Fluke Biomedical 30-471 - Manual (Page 18)

Nuclear Associates 30-471
Operators Manual
3-2
Based on the characteristics of these detectors, they are used for specific applications such as exit dose
measurements, intracavitary measurements and also with radiation therapy. Given the quick response of
these detectors, they are very useful for verifying the patient’s dose delivered during therapy and also as
a safeguard against misadministered radiation treatments.
With various types of integral filters and build-up shields these detectors can measure radiation
exposures as low as 1 MeV and as high as 25 MV. They are also available with a negative or positive
polarity output. The various types of detectors have been color coded to identify them with a specific
energy range. This allows for ease of identification and avoidance of misuse. Following is a list of diodes
and their associated part numbers that are available.
Model Number Range Polarity Color
30-471 1-4 MV Phonton Positive Blue
30-471-8000 1-4 MV Phonton Negative Blue
30-472 5-11 MV Phonton Positive Yellow
30-472-8000 5-11 MV Phonton Negative Yellow
30-473 12-17 MV Phonton Positive Red
30-473-8000 12-17 MV Phonton Negative Red
30-474 18-25 MV Phonton Positive Green
30-474-8000 18-25 MV Phonton Negative Green
30-475 5-25 MeV Electron Positive Gray
30-475-8000 5-25 MeV Electron Negative Gray
Diode (type 474 [18–25 MV phontons])
output farmer chamber vs. SSD
SSD (cm)
Diode out
p
ut/far
mer chamber (normalized to 100 SSD)