Users Manual Part 6

IBA | A-8 | Clinical User’s Guide
Volume 1 - Treatment Session
Nozzle Types and Components
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Ionization Chambers No. 2 & No. 3 (IC2 & IC3)
Ionization Chambers No. 2 & No. 3 (IC2 & IC3) consist of two ionization chambers:.
The first single-surface collecting electrode along the path of the beam in Ionization
Chamber no. 2 (IC2) is divided into 32 parallel strips used to measure the profile and
position of the beam in the “X” direction. The second single-surface collecting
electrode in IC2 contains a circular (2-cm diameter) electrode at its center that serves
as a dosimetry monitor for the dosimetry channel. The surface around the circular
electrode is used to check if the beam is turned off after a beam stop request.
The first single-surface collecting electrode along the beam path in Ionization
Chamber no. 3 (IC3) contains a circular (2-cm diameter) electrode at its center that
serves as a dosimetry monitor for the dosimetry channel. The second single-surface
collecting electrode in IC3 is divided into 32 parallel strips used to measure the profile
and position of the beam in the “Y” direction. The surface around the circular
electrode is used to check if the beam is turned off after a beam stop request.