Fast sweeping probe system for characterization of spokes in E × B discharges
Abstract
We have developed a rapidly swept, back-to-back 100 kHz Langmuir probe system using a tunable compensating network to study the temporal evolution of low frequency oscillations in Penning discharges, Hall Thrusters, and other E × B discharges. Experimental validation of the probe system is performed at low and high sweeping frequencies in a stable Penning discharge. Then application of the probe system to measurements of plasma parameter fluctuations in a low frequency (4 kHz) rotating spoke and an analysis method using the Hilbert transform are shown. We find that the rotating spoke oscillation conducts approximately a third of the cross field current in our Penning device.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 01, 2018
- Source ID
- 10.1063/1.5053677
Entities
People
- Eduardo Rodríguez
- Pavel Dourbal
- Valentin Skoutnev
- Yevgeny Raitses
Organizations
- Air Force Office of Scientific Research
- Princeton University