TY - GEN AU - Pandey,Arun AU - Bandyopadhyay,M AU - Sudhir,Dass AU - Chakraborty,A TI - Performance evaluation of a permanent ring magnet based helicon plasma source for negative ion source research SN - 1089-7623 PY - 2018///0205 N1 - Publication Type: Journal Article UR - https://doi.org/10.1063/1.4994058 ER -