Particle Therapy 2017

Small cyclotron; strong field Cyclotron works while: T circle independent from radius: (particles move in pace with Vdee)

Bq m . .2 π

T

=

Freq = 1/T circle V dee ~

circle

+

r

However (1): at very strong magnetic fields:

m = mass B = magnetic field q = charge

⇒ Magnetic field decreases with radius ⇒ T circle ↑

Marco Schippers, Beam production techniques for hadron therapy

ESTRO-course, Esen, March 6-10, 2017 28