cold cathode การใช้

• Cold cathodes sometimes have a rare earth coating to enhance electron emission.
• Cold cathode discharge lamps use higher voltages than hot cathode ones.
• Most ion gauges come in two types : hot cathode and cold cathode.
• His early experiments were with Crookes tubes, a cold cathode electrical discharge tube.
• They come in two types : hot cathode and cold cathode.
• Both hot cathode and cold cathode type devices are encountered.
• The cold cathode system was installed in a number of gold mines and worked reliably.
• Cold cathodes may also emit electrons by photoelectric emission.
• This is in contrast to a cold cathode which does not have a heating element.
• Crookes tubes are cold cathode tubes, meaning that they do not have a heated pascal ).
• The excitation was provided by a cold cathode discharge; the total pressure was a few torr.
• He was a pioneer in neon tube designs, and in the design of cold cathode rectifiers.
• Cold cathode gauges are accurate from 10  " 2 torr to 10  " 9 torr.
• Cold cathode devices typically use a complex high voltage power supply with some mechanism for limiting current.
• Cold Cathode gauges are accurate from 10 & minus; 2 Torr to 10 & minus; 9 Torr.
• Recently, there has been renewed interest in using field effect arrays as cold cathodes in X-ray tubes.
• :: The cold cathode fluorescent lamp used as the backlight for most liquid crystal displays contains mercury.
• The process is too fast to preheat the cathodes, so the lamp instant-starts in cold cathode mode.
• The surface of cold cathodes can emit secondary electrons at a ratio greater than unity ( breakdown ).
• The cold cathode gives crossatron an advantage of achievable lifetime and reliability in comparison to a hydrogen-filled thyratron.