สถาบันวิจัยแสงซินโครตรอน (องค์การมหาชน)

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Knowledge about light, synchrotron tron

Light, synchrotron tron what is

Light, synchrotron tron is the light that was unleashed from the electron-turn curve with a speed near the speed of light(speed of three hundred million meters per second.

Or about one billion kilometers per hour)

Why need light, synchrotron tron

Light, synchrotron tron is the light intensity, high energy value, continuous, comprehensive, range, wide power from the range of infrared radiation, until the x-rays makes can be applied to a variety of

We produce light, synchrotron tron?

In the production of light, synchrotron, electron, we need to have an electron moving with a speed near the speed of light, and forced to turn the arc, so the light source synchrotron, electron, therefore, consists of three main components, the part is

  1. Electron gun used for the production of particle beam of electrons
  2. System accelerator for the acceleration of the electron
  3. Band retention electron storage for a casual particles, high speed electrons, and forced to turn the curve with the magnetic field to release the light, synchrotron tron

Why must the electron

Truth, then, charged particles, all moving with the acceleration of plain emit synchrotron tron all, but due to the intensity of light, synchrotron tron released inversely proportional to the mass of the particle to the fourth in the production of light, synchrotron, electron, so it requires charged particles with mass, the youngest of which are electrons or positrons, but positrons that’s antiparticle, which produce it, complicated light source synchrotron, electron, so use electron

We produce electrons?

Particles, electrons can be produced using a device called a tube cathode Assembly which contains components as shown in the picture

Part of the cathode Assembly that is an alloy, when burned, allows the heat will make the electrons, the surface of the metal, dropped out, and when the power supply potential (high electron gun of the generator light Siam using the electric potential 120 kV) to the Orthodox Church, is the cathode and the anode is the anode, the electrons which have a negative charge from the cathode Assembly will run towards the anode and through out into the particle accelerator to accelerate further energy

We accelerate the electrons?

When the electron beam was produced from the electron gun will move into the particle accelerator direct (Linear accelerator or Linac) by the particle accelerator direct this is a copper pipe that was partition into the room as shown in the picture

The images show the structure, particle accelerators, direct

Inside the pipe is filled with waves, microwaves are 8 million watts, frequency of 2856 MHz, which was produced by a device called Chrysler tron, and was sent to the particle accelerator direct via pipes, lead the wave (wave guide) when an electron moving in a pipe, it will be accelerated by the electric field of the microwave

An electron is accelerated by a particle accelerator direct until power is 40 million electron volts, then the electron will be sent to accelerated in particle accelerators, circular called the booster synchrotron tron (booster synchrotron)

Show photo accelerators direct (LINAC)and a booster synchrotron tron (SYN)

In the booster synchrotron tron box copper called room, radio frequency, or RF cavity, which inner packing the radio waves are 35 kW and a frequency of 118 MHz when an electron moving through the RF cavity, it will be accelerated by the electric field of the radio waves to make energy, gradual increases in each round, moving in the booster synchrotron, electron by electron will move in the booster synchrotron tron (within the circumference of 43 meters), about 4 million cycles takes about 0.6 seconds, it will power 1 billion electron volts, which has a speed of about 99.999986% of the speed of light

Why electron-turn bend release of light, synchrotron tron

Reply simple, electrons are charged particles, which are particles called photons surrounded, when the electron lines, make the particle photon is a salad out (similar to that of being thrown out of the car rounded the corner), particle photon from being thrown out, it is light, synchrotron tron

Reply with physicist physics behind the liberation, the light, synchrotron tron is the equation of electromagnetic Maxwell’s

Four equations this equation tells of the relationship between the charge (alt)the speed of the movement of electric charge (aalt)electric field (aalt)and magnetic field (alt) can translate these equations into words is

  1. Electro is the origin of the electric field.
  2. Electro motion causes a change of the electric field and the induced magnetic field

Therefore, it was concluded that the electrical charge that moves causes the electromagnetic field in which the electromagnetic field is what we call light and electron is the charge, so we conclude that an electron moving at light always

When solving equations, electromagnetic Maxwell’s found that the electromagnetic field, or it is light, synchrotron tron emanating depend on the acceleration of electrons, also found that the acceleration is in perpendicular to the motion, that will give light, synchrotron tron with a higher intensity than the acceleration in parallel, very, this is why we need to force electrons, turn, curve, since while cornering. the electron will have the acceleration, which we called the acceleration towards the center, which has a direction perpendicular to the horizontal motion of the electron

We compel the electron-turn the curve?

We make the electrons turn the arc using a magnetic field when an electron moving through a magnetic field will cause a force perpendicular to the motion is called the force Lauren (Lolentz force) make the electron motion is an arc of a circle by the radius of curvature of the turn relative to the value of the magnetic field and the speed of the electron when cornering. the electron will emit synchrotron tron come out

In the loop retention electrons of the generator light Siam with a magnet, steering, or called a bending magnet, the number 8, which is electromagnetic create a magnetic field using a coil wrapped around the iron core and flow 1800 amperes into coils to create a magnetic field, size 1.44 Tesla makes the electrons turn the curve with the radius of curvature 2.78 m

The picture shows the magnetic steering (bending magnet) of the band the retention of the electrons of the generator light Siam and light emission, synchrotron, electron by electron cornering.

Photo show light emission, synchrotron, electron by electron, turn the bend in the magnetic steering all eight of the band retention electrons of the generator light Siam

Why must turn the curve with high speed

When the electron-turn curve at high speed is born, according to the theory of relativity makes the moment, the electrons emit light that shorter, which make it look like the light emanating from multiple points in the arc that arrive simultaneously, resulting in a light, synchrotron tron is casual small cone with high intensity

Light, synchrotron tron special?

A high-intensity light.

From the results of the theory of relativity makes the light a tron look is casual small cone with high intensity by precious light intensity per unit area of origin, higher than the sun about a million times.

Light is precious wavelength width

Due to the light, synchrotron, electron is released from the free electron value of the wavelength of light, thus covering a wide wavelength range from the near infrared up until x-rays make can be applied to a variety of applications.

Light source synchrotron, electron origin to the light precious a wide wavelength range from infrared to x-rays which wavelength range covering the size of a cell, protein molecules until the atom, so it can use the light synchrotron tron study the composition and structure of these things.

We use light, synchrotron tron made?

Light, synchrotron tron be used as a tool in educational research a variety of fields, especially the study of the composition and structure of various materials.

The study of the composition and structure of materials relies on the use of light, synchrotron tron stimulate the atoms inside the material, which will cause some processes, such as light was born scattering from a material or materials with the absorption of light or something fell out of the material, such as an electron fall out, or material with the liberation of x-rays, then to system, measure for measure light scattering or measure the optical density or measure the electrons or x-rays that are released, and then analyses the data is composition or structure material

What made measured after excitation with light, synchrotron, electron will provide different information to the example, if the measured x-rays scattering out of the material will have the information of the size and shape of the molecules or the size and shape of nano-particles, or if the measured electron out of the material will have information on the surface characteristics of the metal or semiconductor if the measured absorption of x-rays of the material data, the distance between the atoms within the material, if the measured absorption of infrared light of the material will have the data type of chemical bonding in the material, or if measure x-rays emitted by the material would have the data type of a is an element of the material, it etc Light, synchrotron tron can also be used to create a mould small, micron-scale to create a piece miniature size

Within the synchrotron light research Institute, so there is experimental station is around band retention electrons by the experiment station these are known by the things made to measure, such as experimental station scattering of x-rays experiment station absorption of x-rays experiment station to bearing x-rays etc.

The picture shows schematically the experimental station of the synchrotron light research Institute, the Central image is the band retention electron octagon circumference 81 m experiment station at the end of the synchrotron light, which is mounted around the circumference retention electrons each station trial light synchrotron tron wavelength range specifically for the technique to measure various

By Dr. Supakorn new love

Synchrotron light research Institute (public organization)