李永东

Date:

2025-04-30

Title of Paper:

A volume-weighting cloud-in-cell model for simulation of axial symmetrical plasmas

Journal:

Plasma Science & Technology

Summary:

In particle-in-cell (PIC) simulation, all cases of particle displacement in discrete grid are
generalized as an internal-one-cell case. Based on the generalized case, we develop a volume-weighting
cloud-in-cell (VW-CIC) model to couple fields and particles. This model is first-order accurate in cylindrical
systems, and it is incorporated in a PIC code. A planar diode with finite-radius circular emitter is simulated
with the code. The results show that the VW-CIC model is more accurate and lower noisy than the
conventional area-weighting cloud-in-cell (AW-CIC) model, especially on those points near the axis, and the
two-dimensional (2-D) space-charge-limited current density obtained from VW-CIC model is in better
agreement with Lau’s theory prediction. This model can be used in 2.5-D PIC simulation of axial symmetrical plasmas

Co-author:

LI Yongdong, HE Feng, LIU Chunliang

Volume:

7(1)

Page Number:

2653–2656

Translation or Not:

No

Date of Publication:

2005-02-01