Cusped Mirror Magnetic Field for Electron Cyclotron Resonance Heavy Ion Source

Sufficient beams of Highly Charged Heavy Ions (HCHI) have been obtained in conventional electron cyclotron resonance ion sources (ECRIS) but at the cost of simplicity and economy. A cusped magnetic field (CMF) has more plasma-confining feature but a little current of HCHI’s was extracted from ECRIS using it. The CMF has been reconfigured adopting a simple, novel and cost-effective technique. It uses a pair of coaxial coils either normal conducting or super-conducting, a mid-iron disk (MID) and properly shaped plugs. It can be designed now for higher microwave frequencies for high-B mode operation of the cusp ECRIS. The CMF, so created at the cusp positions is referred to a theory of equilibrium, which takes into account mirror reflection of charged particles. An ion source using the field configuration can be used to obtain stable or radioactive ion beam of high charge state. A simple design of 14.4 (18.0) GHz cusped mirror ECRIS and electron simulation in the field is presented herein for developing the compact, costeffective and robust source of future.