DEPTH OF IONIZATION-CHAMBER IN WATER

The device developed by the authors and described here enables the use r to measure the depth from the water surface to the point of measurem ent for a cylindrical ion chamber with a waterproof plastic cap in a w ater phantom, free of surface-tension error with a high precision. The device seeks vertical orientation and provides the convenience of han ds-free operation. The measurement process is simple and quick with a precision of 0.1 mm. (The device is currently available as a 'water ph antom depth gauge' from Nuclear Associates, Division of Victoreen Inc. , Glare Place, NY, USA.)