What is a particle accelerator and where does the energy for the accelerated particles come from?

47.Why do hospitals have particle accelerators.

The electric field does work on the particles whose initial position is on one side of the plate" Here is the energy**.

In this process, the electric field does positive work on the particle, and correspondingly, it can be considered that the particle does negative work on the electric field, so the energy of the electric field decreases and needs to be supplemented by the outside world.

Each time the electric field is reversed, the electric field does positive work on the particle, so the velocity of the particle gradually increases, while the electric field continuously consumes energy and is replenished by the outside world to maintain its electric potential.

In fact, energy is also required to switch the direction of the electric field, but it does not act directly on the particles.

Energy is certainly required to maintain the magnetic field, but again, it does not act directly on the particles.

for follow-up.

The potential energy of the electric field will definitely decrease after doing work on the particle, but because the work done is too different from the potential energy, Ji Xiaoyou will not reflect it, and the electric field will also be supplemented by the external circuit, 1, the energy of the electric field is determined by the potential difference between the two point poles, with the work done on the particles, the potential difference between the two ends will decrease (energy conservation), and the external power supply will continue to make up for the decrease of the potential difference, so that it is maintained at the constant (value) laughing level of the TV difference, so, Taken together, the energy obtained by the charged particle is actually part of the energy provided by the external circuit (because there is a loss, it will not be 100% converted).

That's it for a short time, if you want to calculate, you can calculate it with the help of a simple two-pole plate capacitor as an external electric field...1. There must be a magnetic field.

1: Conversion of electricity into magnetic field, that is, electrical energy into magnetic energy, in which the energy of the accelerated particles of the electromagnetic particle accelerator comes from the electrical energy that provides the magnetic field.

2: Plates or magnetic poles, in which the energy of the particles accelerated by the electromagnetic particle accelerator comes from the plates or magnetic poles.

If you think about it, the magnetic field provided by the plates or poles is also time-limited, and the magnetic field will weaken over time, that is, the energy will also become smaller,..0, the energy of the accelerated particles of the electromagnetic particle accelerator comes from **.

The electric field does work on the particles whose initial position is located on one side of the plate, and the particles accelerate their motion to shoot out the electric field, enter the magnetic field, and return to the original electric field plate after half a turn and half a turn, although the position has changed, the electric potential energy is the same as at the beginning, and the kinetic energy has increasedLike this, circle by circle, the energy of the particles is getting bigger and bigger, and this energy comes from?

Let's reverse the electric field without consuming energy.

It doesn't seem to take energy to maintain an electric or magnetic field, just put the plates or poles there (at least theoretically).

What energy of the electric field decreases when the electric field does positive work on a particle? Is electric potential energy?

Correspondingly, it can be said that the particle does negative work on the electric field", do you mean that the particle does negative work on the "object" of the electric field?

I mainly don't understand how the energy of an electric field can be understood in addition to electric potential energy. That is to say, the charge distribution before and after the plate does work on the particle, that is, the electric field does not change; Then the particles return to the same electric potential after turning in circles, and the energy of "electricity" should not change.

The velocity of an ion moving between two points where the potential in the electric field is not used, changes under the action of the electric field.

For example, positive ions move from the positive plate of the electric field to the negative plate, and the velocity increases due to the repulsion of the positive plate and the attraction of the negative plate during the movement.

The linear particle accelerator has a simpler structure, consisting of two electrodes. Iontophoresis from one pole to the other, with increased velocity.

The main structure of the cyclotron particle accelerator is two hollow half-boxes paired into a box, with a gap between them, and each half-box is connected to one pole of the alternating electric field. The half-box is placed in a strong magnetic field, and the magnetic field lines are parallel to the cylindrical axis of the half-box. After iontophoresis is one half of the box, it moves in a circular motion under the use of a magnetic field, and is accelerated once through the gap into the other half of the box.

Because the half-box is fed with an alternating magnetic field, the ions can be accelerated back and forth many times.

47.Why do hospitals have particle accelerators.