K. W. Ehlers et al.; "Design and Operation of an Intense Neutral Beam Source" J. Vac. Sci. Technol. 10, 922-925 (1973). |
K. W. Ehlers and K. N. Leung; "Some Characteristics of Tungsten Filaments Operated as Cathodes in a Gas Discharge"; Rev. Sci. Instrum. 50, 356-361 (1979). |
United Kingdom Atomic Energy Authority Research Rpt., K. J. Hill et al., "The Harwell.RTM. Sputtered Ion Gun," Mar. 1970, p. 2, line 36; p. 3, line 8; p. 3, lines 28-32; FIG. 3. |
Nuclear Instruments and Methods, vol. 38, K. J. Hill et al., "A Sputtering Ion Source," Dec. 1965; p. 15, right-hand column, line 31; p. 17, left-hand column, line 1; FIG. 3. |
The Review of Scientific Instruments, vol. 30, No. 5, M. Abele et al., "Design and Performance of a Hot Cathode Magnetically Collimated Arc Discharge Ion Source," May 1959, p. 336, right-hand column, line 34; p. 337, left-hand column, line 2; p. 337, right-hand col., lines 14-25; FIG. 2. |