Exradin® Slim-Line
Miniature Thimble Chambers
Exradin® Slim-Line miniature chambers were developed specifically for assessment of the radiation fields encountered in stereotactic surgery where an extremely small sensing volume is needed to achieve good spatial resolution. Slim-Line design provides compact profile, but does not allow for gas circulation through the sensing volume.
Internally, Exradin® A1SL is identical to the A1 and Exradin® A14SL is identical to the A14. Externally, the A1SL and the A14SL differ in having a uniform thimble and stem diameter of only 6.25mm.
To insure atmospheric equilibrium, the chambers are vented through the sheathed cable and are therefore inherently waterproof.
The chamber wall, collector and guard are made entirely of C552 conducting Shonka plastic, a highly homogenous air-equivalent formulation which makes it ideally suited to the measurement of exposure. C552 consists of polyvinylidene fluoride matrix, in which finely divided inert powders of carbon black and silica are uniformly dispersed. Density is 1.76 g/cm3. Electrical resistivity is on the order of 0.03 Ohm-meters. Carbon black is the main source of electrical conductivity.