FHC transverse profile study 4

 

  With the FHC Zoffset is 948 cm. Pion+, pion- , neutron and anti-neutron are shot to the center of FHC, and the positions on the surface of FHC are (124,5,948), (124,-5,948). The energy of particles are 60 GeV and I digitized the energy for one count is 50 Mev.

          Fig1,  the geometry of the FHC and FMS is

 

     1, pion+

    (1) position (124,5,948) on the surface of FHC,

    Fig2, number of events VS the largest energy deposit in FHC of one hit and of one tower. The left pannel is for energy deposit of one hit and the right pannel is for energy deposit of one tower.

 

    Fig3, number of events VS mutiplicity of FHC tower above 0.05 GeV, 0.25 GeV and 0.50 GeV.

 

    Fig4, number of events VS RMS of energy weighted X(Y) FHC position.

 

 

 

 

    (2) position (124,-5,948) on the surface of FHC,

    Fig5, number of events VS the largest energy deposit in FHC of one hit and of one tower. The left pannel is for energy deposit of one hit and the right pannel is for energy deposit of one tower.

 

    Fig6, number of events VS mutiplicity of FHC tower above 0.05 GeV, 0.25 GeV and 0.50 GeV.

 

    Fig7, number of events VS RMS of energy weighted X(Y) FHC position.

 

    The other plots for pion-, neutron and anti-neutron are in

  http://www.star.bnl.gov/protected/spin/xuanli/FHC/transver_pro/,

  file name begun with "Em_Esum" is like Fig2,

  file name begun with "Ecell_Esum" is like Fig3,

  file name begun with "Tprof_Esum" is like Fig4,

  number "54" is for position (124, 5, 948) on the surface of FHC,

  number "55" is for position (124, -5, 948) on the surface of FHC.

  For example, Ecell_Esum_pim_54.root.gif is for point to the position (124, 5, 948) pion- particle number of events VS mutiplicity of FHC tower above 0.05 GeV, 0.25 GeV and 0.50 GeV.

   2, pion-

    the plots are in

 http://www.star.bnl.gov/protected/spin/xuanli/FHC/transver_pro/pi-/


   3, neutron

    the plots are in

 http://www.star.bnl.gov/protected/spin/xuanli/FHC/transver_pro/n/

   4, anti-neutron

    the plots are in

 http://www.star.bnl.gov/protected/spin/xuanli/FHC/transver_pro/anti-n/