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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (12): 125506-125506.doi: 10.1088/2058-6272/aade84

• 等离子体技术 • 上一篇    下一篇

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

  

  • 收稿日期:2018-06-25 出版日期:2018-10-09 发布日期:2018-09-03

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

Dawei GUO (郭大伟), Mousen CHENG (程谋森), Xiaokang LI (李小康) , Bixuan CHE (车碧轩), Xiong YANG (杨雄) and Moge WANG (王墨戈)   

  1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, People’s Republic of China
  • Received:2018-06-25 Online:2018-10-09 Published:2018-09-03
  • Supported by:

    This work is supported by National Natural Science Foundation of China (No. 51306203), and the Natural Science Foundation of Hunan Province (No. 2018JJ3592).

Abstract:

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 μs and 650μs after the valve trigger.

Key words: inductive pulsed plasma thruster, gas injection, fast ionization gauge, fast pulsed valve, neutral gas pressure

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