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To study the mechanism of current degradation of a cold cathode, the outgassing measurement of a field emission diode with screen-printed CNTs cathode has been taken with a quadrupole mass spectrometer (QMS) in an ultra-high vacuum (UHV) system. It was found that the H2, CO2, and CO were outgassed from the diode during the working process. The field emission properties of the cold cathode, such as...
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