Exradin A4 Ion Chamber

Proven guard design yields stable, precise measurements and minimizes settling time by creating uniform field lines
Shell, collector, and guard are made of durable, long lasting Shonka conductive plastic
Use of homogeneous material throughout the chamber minimizes perturbation of the beam due to the presence of the chamber and optimizes measurements
Axially symmetric design of the chamber provides an uniform, isotropic response
Non-removable one piece stem for easy, precise positioning
⁶⁰Co build-up cap of C552 is available
Additional build-up cap of Delrin is available
Ionization collection efficiency is 99.8% or better
Collecting volume is 30 cc

UNCOMPROMISING QUALITY

Ideal for calibration standards laboratories, health physics, research applications, manufacturing, and accelerator room scatter measurements

SHONKA-WYCKOFF SPHERICAL CHAMBERS ARE RELIED UPON BY STANDARDS LABORATORIES THROUGHOUT THE WORLD

Exradin Shonka-Wyckoff Spherical Chambers are designed for the precise measurement of radiation exposure and exposure rates. They are easily centered for precise positioning and are excellent for in air measurements.

FAST, PRECISE MEASUREMENTS

The design assures there are no stem or voltage soakage effects, providing precise and reliable measurements.

DURABLE CONSTRUCTION, BUILT TO LAST

The Spherical Chambers are constructed of durable C552 Shonka air-equivalent plastic, providing excellent conductivity and years of reliable use.

Specifications

REF Number	92715
Collecting Volume	30 cm³
Calibration Factor	0.09 R/nC
Collector Diameter	4.0 mm
Wall Thickness	0.50 mm
Wall, Collector, and Guard Material	Shonka air-equivalent plastic C552
Maximum Polarizing Potential	1000 V
Recommended Bias for Chamber Use	500 V
Nominal Collection Efficiency	100% at recommended bias
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)
Vent Holes	Two holes, open to the ambient, are located on the neck of the chamber
Stem	Non-removable 9.5 mm diameter x 22.9 cm, black phenolic
Buildup Caps Available	2.0 mm wall C552 (⁶⁰Co), 11.0 mm wall Delrin
Waterproof	No
Product Standards	CE₀₄₁₃, Designed to meet IEC 60601-1

Model 4 Schematic