[fluka-discuss]: How to understand the output of scoring cards ?

From: babintsev <babintsev_at_ihep.ru>
Date: Fri, 11 Jan 2019 13:12:02 +0300

   Hello

  could you please help me understand the output of different
  scoring cards ?

  I am interested in the number of particles from target.
  I  use the  example from tutorial course.

   example :  ... let us calculate the output of CHARGE Hadrons

     1) from  USRBDX card (unit 50)  the output of Charge Had into AIR :
              -----------
       Sp3ChH :
               Tot. resp. (Part/cmq/pr)  4.5073396E-03  +/- 1.239388     %
               ( -->      (Part/pr)       1.486836      +/- 1.239388     % )

       and I can get cumulative value :

               5.5792654E-05  = 5.4125518E-05 * (5.011875  - 3.981074 )

                  ... ok ...

      2) from  URSYIELD card (unit 57) the output of CHARGE Hadrons :
               -------------

        YieAng2 :

           Detector n:            2   YieAng2
      (User norm:          1.00000000
       sigma:              1.00000000      mb
       distr. scored:         218    ,
       from reg.           4  to reg.            5  )
       linear 1st variable (x1) binning from   0.0000E+00 to 3.1416E+00
                                           18 bins ( 1.7453E-01 wide)
       2nd variable (x2) ranges from   0.0000E+00 to  1.0000E+01
       1st variable (x1) is: Laboratory Angle (radians)
       2nd variable (x2) is: Laboratory Kinetic Energy
       The scored double differential yield is (normalized per primary
particle):
         plain d2 N / d x1 d x2 where x1, x2 are
         the first and second variables


       1st variable (x1) differential is a solid angle one

      Tot. response (integrated over x1)  0.1308400      +/- 1.208114     %
      ( --> Tot. response without normaliz.   0.1308400   +/-
1.208114     % )

          ... the total number is 0.1308400
              for energy interval - 10 GeV :

                  total number = 0.1308400 * 10 = 1.308400

                    so, we have difference with  initial value: 1.486836

          ...  and I cannot get cumulative distribution here :

              for the 1-st value :

              4.3209166E-05 * 0.1745329 = 7.54142104856139949e-06
                  but in the output I see :

                                          2.0000010E-05

                 ---------------------

   so, I have the following questions:

  *) integral for charge hadrons are different for

         USRBDX  and URSYIELD cards : 1.486836  and 1.308400

  *) and for the distribution I cannot get cumulative values in

           URSYIELD card output

  *) how to connect total number of charged hadrons from

              USRBDX card : 1.486836

     with Integral from  USRBIN card : 1.68 (from plot)

            ---------------------------

thank you,
Vladimir





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Received on Fri Jan 11 2019 - 14:06:27 CET

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