| The Earth's Magnetosphere and Auroral Acceleration Region | Moving and Guiding the CRT's Electron Beam | |
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| There
are many mechanisms responsible for controlling the direction and flow
of the solar wind particles to the earth's polar regions where the
auroras occur. They
include the solar wind, Earth’s magnetosphere, and a particle acceleration region
called the "auroral acceleration region"
The auroral acceleration region is located many thousands of kilometers above the earth's surface. It is located in the magnetosphere. The solar wind effects Earth in a second way. It creates or induces a voltage across the magnetosphere. This happens because the charged particles in the solar wind act like a conductor. As the charged particles move across a magnetic field, a voltage is created. |
There
are two mechanisms which control the direction of an electron beam in a
CRT so that an image is created- They are the magnetic and
electric fields.
The electrons which are produced by the cathode move to the anode. The anode accelerates the electrons and arranges them to form into a line called an "electron beam". The electron beam travels away from the electron gun towards the front of the CRT screen. In a CRT, the electron beam emerging from the electron gun passes through a magnetic modulating system which bends the electron beam and aims it to the front screen of the television or computer monitor. Most CRT's today move and guide the electron beam with only an electromagnetic coil that surrounds a section of the glass vacuum tube from the outside. |
