conversion dynode

https://doi.org/10.1351/goldbook.12372
Surface that is held at high potential so that ions striking the surface produce secondary charged particles that are subsequently detected.
Note: For positive ions, the potential is negative and the secondary particles are electrons and negative ions. For negative ions, the potential is positive and the secondary particles are positive ions.
Source:
PAC, 2013, 85, 1515. (Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)) on page 1533 [Terms] [Paper]