Measurement of transient neutral gas puff pressure in the NUDT_IPPTx by a fast ionization gauge

A gas injector was designed for the 400 J/pulse prototype of the planar inductive pulsed plasma thruster (IPPT) developed by the National University of Defense Technology (NUDT_IPPTx). As the gas puff distribution over the coil surface is critical to the NUDT_IPPTx functioning efficiently, a fast io...

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Bibliographic Details
Published in:Plasma science & technology 2018-12, Vol.20 (12), p.125506
Main Authors: GUO, Dawei, CHENG, Mousen, LI, Xiaokang, CHE, Bixuan, YANG, Xiong, WANG, Moge
Format: Article
Language:English
Subjects:
fast ionization gauge
fast pulsed valve
gas injection
inductive pulsed plasma thruster
neutral gas pressure
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Summary:A gas injector was designed for the 400 J/pulse prototype of the planar inductive pulsed plasma thruster (IPPT) developed by the National University of Defense Technology (NUDT_IPPTx). As the gas puff distribution over the coil surface is critical to the NUDT_IPPTx functioning efficiently, a fast ionization gauge was developed to investigate the neutral gas pressure profiles to seek the critical time when the thruster is ignited. The gauge was calibrated for argon by using a capacitance manometer. Time-resolved pressure profiles have been acquired in the condition of the gas puff mass matching with the discharge energy and the drive coil parameters of the NUDT_IPPTx. It is demonstrated that the gas injector can supply a gas puff with a sufficiently steep (dp/dt 770 kPa s−1) leading and trailing edge, and the gas puff can be compressed against the drive coil as expected. The critical ignition moment is considered to appear at some instant between 525 s and 650 s after the valve trigger.
ISSN:1009-0630
1009-0630
DOI:10.1088/2058-6272/aade84