Aquadag: The bombarding electrons, striking the screen, release secondary emission electrons. These secondary electrons are collected by an aqueous solution of graphite called Aquadag which is connected to the second anode. Collection of secondary electrons is necessary to keep the CRT screen in a state of electrical equilibrium.

Deflection plates: The electron beam after leaving the electron gun passes through the two pairs of the deflecting plate. The pair of plate producing the vertical deflection is called a vertical deflecting plate or Y plates, and the pair of the plate which is used for horizontal deflection is called horizontal deflection plate or X plates.

Focusing anode and PD anode:

• The electron gun emits the electrons and forms them into a beam
• The electron gun mainly consists of a heater, cathode, a grid, a pre-accelerating anode, a focusing anode and an accelerating anode
• The electron while passing through the control grid is accelerated by a high positive potential which is applied to the pre-accelerating or accelerating nodes
• The electron beam is focused on focusing electrodes and then passes through the vertical and horizontal deflection plates and then goes on to the fluorescent lamp
• The pre-accelerating and accelerating anode are connected to 1500 V, and the focusing electrode is connected to 500 V