2022年07月24日
What is a target material?
What is a Target Material?
Graphic, textual, tabular, digital, video, or other presentations of target intelligence, primarily designed to support operations against designated targets by one or more weapon(s) systems. Target materials are suitable for training, planning, executing, and evaluating military operations.
Which is most used target material?
The target material 2-hydroxyethyl 5-norbornene-2-carboxylate (HENC) is mainly used as an intermediate in the pharmaceutical and electronic polymer industries.
How does target material affect the spectrum?
When a target material with high atomic number is selected, it will cause a shifting of the X-ray spectrum towards both high X-ray intensity and energy level (see Figure 4) [25].
Why is copper a target material?
Copper anodes are by far the most common (as shown above left) since copper gives the shortest wavelength above 1 Å. The wavelengths provided by, say, molybdenum and silver are normally too short for most powder diffraction work in the laboratory.
Which is better target tungsten or molybdenum?
No substantial difference in contrast was seen between molybdenum and tungsten in the soft-tissue density. At fat density, tungsten showed slightly better contrast at low kilovoltage (20 kVp), but molybdenum showed progressively greater contrast as the kVp increased.
What is the perfect choice of target material Why?
Tungsten is the material of choice for the target on x-ray tube for general radiography is for 3 main reasons: 1. Atomoc number – tungsten's high atomic number, 74, results in high-efficiency x-ray production and in high-energy x-rays. 2.
Why is tungsten used as target material?
Because of its properties such as high atomic number and high melting point (3,422 °C), tungsten is used as the target material in X-ray tubes [1].
Why molybdenum is used as a target material?
Solution : Molybdenum is used because it is a heavy element. When cathode rays hit this element , X-rays are produced. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
How will an increase in the atomic number of the target material affect the emission spectrum?
Discrete emission spectrum shifts to the right with an increase in the atomic number of the target material.
Is kVp quality or quantity?
kVp Influence on Beam QualityThe first and most obvious technical factor that influences beam quality is the kVp (kiloVolt potential). This is a parameter which is easy to change on the system and a major control knob for the image quality in x-ray radiography and CT imaging.