Editing Ion source (section)

===Spark ionization===
{{Main|spark ionization}}
Electric spark ionization is used to produce gas phase [[ion]]s from a solid sample. When incorporated with a mass spectrometer the complete instrument is referred to as a spark ionization mass spectrometer or as a spark source mass spectrometer (SSMS).<ref>{{cite journal |author1=H. E. Beske |author2=A. Hurrle |author3=K. P. Jochum | title = Part I. Principles of spark source mass spectrometry (SSMS) | date = 1981 | journal = [[Fresenius' Journal of Analytical Chemistry]] | volume = 309 | issue = 4 | pages = 258–261 | doi = 10.1007/BF00488596|s2cid=92433014 }}</ref>

A closed drift ion source uses a radial magnetic field in an annular cavity in order to confine electrons for ionizing a gas. They are used for [[ion implantation]] and for space propulsion ([[Hall-effect thruster]]s).