An HID is an ion detector which uses a radioactive source to produce ions.

A DID is an ion detector which uses a high-voltage electric discharge to produce ions.

An ion detector is analogous to a capacitor or vacuum tube.

Some early FIDs actually used two metal grids as their ion detectors.

While some early efforts were made at detection, their signatures also explained inconsistent findings by ion detectors in regions of expected low ion populations.

Hence the electron multiplier is often used as an ion detector.

The first application of photoionization detection was as a gas chromatography (GC) ion detector.

No sudden blasts of acceleration that might set off their ion detectors.

We recommend these duplications: "A suprathermal ion detector to measure the mass and energy of any gases on or near the lunar surface.

Ion-electron velocity vector correlation functions can be obtained in double imaging setups, in which the ion detector also delivers position information.