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Outline
Discharge-pumped excimer laser has some unique applications in the biomedical field. However, there still exist some practical problems to be solved in the process of engineering, such as machine heating and electromagnetic compatibility. The discharge-pumped circuit structure of excimer laser was introduced, the electromagnetic radiation and heat generation of the laser head and high-voltage charging power supply were analyzed, and the working states of an LC series resonant high-voltage capacitor charging power supply in different modes were compared. In addition, the heating and electromagnetic radiation of each part in the high-voltage capacitor charging power supply in different working modes were compared through experiments. Experimental results show that when the circuit switch tube worked in the mode of fs=fr/2, the IGBT junction temperature decreased by 16.8 ℃ compared with that in the mode of fs≥fr, and the IGBT loss was also reduced by 83.7 W (i.e., 82.8% in proportion) in the meantime, thus effectively reducing the temperature of the high-voltage charging power supply and improving the machine’s electro-optical conversion efficiency. Moreover, the peak value of magnetic field intensity was reduced by 16.53 dB, and the peak value of electric field intensity was reduced by 20.05 dB, effectively suppressing the electromagnetic radiation interference.
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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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