IEEE TRANSACTIONS ON PLASMA SCIENCE, vol. 33, no. 2, page. 466 - 467, 2005-04
REVIEW OF SCIENTIFIC INSTRUMENTS, vol. 74, no. 3, page. 1621 - 1624, 2003-03
NUCLEAR FUSION, vol. 47, no. 11, page. L31 - L35, 2007-11
NATURE, vol. 494, no. 7435, page. 72 - 76, 2013-02-07
REVIEW OF SCIENTIFIC INSTRUMENTS, vol. 75, no. 10, page. 3787 - 3792, 2004-10