Typical laboratory setup of an ARPES experiment: Helium discharge lamp as an ultraviolet source, sample holder attached to a vacuum manipulator, electron energy analyzer.
<a href="//commons.wikimedia.org/wiki/User:Ponor" title="User:Ponor">Ponor</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>