Biomedical Engineering Reference
In-Depth Information
(a)
(b)
Fig. 10.40
Luxel
®
personnel dosimeter. (b) Filter pack,
showing detector, filters, and open window. (Courtesy
Landauer, Inc.)
gas. Electric fields direct the charge carriers through the hole in the oxide layer to re-
duce the charge initially stored on the floating plate. DIS dosimeters are calibrated
to provide dose assessment from the measured loss of charge. Depending on the
radiation fields to be monitored, characteristics of the wall material and thickness
as well as other factors can be varied to fit the application.
The basic design of the direct ion storage dosimeter gives it the flat energy
response of an ionization chamber. It has instant, non-destructive read-out. The
dosimeter shown in Fig. 10.41 with its reader is rugged, light (20 g without holder),
