Re: About Dose Equivalent

From: Hantao Jing <>
Date: Sun, 30 Aug 2009 23:53:05 +0800

Dear Mr. Roesler,
       Firstly, thank you very much!
       In fact, I am doing a material test for designing a beam dump of
8kW. I want to estimate prompt dose equivalent on the edge of dump when
the accelerator is running. The reason that I chose this simple geometry
is to understand the dose-equivalent grads change with the distant
increasing. In fact, later, I want to test three materials: graphite,
iron, and copper.
      As a learner, I have a few experiences for designing a large-power
dump. So I hope to obtain some advices if possible. Thank you for your help!

                                                   Hantao Jing

Stefan Roesler wrote:
> Dear Hantao Jing
> Your input and conversion looks correct. What seems a bit unusual to me is
> that your are calculating *prompt* dose equivalent (i.e. whole bosy dose
> to a person) *inside* a huge aluminum cylinder (3meters radius, 5meters
> length). Is this what you want?
> All units in FLUKA are per primary by default, except for cases where the
> users defines explicitly a beam particle rate in the input (e.g. an
> irradiation profile for the calculation of residual dose rates).
> Best regards
> Stefan
> On Thu, 27 Aug 2009, Hantao Jing wrote:
>> Dear FLUKA experts,
>> I want to obtain the dose equivalent through the usrbin card. the setting
>> for usrbin card is,
>> USRBIN 10.0 240.0 57.0 200.0 200.0 200.0TEDepoit
>> USRBIN -200.0 -200.0 -200.0 80.0 80.0 80.0&
>> .
>> After I obtain the results, I want to converse the unit to mSv/hour. The
>> accelerator paramters is,
>> particles of per pulse: 1.6*10^13ppp,
>> pulse frequency: 1Hz.
>> The unit for dose equivalent from the manual is pSv/primary. Then I multiple
>> fluka results by the following factor,
>> (1.6*10^(13))*3600*10^(-9),
>> where the 3600 is 3600 seconds, 10^(-9) is the factor conversing the unit of
>> pSv to mSv.
>> But the I find the results is very larger than that I could image. What I done
>> is right? From the tutorial of '7th FLUKA Course, Paris Sept.29-Oct.3, 2008',
>> I find the unit for dose equivalent is pSv in page 10 instead of pSv/primary.
>> Which is an error?
>> My input file is in attachment. Thanks very much in advance!
>> Hantao Jing
>> 2009-8-27
Received on Sun Aug 30 2009 - 18:30:37 CEST

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