The name 'tandem' originates from this dual-use of the same high voltage, although tandems may also be named in the same style of conventional electrostatic accelerators based on the method of charging the terminal.
=== MP- Tandem van de Graaff accelerators ===
The MP- [[Tandem Van de Graaff|Tandem van de Graaff]] is a type of Tandem accelerator. Ten of these were built in the 20th century; six in North America<ref>{{Cite journal|last=Wegner|first=H.E.|last2=Thieberger|first2=P.|date=1977|title=North-American MP tandem accelerators|url=http://www.edpsciences.org/10.1051/rphysap:0197700120100129100|journal=Revue de Physique Appliquée|volume=12|issue=10|pages=1291–1301|doi=10.1051/rphysap:0197700120100129100|issn=0035-1687}}</ref> and four in Europe.<ref>{{Cite journal|last=Skorka|first=S.J.|date=1977|title=The European MP-Tandems|url=http://www.edpsciences.org/10.1051/rphysap:0197700120100127900|journal=Revue de Physique Appliquée|volume=12|issue=10|pages=1279–1290|doi=10.1051/rphysap:0197700120100127900|issn=0035-1687}}</ref>
<!-- want a long list of tandems before we promote a single laboratory An example of a tandem accelerator is [[ANTARES (accelerator)|ANTARES]] (Australian National Tandem Accelerator for Applied Research).-->
