Penning gauge
(US Penning gage) Physics
noun
An ionization gauge with an unheated cathode in which a magnetic field is applied to increase the number of ions produced.
Origin
1950s; earliest use found in Journal of Scientific Instruments. Described by Penning, in Physica 4 71.
- let in (or out) the clutch
- let it all hang out
- let it be (or make something) known
- let me see
- let me see (or think)
- let me tell you
- Leto
- let-off
- let off steam
- let on
- let oneself go
- let oneself in for
- let one's hair down
- let (or blow) off steam
- let out
- let-out clause
- let rip
- let's
- let's face it (or let's be honest)
- let sleeping dogs lie
- let slip
- let someone down
- let someone down gently
- let someone have it
- let someone in