How are electromagnetic fields generated in the cavity resonator for particle acceleration?
In the acceleration tube of a linear accelerator, the electric field direction runs in and against the direction of electron flight.
The magnetic and electric fields of an electromagnetic wave are perpendicular to the direction of propagation, which is why I think that the fields in the cavity resonator of the linear accelerator are generated with a coil,
However, I have not seen this in any picture yet.
The acceleration is also supposed to be caused by an electromagnetic wave, which I don't understand for the reason stated above: "…an electromagnetic wave with a high frequency is excited in a specially shaped cavity. The shape of the cavity and the frequency of the wave…are coordinated in such a way that the wave is reflected back and forth, forming a standing wave…If a particle flies through at the right time…it is accelerated by the electric field of the wave."
How are the alternating electric fields generated in the cavity resonator to accelerate charges?
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The cavity resonator of a linear accelerator generates electromagnetic fields through the excitation of an electromagnetic wave with a high frequency in a particularly shaped cavity.
The shape of the cavity and the frequency of the shaft are matched to one another such that the shaft is reflected back and forth and a standing shaft is formed. When a particle flies through the cavity at the right time, it is accelerated by the electric field of the shaft.
A coil is used to generate the electromagnetic field that stimulates the electromagnetic wave. This field accelerates the particles flying through the cavity. Since the electric field extends perpendicular to the direction of propagation of the shaft, it can accelerate charges in the desired direction.