A high-flux-density hollow cathode plasma source for the studies on plasma surface interactions

Jin, Wei; Liang, Chang-Min; Xu, Haiyan; Gou, Fujun; Ma, Xiaochun; Wang, Dongping; Chen, Changan; Kleijn, A.W.

doi:10.1016/j.fusengdes.2017.04.127

Cited by 4 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the secondary circuit was triggered, a high-intensity pulse could be observed through the chamber view-ports as shown in figure 2. The hollow target electrode [23] is on the left of each frame. The change in intensity during the pulses is attributed to a substantial increase in plasma temperature.…”

Section: A Plasma Beam In a Linear Devicementioning

confidence: 99%

A pulsed high-current plasma beam under external and self-induced magnetic confinement in a linear device

Zheng¹,

Gou

Zhou

et al. 2019

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

The previously developed governing equations for Magnetic Inertial Confinement Fusion, which combines the advantages of both magnetic and inertial confinement approaches, are improved to analyse a plasma beam in a linear device assisted by an external magnetic field. The equations are applied to simulate a steady state plasma beam sustained by a DC power supply as well as a transient beam generated by a separate pulsed discharge superimposed on the steady-state plasma. The calculated increase of plasma density during the pulse from the steady-state condition is compared with measurements using a laser interferometer at a relatively low voltage supply of 150 V for the pulses. The numerical and test results are found to agree within 20%. When the voltage rises, plasma instability is observed. This issue is inherent due to the use of a solid positive target electrode that blocks the plasma flow in the axial direction. As a remedy, additional tests were carried out using a hollow target electrode in a two-circuit design (to permit free gas flow in the axial direction) by replacing the DC power with transient, pulsed, highvoltage sources for plasma initiation and beam formation. These enhancements were successful in suppressing the instabilities. The peak plasma density was calculated at ∼10 22 m −3 for confinement times of the order of 1 ms. These results lie between the extremes for the current leading approaches yet are achieved for a more compact and inexpensive linear device.

show abstract

Section: A Plasma Beam In a Linear Devicementioning

confidence: 99%