direct exposure probe

acronym: DEP
https://doi.org/10.1351/goldbook.12391
Device based on a modification of a direct insertion probe for exposing an involatile sample directly to the electron beam (in an electron ionization source) or to a chemical ionization plasma as in desorption chemical ionization.
Note: The sample can be deposited on an inert surface or on a heater filament for rapid heating.
Source:
PAC, 2013, 85, 1515. (Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)) on page 1537 [Terms] [Paper]