RTI Barracuda User Manual

2. Description of the Barracuda
Hardware and Specifications
2012-10/4.3A
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Barracuda & QABrowser Reference Manual
Parameter
Range
- Low Sensitivity Ion Chambers
500 pA (8 ms) / 4000 pA (4 ms)
Pulse rate
- Normally
- Ion Chambers
0.5 – 100 Hz, resolution 0.5 Hz
0.5 – 25 Hz, resolution 0.5 Hz
Pulse width
4 ms - 2000 s
Duty cycle
5 - 95 %
Minimum pulse width
- Normally
- Ion Chambers
pulse width (min. peak current)
4 ms (12.5 pA) / 0.5 ms (100 pA)
8 ms (50 pA) / 4 ms (400 pA)
Pulse current
Same as for current (see above)
Smallest detectable charge/pulse
6.25 fC/pulse (4 ms) / 50 fC/pulse (0.5 ms)
Minimum ripple
(pulse top to bottom)
50 %
Irradiation time
1 – 65535 pulses, resolution 1 pulse
Note: Max dose/pulse depends on the pulse length.
Waveform recording time
At max sampling rate
320 ms (2 kSa/s)
At min sampling rate
40 s (16 Sa/s)
A total of 8 recording times are available, all separated by a factor of 2, i.e. 0.32, 0.63,
1.25, 2.5, 5.0, 10, 20, and 40 seconds.
The setting for Waveform recording time does NOT affect the Irradiation
time calculation from v3.0A of the firmware. This was an issue for earlier
versions.
2.6.4.3 Optional Detectors
Several different detectors, probes, and ion chambers from RTI Electronics can be
connected to the electrometer module (EMM). The measuring range are different
between the EMMs with bias and the two models without. The table below gives
measuring ranges for the most commonly used types.
The detector noise given is typical values at room temperature. The resolution can be
easily calculated by dividing the charge and current resolution, given in section
Specifications, EMM , by the typical sensitivity given for each detector below.
Example: An EMM-BiasW has a charge resolution of 50 aC and R100B has a
sensitivity of 55 µC/Gy. Thusly the R100B will have a dose resolution of 0.9 pGy.
Measuring range and inaccuracy
- R100B, Dose detector (typical sensitivity +55 µC/Gy)
Module type
Range
Inaccuracy
Typ. noise
EMM-BiasW
Air kerma (Dose)
100 pGy – 1.5 kGy
12 nR – 170 kR
±5 %
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RTI Barracuda Specifications

General

Brand	RTI
Model	Barracuda
Category	Medical Equipment
Language	English