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Ordering Info


The IC-1000 is a three terminal spherical ionization chamber with an active volume of 1 liter. 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: 1000 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: 3.4 x 10E6 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 if ordered with gas flow option
Accessories: Supplied with wooden storage box

Ordering Information

IC-1000: Ionization chamber with storage box
IC-1000-GF: Ionization chamber with gas flow provision and storage box
Consult factory for other wall materials.

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Specifications subject to change without notice.
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