Why tungsten is the material of choice for Target?

Friday, February 13, 2015

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. Thermal Conductivity – Tungsten has a thermal conductivity nearly equal to that of copper. It is therefore an efficient metal for dissipating the heat produced.

3. High Melting Point – Any material, if heated sufficiently, will melt and become liquid. Tungsten has a high melting point (3400° C compared with 1100° C for copper) and therefore can stand up under high tube current with out pitting or bubbling.

More About:
X-ray Imaging Systems
The X-ray Tube Support System
Interventional Radiography

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