For relative dosimetry scanning and measuring points in water, air, or other phantom material
The Exradin Miniature Shonka Thimble Chamber provides a perfect balance between fast scanning and point dose measurements within 1 cm in water, air, or other phantom material. The Model A1SL Thimble Chamber is the Slim-Line version of Model A1. It has the exact same internal dimensions and collecting volume as the Model A1, yet the entire chamber has the uniform diameter of 6.4 mm (0.250"), which is ideal when using a small phantom.
The chamber features exceptional spatial resolution for relative dosimetry scanning and is capable of measuring small field sizes of 6 mm by 8 mm for accurate point dose measurements. Its waterproof construction makes it ideal for use in water phantoms. The chamber vents through a flexible tube that surrounds the triaxial cable, ensuring the collecting volume is in pressure equilibrium with the surroundings. The design assures there are no stem or voltage soakage effects, providing precise and reliable measurements.
The Model A1SL is constructed of rugged C552 Shonka air-equivalent plastic, providing excellent conductivity and years of reliable use.
|Collecting Volume||0.057 cm3|
|Nominal Calibration Factor||60 R/nC|
|Centroid of Collecting Volume||4.1 mm from tip of chamber|
|Collector Diameter||1.0 mm|
|Outside Diameter of Shell Collecting Volume||6.35 mm|
|Wall Thickness||1.1 mm|
|Shell, Collector, and Guard Material||Shonka air-equivalent plastic|
|Venting||Vented to the ambient via the flexible vent tube surrounding the triaxial cable|
|Stem||Non-removable 0.64 cm OD x 5.6 cm long, black anodized aluminum|
|Nominal Collection Efficiency||1.000|
|Maximum Polarizing Potential||1000 V|
|Nominal Inherent Leakage Currents||10-15 A|
|Low-Noise Triaxial Cable||50 ohms, 29 pF/ft, 1.5 m long|
|Signal Connector||Triaxial BNC plug (2-Lug, male pin); others available upon request|
|High Voltage Connector||Integral with triaxial connector (shell of chamber is common with connector body)|
|Product Standards||CE0413, Designed to meet IEC 60601-1, IEC 60731|
Model A1SL Schematic
Specifications subject to change without notice.