cathode sparking
... 阴极炽点 cathode spot; 阴极打火 cathode sparking; 阴极倒相器 cathode phase inverter; ...
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如果碳纳米管阴极附近的真空度太低，将产生打火、气体电离、离子回轰阴极等问题，将导致阴极发射电流的迅速衰减。
If the vacuum near the cathode is too poor, it will generate spark, gas ionization and ion bombardment on cathode, which can result in a fast attenuation of the emission current.
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