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CT Ion Chambers Specifications for 10 cc high sensitivity Detector type Vented air ion chamber Volume 10.1 cc Sensitive length 10.0 cm Chamber material Acrylic (PMMA) Chamber outside diameter 0.5 in ± 0.015 in (12.7 mm ± 0.4 mm) Chamber inside diameter 0.45 in (11.44 mm) Chamber wall thickness 77 mg/cm2 Electrode material Aluminum, 1100 Sensitivity 3.2 R•cm/nC (nominal) or 0.3/nC Standard calibration 100 kVCP, 5.5 mm Al HVL (NIST Tech. M100)

Response uniformity along axis ± 3% over central 90% of active length Beam orientation Normal to chamber axis Leakage current (300 V collection potential) Less than 10-14 A at 10 min polarization time Intensity limits Continuous beam: 31.6 R/sec, (1% recombination loss) Pulsed beam 15.8 mR/pulse (1% recombination loss) Collection time 0.478 mSec Cable length 3 ft (0.9 m) Operating voltage - 300 V Specifications for 3.2 cc Detector type Vented air ion chamber Volume 3.2 cc Sensitive length 10.0 cm Chamber material Polystyrene Chamber inside diameter 6.4 mm Chamber wall thickness 54 mg/cm2 Electrode material Aluminum Sensitivity 10 R•cm/nC (nominal) Standard calibration 100 kVCP, 5.5 mm Al HVL (NIST Tech. M100) Response uniformity along axis ± 3% over central 90% of active length Beam orientation Normal to chamber axis Phantom adapter OD 1.27 ± 0.04 cm (0.50 ± 0.015 in) Leakage current (300 V collection potential) Less than 1013 A at 10 min polarization time, less than 1014 A at 2 hr polarization time Intensity limits Continuous beam: 4.86 kR/min (1% recombination loss) Pulsed beam 51.5 mR/pulse (1% recombination loss) Typical energy dependence for 3.2 cc ion chamber (phantom adapter removed) Maximum pulse repetition rate 3.3 kHz Cable length 3 ft (0.9 m) Operating voltage - 300 V Available model(s) 660-6 CT Ion Chamber, 3.2 cm3, with UHF termination: used with Victoreen® Model 660 Electrometer 500-100 CT Ion Chamber, 3.2 cm3, with coax BNC for signal & banana plug for bias: used with Model 35040 (ATD), TRIAD™ and TRIAD TnT 500-200 CT Ion Chamber High Sensitivity, 10 cm3 for multislice CT, with coax BNC for signal & banana plug for bias: used with Model 35040 ATD and other electrometer/dosimeters, including TRIAD and TRIAD TnT 6000-100 CT Ion Chamber, 3.2 cm3, with triax BNC: used with Victoreen Models 4000, 6000, 8000 and RAD-CHECK® PLUS 6000-200 CT Ion Chamber High Sensitivity, 10 cm3, for multislice CT, with triax BNC: used with Victoreen Models 4000, 6000, 8000 and RAD-CHECK PLUS

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Supertech ®   President: David B. McNitt   V.P. of Marketing: Judy McNitt-Mell   Asst. to the President: Joy E. Nystrand

Address:   P.O. Box 186   Elkhart, IN 46515 USA   Sales: 800-654-1054   Phone: 574-264-4310   Fax: 574-264-9551

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