0 one of the electrodes (= objects that electricity moves through) in a piece of electrical equipment. The anode is the negative electrode in a battery and the positive electrode in an electrolytic cell. -- 正极，阳极
This design uses a long hollow anode of dimensions 300 80 40 mm.
As this takes place, the current of the electrons arriving at the anode decreases by the value of the emission current.
They have a finite and negative density gradient, and extend from the cathode to the anode.
Since cathode spots are sources of intense electron emission, their operation is governed by the closing of the electron current onto the anode.
In the limiting case, this barrier coincides in height with the potential barrier for the electrons going away toward the anode.
The total magnetic field pressure at the anode edge of the constriction is higher than at the cathode edge.
The electric field is decreased in the channel, and it is enhanced near the anode.
While the new electron subsequently starts to accelerate toward the anode, it leaves behind the ion which moves relatively slowly toward the cathode.
