gridless reflectron

https://doi.org/10.1351/goldbook.12423
Reflectron design in which the decelerating/accelerating field is produced without the use of wire-mesh grids.
Note: This design improves ion transmission but at the cost of a less homogeneous field and thus reduced resolution.
Source:
PAC, 2013, 85, 1515. (Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)) on page 1547 [Terms] [Paper]