagnets with core material has beenconstructed with a capability to experimentally control the relative volumefractions of magnetized to unmagntized plasma volume as well as accuratecontrol on the gradient length scales of mean density and temperature profiles.The hot tungsten cathode produced Argon plasma in the MPD has beencharacterised using single Langmuir probes. Argon plasma has been produced inthe device over a wide range of pressure 5 x 10-5 mBar to 1 x 10-3 mBar,achieving plasma density range from 109 to 1011cm-3 and temperature in therange 1eV to 8eV.

A new multi line-cusp magnetic field plasma device (MPD) with variable magnetic field for fundamental plasma studies