title: Development of a compact permanent magnet helicon plasma source for ion beam bioengineering.
abstract: A compact helicon plasma source was developed as a millimeter-sized ion source for ion beam bioengineering. By employing a stacked arrangement of annular-shaped permanent magnets, a uniform axial magnetic flux density up to 2.8 kG was obtained. A cost effective 118 MHz RF generator was built for adjusting forward output power from 0 to 40 W. The load impedance and matching network were then analyzed. A single loop antenna and circuit matching elements were placed on a compact printed circuit board for 50 Ω impedance matching. A plasma density up to 1.1 × 10(12) cm(-3) in the 10 mm diameter tube under the magnetic flux density was achieved with 35 W applied RF power.
authors: Plasma Technology for Agricultural Applications Research Laboratory, School of Science, Walailak University, Nakhon Si Thammarat 80161, Thailand. pansak20@hotmail.com
authors: P
authors: P
authors: Kerdtongmee
authors: D
authors: D
authors: Srinoum
authors: M
authors: M
authors: Nisoa
mesh_terms: D057005:Bioengineering / Q000295:instrumentation* / Q000379:methods; D007477:Ions; D008280:Magnetics / Q000295:instrumentation* / Q000379:methods
chemical_list: D007477:Ions