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In order to obtain the escape beam characteristics of environmentally friendly insulating gas under the action of nanosecond pulse voltage, the generation laws of the escape electrons in clean air, SF6, and C4F7N/CO2 gas mixture were studied. An escape electron collection platform was built, and the charge amount of the generated escape electrons was measured when different amplitudes of nanosecond pulse voltages were applied to clean air, SF6, and C4F7N/CO2 gas mixture under different gas pressures. The results show that the low-energy electrons will accelerate and transform to escape electrons under the action of nanosecond pulse. The higher the nanosecond pulse voltage amplitude, the lower the gas pressure, and the larger the charge amount of escape electrons generated by insulating gas. The clean air has relatively weak inhibition on the generation of escape electrons, and the SF6 and C4F7N/CO2 gas mixture have obvious inhibition effect on the generation of escape electrons. As the pressure increases, the inhibition effect on the generation of escape electrons of C4F7N/CO2 gas mixture is more obvious than that of SF6.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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