Home > Products > Detectors > IC-80



The IC-80 is a three terminal spherical ionization chamber. It has an active volume of 80cc. This chamber is used for direct comparison of radiation source strengths, beam monitoring in accelerator facilities, and accurate measurement of absorbed dose at a prescribed experimental point. The spherical detector is mounted on the end of a stem with the signal connections made through a terminal block. The block contains the BNC signal connector and the MHV high voltage connector. The stem effects are less than 1 x 10E-12A for a 1 x 10E4 R/h exposure with Co60. The effect may be minimized by using a + and – collecting voltage on the detector and averaging the readings.

Ionization Chamber: 80 cc spherical collecting volume; guarded three-terminal design; Tissue Equivalent plastic wall and collecting electrode; mounted on a 10.5-inch (26.7 cm) long aluminum stem; built in gas flow provision is optional
Wall Materials: Tissue Equivalent plastic r =239 mg/cm3
Signal Connector: BNC, mates with UG26OB/U or equivalent
Signal Output: 3.8 x 10E7 R/coul for air with CS137
Leakage: Typically 5 x 10E-15 A when low noise coax is used (measured without collection voltage).
Collection Efficiency: 99% for 3x10E5 R/h @ 250V, 99% for 7x10E5 R/h @ 300V
Recommended Signal Cable: Low noise coaxial, e.g., MALCO 250-3834-0000
High Voltage Requirements: Positive or negative polarity, 250 to 500 V depending on source strength. Shell is at high voltage potential.
High Voltage Connector: MHV, mates with UG 932 A/U or equivalent; optionally SHV
High Voltage Cable: RG-59/U or equivalent
Overall Size and Weight: Length including connectors, 14.0 inches (35.7 cm); stem is 10.5 inches (26.7 cm) long; weight 94 grams
Calibration Furnished: R/coul at Cs137 with air and appropriate gas
Accessories: Supplied with wooden storage box

Ordering Information
IC-80: Ionization Chamber with storage box
IC-80-GF: Ionization Chamber with gas flow provision and storage box
IC-80G: Ionization Chamber with graphite wall, gas flow provision, and storage box
Consult factory for other wall materials

Top of Page
Specifications subject to change without notice.
Far West Technology, Inc. © 2003 Fax: +1.805.964.3162 Tel: +1.805.964.3615 Email: [email protected]