Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wall Ion Loss Reduction by Acceleration Zone Shifting in Anode-Layer
  Hall Thruster   In this study, wall ion loss and erosion rate are evaluated in the RAIJIN
thruster. The novelty of this work is the detailed analysis of measured
guard-ring (metallic channel wall) current, which enables a fast evaluation of
the wall ion loss and erosion rate. The current-voltage characteristics of the
guard-ring current indicate that the sheath on the guard rings is in the ion
saturation regime and that the guard-ring current can be used as a wall ion
flux indicator. The experimental results demonstrate that the wall ion loss can
be significantly reduced in the magnetic configuration of RAIJIN thrusters with
the acceleration zone shifting.

14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph