Marco Schippers, Beam production techniques for hadron therapy
ESTRO-course, Esen, March 6-10, 2017 27
Extraction from cyclotron
Efficiency
=80%
(ACCEL / Varian)
Low radioactivity
Extracted beam
septum
Last turns
←
r
Cathode
at -50 kV
r
r
1
∝
δ
δ
r
δ
r