A coil assembly for generating plasma, is disclosed. The coil assembly includes a cylindrical coil having a cylindrical inner mesh, a cylindrical outer mesh and a cylindrical dielectric separating the inner and outer meshes, an insulating stand at each of the first and second end of the cylindrical coil configured for mounting the cylindrical coil in an elevated position, wherein supply of voltage to the inner and outer meshes generates plasma which is discharged from the outer mesh.
