Beam Therapy Dosemeter
Introduction
 |
Beam Therapy Dosemeter is portable digital instrument for an accurate measurement of dose and dose rate. The detector is a 0.5 cc. ionisation chamber provided with a perspex buildup cap, of wall thickness 4.75 mm, to enable calibration and use of chamber with Co-60 radiation. The measuring system is an electrometer operational amplifier with a high megohm resistor for exposure rate measurement and a low leakage capacitor for exposure measurement connected in the feedback path. The output of the measuring system is displayed on a Digital Panel Meter.
Specifications
Detector |
: |
0.5 cc. air equivalent ionisation chamber |
Wall material |
: |
Tufnol. Perspex build-up cap of thickness 4.75 mm provided for Co-60 radiation |
Range |
: |
Two linear ranges : |
Linearity |
: |
� 1% or � 1 digit. |
Energy range |
: |
30 KeV- 1.3 MeV high energy . photons and electrons (with appropriate calibration factors) |
Accuracy |
: |
+ 3% |
Reproducibility |
|
+ 0.1% |
Chamber voltage |
: |
+ 180 (V) and + 90(V/2) Volts |
Power requirement |
: |
Mains (23OV AC, 50 Hz) OR 6 Volts DC (4 x1.5 V'D'type cells) |
Dimensions |
: |
430 mm x. 300 mm x 120 mm |
Weight |
: |
5.5 Kg (without batteries) |
Application Areas
Useful for measuring beam outputs from accelerators, X-ray and Telecobalt machines and for evaluating HVT of X-ray beams
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For further information please contact
Head, Technology Transfer & Collaboration Division,
Bhabha Atomic Research Centre,
Trombay, Mumbai- 400 085
Tel : 091-022-25593897
Fax : 091-022-25505151 / 25519613
Email : headttcd@barc.gov.in
