Best Dosimeter for 10 ns Pulse Dose Measurement

In summary: The best type of dosimeter for measuring short 10ns duration pulses of radiation is a thermoluminescent dosimeter.
  • #1
Salman Khan
19
1
Which type of dosimeter is best for pulse short (duration let say 10 ns) dose measurement purpose?
 
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  • #2
None? By definition a dosimeter measures dose over time. Or do you mean pulses over time?

10ns pulses sounds.....odd. can you say exactly what the application is?
 
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  • #3
russ_watters said:
10ns pulses sounds.....odd. can you say exactly what the application is?
Let's just say that he has a unique job in the industry... :wink:

1689206270031.png

https://www.freepik.com/free-photos-vectors/nuclear/9
 
  • #4
russ_watters said:
None? By definition a dosimeter measures dose over time. Or do you mean pulses over time?

10ns pulses sounds.....odd. can you say exactly what the application is?
If I want to measure the dose of FXR machine which may be use for radiography purpose. Such a machine produce output x-ray pulse of ns wedth.
 
  • #5
I think a thermoluminescent dosimeter (TLD) would be a good possibility since response time is irrelevant.
 
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  • #6
What is your idea about pocket dosimeter based on ion chamber ?
 
  • #7
That depends on what you will be using it for; since it is bulky it has low spatial resolution compared to a
TLD for example.

EDIT: to be clear it has to be uniformly irradiated.
 
Last edited:
  • #8
If you do not need real-time readings, the old-style photographic film dosimeter may be useful.

For real-time readings, perhaps a scintillation counter would do it.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3000535/
(found with:
https://www.google.com/search?hl=en&q=xray+scintillation+dosimeter)

A Geiger Counter can also be used:

From:
https://www.nrc.gov/reading-rm/basic-ref/students/science-101/what-is-a-geiger-counter.html
Other types of instruments can provide an exposure rate (expressed as milliroentgen per hour or mR/hr). These counters must be calibrated to read a particular type of radiation (alpha, beta, gamma, neutron, x-ray) as well as the amount of energy emitted. The reading will only be accurate for that type of radiation and that energy level. And these instruments need to be calibrated regularly to be sure they are providing correct information over time.

Cheers,
Tom
 
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  • #9
Hi Tom,

A Geiger counter can't work because a single beta particle would create one electrical pulse with a few microseconds dead time after and a 100ns criticality accident pulse of radiation would create one electrical pulse with a few microseconds dead time.

For a similar reason a commercial scintillation counter would also not work.
 
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  • #10
An additional issue with GM counters is that if the pulse is intense enough (which it must be if it is only 10 nsec wide) the radiation may cause the detector to go into a continuous discharge and become unresponsive. An ionization chamber might be possible although ion recombination issues may still be associated with the high-intensity beams.
 
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Related to Best Dosimeter for 10 ns Pulse Dose Measurement

What is a dosimeter and why is it important for measuring 10 ns pulse doses?

A dosimeter is a device used to measure the absorbed dose of ionizing radiation. It is crucial for measuring 10 ns pulse doses because such short pulses require highly sensitive and accurate instruments to capture the rapid energy deposition and ensure safety and precision in applications like medical treatments and radiation research.

What features should I look for in a dosimeter for 10 ns pulse dose measurement?

When selecting a dosimeter for 10 ns pulse dose measurement, look for features such as high temporal resolution, fast response time, wide dynamic range, and high sensitivity. Additionally, it should have the ability to handle high dose rates and provide accurate and reliable measurements.

Are there specific dosimeters recommended for 10 ns pulse dose measurements?

Yes, some dosimeters are specifically designed for short pulse measurements, such as the diamond detector dosimeters, silicon diode dosimeters, and certain types of ionization chambers. These devices are engineered to handle the rapid changes in dose rates and provide precise measurements for very short pulses.

How do I calibrate a dosimeter for accurate 10 ns pulse dose measurements?

Calibration of a dosimeter for 10 ns pulse dose measurements typically involves using a known radiation source with a well-characterized pulse duration and dose rate. The dosimeter must be exposed to this source under controlled conditions, and its readings are then compared to the known values to adjust and validate its accuracy. Regular calibration against a standard reference is essential to maintain measurement precision.

What are the common challenges in measuring 10 ns pulse doses with dosimeters?

Common challenges include ensuring the dosimeter's response time is fast enough to accurately capture the short pulse duration, avoiding saturation at high dose rates, and managing noise and interference that can affect measurement accuracy. Additionally, maintaining calibration and ensuring the dosimeter's sensitivity and linearity over a wide range of doses are critical for reliable measurements.

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