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A tungsten target is an anode that is used to produce x-rays from a high-speed electron beam. The tungsten target is made of Rheni-tung, an alloy that is extremely strong and tough (resistant to cracking and swelling).
In diagnostic radiography, the cathode is connected to the anode by a tubehead, which contains a lead-lined particle irradiator device (PID). Electrons moving at half the speed of light strike the target, where they interact with the atoms in the anode to generate x-rays.
During an x-ray interaction, a small portion of the energy released by the electrons is converted to heat. The heat dissipates from the target, but a small amount remains within the target to cause damage to the target and degrade the quality of the x-ray.
Temperatures in the range of 1000 degC are common during x-ray production. To prevent these temperatures from damaging the target and degrading the quality of the x-ray, the base of the anode usually is made of copper, which conducts the heat away from the target.
For a given target thickness, we optimized the x-ray production efficiency by performing MC and transient FEA thermal simulations for the energy range within 60-140 kVp. The results show that the W-diamond transmission target can produce