KA 4 Flashcards
1
Q
Why does the linac gun current increases ~1000 x when going from electron to photon mode?
A
remembering gun current= # of electrons produced at gun
The beam current is much higher in photon mode, as Bremsstrahlung production is inefficient (x-ray production from electrons hitting target= 99% heat, 1% x-ray).
2
Q
Flattening filters flatten the beam at a depth of _____
A
10cm
3
Q
What does a bonner sphere do?
A
measured neutrons
4
Q
What material is used for the target in an X-ray tube?
A
Tungsten
