Coolidge Tube÷
It is a vacuum tube used for generation of X-Ray.
Principal of Coolidge Tube ÷ As cathode ray consist of fast moving electron hair electrons are generated by thermoionic emission. These electron are protected a high velocity by applying potential difference between cathode and the target thus when thes fast moving electron strike the target , X -Ray are Produced.
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| X-Ray Diagram |
Construction of Coolidge Tube÷ in a college street tube cathode c is tungsten filament ,which is heated by battery bi by regulating the current flowing through the element which is restored .Is a cylindrical shield of molybdenum surrounding the cathode thus the electron beam is focussed on target T.
X-rays are produced using a device called a Coolidge tube, which is a type of X-ray tube. The Coolidge tube was invented by William Coolidge in 1913 and is still widely used today. Here's a description of how X-rays are produced using a Coolidge tube:
Construction of the Coolidge Tube:
The Coolidge tube consists of a vacuum-sealed glass or metal envelope containing several key components.
An anode is a metal target usually made of tungsten or another high atomic number material. It is housed within the tube and is the primary source of X-rays.
A cathode is a heated filament, typically made of tungsten or thoriated tungsten, that emits electrons when heated.
An electron focusing cup or focusing electrode is placed around the cathode to shape and direct the electron beam towards the anode.
High voltage connections and control circuitry are also part of the Coolidge tube to supply the necessary electrical potentials.
X-ray Production:
When the Coolidge tube is energized, a high voltage is applied between the cathode and anode, creating a strong electric field.
The filament in the cathode is heated, causing the emission of electrons through thermionic emission.
The focusing electrode focuses and accelerates the emitted electrons into a narrow electron beam towards the anode.
X-ray Generation:
As the accelerated electrons strike the anode target, they undergo a rapid deceleration.
During deceleration, a significant portion of the kinetic energy of the electrons is converted into X-rays through a process known as Bremsstrahlung radiation.
The X-rays produced have a broad spectrum of energies, ranging from low energy to high energy, depending on the deceleration of the electrons.
X-ray Control and Collimation:
X-ray production can be controlled by adjusting the tube current, which is the number of electrons flowing from the cathode to the anode per unit time.
Collimators or filters are used to shape and control the X-ray beam. They are often made of lead or other materials that selectively absorb lower-energy X-rays, resulting in a more controlled and higher-energy X-ray beam.
X-ray Imaging or Applications:
The produced X-rays pass through the object or patient being imaged.
X-rays that pass through the object or body are detected on the other side by an X-ray detector, such as a film or digital sensor.
The detected X-rays create an image based on the differential absorption of X-rays by different tissues or structures within the object.
The resulting X-ray image provides valuable information for medical diagnosis, industrial inspection, and other applications.
Unfortunately, as a text-based AI, I cannot provide a diagram directly. However, you can easily find diagrams or illustrations of Coolidge tubes and X-ray imaging systems through a search engine, which will give you a visual representation of the components and setup.


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