Determination of N
D,air
for a Cylindrical Chamber
Physicist :
Date :
Chamber
Model :
Serial N°:
Material / Thickness (g/cm
2
)
Internal radius(mm):
Wall :
Central electrode :
Buildup Cap :
Total thickness :
Calibration
Laboratory :
Date :
Calibration factor ref :
Nx
Nk
C/kg/div
R/div
Gy/div
Calibration Factor ref. N
k
Gy/div
Given at : Pressure P
o
:
kPa
Temperature T
o
:
°C
Relative humidity H
o
:
%
Polarisation volt :
V
Field size :
cm x cm
Source-chamber dist. :
cm
Other factors.
k
m
.k
att
:
W/e :
1-g :
(for Co60)
Results
N
D,air
=
From
Worksheets for IAEA code of practice TRS-277 for photon beams (P.ANDREO, L.CZAP)
, Adaptation E.DELATTRE