Experimental study of electrode materials for use in a cold-cathode oxygen discharge

The Druyvesteyn method of measuring electron energy distributions in low pressure plasmas has been applied to cold-cathode direct current glow discharges in oxygen and nitrogen at pressures in the range 0.010 to 0.050 mm Hg. Two discharge modes occurred in both gases. Mass spectrometer measurements showed that in nitrogen only N 2 + was present but in oxygen the ions O - , O 2 - , O + , O 2 + , were all present. O - and O 2 + concentrations were about equal in magnitude and formed over 90 % of the ions present. Electron energy distributions in the positive column showed three groups in oxygen and nitrogen. The data available from the oxygen discharge are consistent with the lowest energy peak being a manifestation of a large negative ion concentration ( n - / n e = 20).

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Experimental study on the effects of electrode materials on coal breaking by plasma

Fuel ◽

10.1016/j.fuel.2020.117085 ◽

2020 ◽

Vol 270 ◽

pp. 117085 ◽

Cited By ~ 2

Author(s):

Xiangliang Zhang ◽

Baiquan Lin ◽

Yanjun Li

Keyword(s):

Experimental Study ◽

Electrode Materials

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Experimental Study of Effect of Rare Gas Admixture on Temperatures of Microwave-Excited Oxygen Discharge Plasma

Japanese Journal of Applied Physics ◽

10.1143/jjap.45.243 ◽

2006 ◽

Vol 45 (1A) ◽

pp. 243-246 ◽

Cited By ~ 9

Author(s):

Takeshi Sakamoto ◽

Kouichi Naoi ◽

Haruaki Matsuura ◽

Hiroshi Akatsuka

Keyword(s):

Experimental Study ◽

Discharge Plasma ◽

Rare Gas ◽

Excited Oxygen ◽

Oxygen Discharge

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Experimental study on solid-state electrolyte and electrode materials for post li-ion batteries

10.14711/thesis-991012699268103412 ◽

2019 ◽

Author(s):

Yuqi Lyu

Keyword(s):

Experimental Study ◽

Solid State ◽

Electrode Materials ◽

Li Ion Batteries ◽

Solid State Electrolyte ◽

Li Ion

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Development of a conical anode Fe-gun for low voltage SEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100106958 ◽

1988 ◽

Vol 46 ◽

pp. 978-979

Author(s):

T. Miyokawa ◽

S. Norioka ◽

S. Goto

Keyword(s):

High Resolution ◽

Field Emission ◽

Low Voltage ◽

Irradiation Damage ◽

Cold Cathode ◽

Virtual Source ◽

Source Position ◽

Electrostatic Lens ◽

Electrostatic Lenses ◽

Wide Range

Field emission SEMs (FE-SEMs) are becoming popular due to their high resolution needs. In the field of semiconductor product, it is demanded to use the low accelerating voltage FE-SEM to avoid the electron irradiation damage and the electron charging up on samples. However the accelerating voltage of usual SEM with FE-gun is limited until 1 kV, which is not enough small for the present demands, because the virtual source goes far from the tip in lower accelerating voltages. This virtual source position depends on the shape of the electrostatic lens. So, we investigated several types of electrostatic lenses to be applicable to the lower accelerating voltage. In the result, it is found a field emission gun with a conical anode is effectively applied for a wide range of low accelerating voltages.A field emission gun usually consists of a field emission tip (cold cathode) and the Butler type electrostatic lens.

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