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D
w
(
z
ref
) at any user quality
Q
(photons, electrons, protons, heavier particles
)
D
w,Q
=
M
Q
N
D,w,Q
o
k
Q,Q
o
beam
quality
factor
calibration
coefficient
at Q
o
corrected
instrument
reading at Q
There is no primary standardization lab for ion beam dosimetry!
Ionisation chamber dosimetry
The N
D,w
-based formalism IAEA TRS-398
Corrections
are applied for
air density
and
incomplete saturation
The
calibration factor
is supplied with the chamber