Production of overdense plasmas by launching 2,45 GHz electron cyclotron   waves in a helical device
  For production of low temperature plasmas with low collisionality, 2.45GHz microwave power up to 20kW is injected perpendicularly to the toroidal field at very low toroidal field Bt 
Ryosuke Ikeda, Masaki Takeuchi, Takafumi Ito, Kazuo Toi, Chihiro   Suzuki, Go Matsunaga, Shoichi Okamura, Chs Group