Experimental research on influence of gas adsorption on secondary electron emission of copper surface

Zhang, Na; Fang, Wanliang; Cao, Meng; Cui, Wanzhao

doi:10.1016/j.micron.2020.103009

Cited by 4 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since no work has been reported for studying the effect of the adsorbed air on the emission coefficient of δ-SE from Mo, we turn to other metals. Investigations demonstrate that the air adsorption leads to a large increment in the emission coefficient of δ-SE [58,59]. Based on these results, we can conclude that the reduction of P wb in the adsorbed-air case is a result of the rise in the emission coefficient of δ-SE.…”

Section: Ecr Breakdown Excited By Mo Antenna Exposed To Airmentioning

confidence: 68%

Effects of gas adsorbed on solid surface during gas breakdown in electron cyclotron resonance discharges

Fu¹,

Ding²

2021

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

The microwave breakdown power (Pwb) in an ECR plasma source was not merely determined by pressure (gas flow rate), but found to vary with the time interval between two successive breakdowns. The measured Pwb dropped rapidly from a high value at a short time interval to a low level at a long time interval. The obtained dependence of Pwb on pressure (gas flow rate) exhibited distinct features: the normal monotonicity and abnormal non-monotonicity at the short and long time intervals, respectively. The effective zone in the antenna’s surface bombarded by hot electrons heated in the ECR layer was validated by (1) masking the antenna with a film having a variable radius; (2) calculating the distribution of the vertical component of the microwave electric field with respect to the static magnetic field; (3) imaging glows of transient breakdown discharges with a fast camera. The reduction in Pwb was mainly attributed to the enhanced emission of δ-electrons from the gas-adsorbed antenna under the bombardment of energetic electrons coming from the ECR layer.. The correlation between the dynamic gas coverage and the coefficient emission of δ-electrons was established to understand the abnormal ECR breakdown features.

show abstract

Section: Ecr Breakdown Excited By Mo Antenna Exposed To Airmentioning

confidence: 68%

Effects of gas adsorbed on solid surface during gas breakdown in electron cyclotron resonance discharges

Fu¹,

Ding²

2021

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Current methods for suppressing secondary electron emission from surfaces include surface conformation and coating modifications [24][25][26]. The surface configuration approach usually achieves a reduction in secondary electron yield by constructing a surface trap structure and using the shielding effect of the microstructure to limit the emission of secondary electrons [27].…”

Section: Introductionmentioning

confidence: 99%

Gas Desorption and Secondary Electron Emission from Graphene Coated Copper Due to E-Beam Stimulation

Feng

Song

et al. 2023

Coatings

View full text Add to dashboard Cite

The gas desorption and secondary electron multiplication induced by electron bombardment tend to induce severe low-pressure discharge effects in space microwave device cavities. Nevertheless, few studies have focused on both secondary electron emission and electron-stimulated gas desorption (ESD). Although the suppression of secondary electrons by graphene was found to be better in our previous study, it is still unclear whether the surface modification of graphene, which brings about different interfacial states, can also be manifested in terms of ESD. The deep mechanism of gas desorption and secondary electron emission from this extremely thin two-dimensional material under electron bombardment still needs further investigation. Therefore, this paper investigates the mechanism of graphene modification on Cu metal surface on the gas release and secondary electron emission properties under electron bombardment. The surface states of graphene-modified Cu were characterized, and the ESD yield and secondary electron yield of Cu/GoCu were investigated using a self-researched platform and analyzed using molecular dynamics simulations and electron Monte Carlo simulations. The results of the study showed that the most released component on the Cu surface under the bombardment of electrons was H2O molecules, while the most released component on the GoCu surface was H2 molecules. The graphene-modified samples showed a significant suppression effect on the secondary electron yield and ESD only in the low-energy region below 400 eV. This study can provide a valuable reference for suppressing low-pressure discharge and multipactor phenomena in space microwave components.

show abstract

Rolling temperature effects on linear current range of secondary electron emission properties of an activated Cu–3.0Be alloy

Zou,

Zhu,

Ding

et al. 2025

Materials Characterization

View full text Add to dashboard Cite

Experimental research on influence of gas adsorption on secondary electron emission of copper surface

Cited by 4 publications

References 14 publications

Effects of gas adsorbed on solid surface during gas breakdown in electron cyclotron resonance discharges

Effects of gas adsorbed on solid surface during gas breakdown in electron cyclotron resonance discharges

Gas Desorption and Secondary Electron Emission from Graphene Coated Copper Due to E-Beam Stimulation

Rolling temperature effects on linear current range of secondary electron emission properties of an activated Cu–3.0Be alloy

Contact Info

Product

Resources

About