(1) But it provides too small emission current density and gives a large gate current.

(2) The results show that the density of emission current from doped diamond film is increased by one order of magnitude.

(3) The emission current density of the field emitter is primary determined by the surface field strength of the cathode.

(4) A carbon nanotube cathode with high emission current has been fabricated with the screen printing method.

(5) The phenomenon of large cathode emission current of diamond in a low electric field is reported, and the several emission mechanisms are summarized.

(6) Non uniform temperature distribution causes deviation in emission current, the error of which is less than 5% for the shortest length of diode cathode.

(7) In field emission devices, the emission current sometimes degrades with the time.

(8) The aligned nanotube thin films are substantially strong, and chemically inertial with their onset field low and the emission current strong.

(9) The electron emission film can restrict the field intensity to a low level when it causes an emission current to flow, and has a uniform electron emission characteristic.

(10) A new method is presented for measurement of internal pressure of vacuum interrupters, having no use of magnetic fields but using decay velocity of emission current.

(11) Then the cathode current density can be obtained from the processed emission current density distribution curve.

(12) Aim To study the effects of different dispersers and heat-treatment under different plasma atmospheres on field emission current and threshold value electric field.

(13) By using the transfer matrix method, we calculated the quantum energy levels and emission current.

(14) Our experiments showed that it can ensure the same stability of thermal emission current by use of a new method of corroding cathode point.

(15) In the article, we calculate the quantum energy levels and emission current, respectively using WKB method and the transfer matrix method .

(16) 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.

(17) Experimental results show that, when increasing the nitrogen, the emission current density increases and the turn-on field decreases.

(18) After studying the relevant basic theories, the relationship between the field emission current and the work function of semiconductor and the temperature is analyzed.

(19) The results show that the alarm time depends strongly on both the gas concentration and the emission current of the ionization gauge.

(20) This resistance, which is concerned with the doping and shape of the emitter, has a negative feedback action to the emission current of the emitter.