Plasma cell for providing VUV filtering in a laser-sustained plasma light source

A plasma cell comprising:

• a plasma bulb configured to contain a gas suitable for generating a plasma, the bulb being substantially transparent to light emanating from a pump laser configured to sustain a plasma within the plasma bulb, wherein the plasma bulb is substantially transparent to at least a portion of a collectable spectral region of illumination emitted by the plasma;
• a liquid inlet arranged at a first portion of the plasma bulb;
• and
• a liquid outlet arranged at a second portion of the plasma bulb opposite the first portion of the plasma bulb, the liquid inlet and the liquid outlet configured to flow a liquid from the liquid inlet to the liquid outlet, the liquid configured to block a selected spectral region of the illumination emitted by the plasma;
• and
• an actuation assembly configured to at least partially rotate the plasma bulb in order to distribute the liquid about at least a portion of the interior surface of the plasma bulb.