Re: Measuring pulsed fields

[John Andrews <andrewsjp@chartertn.net>]

Kim, you cannot measure short duration pulses with a GM detector.  The 

instrument responds with one count regardless of the size of the 

radiation event.  You can use dosimeters (quartz fiber ion chambers, not 

GM electronic) to measure the integrated dose.  Be sure the wall 

thickness is sufficient to ensure electronic equilibrium for the energy 

of the incident radiation. 



You didn't say what you wanted to measure.  I assume you want to measure 

the total dose over some period of time.   My experince with flash x-ray 

equipment is that the total doses are pretty small per flash because of 

the very short duration.  Given that you may find that you need to 

integrate over a number of events to get a reasonable reading.  Good luck.



John Andrews

Knoxville, Tennessee





Kim D. Merritt wrote:



> Is the Bicron 2000 w/ HP270 or the RO2 adequate for measuring pulsed 

> x-ray fields with microsecond pulsewidths?  I don't have the manuals 

> for these instruments.  Alternately, can anyone recommend an 

> instrument that is good for measuring these kinds of fields.

>

> Kim Merritt

> Radiation/Laser Safety Officer

> HazMed, Inc.

> NASA Langley Research Center







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