[ 1 ]  [ 2 ]  [ 3 ]  [ 4 ]  [ 5 ]  [ 6 ]  [ 7 ]  [ 8 ]  [ 9 ]  [ 10 ]  [ back ] 

  The barrel was first defined as 24 empty volumes (containers). In one of these volumes we implemented the base cell which describes one layer of lead, fibers and glue. This cell was replicated 199 times in this volume, to build a rectangular section part of the main trapezoid module (Fig. 9, left), the same idea was used to build a single module with rectangular shape, and this base cell was replicated 200 times in each of the remaining 23 modules (see Fig. 10). A program code with lattice transformation that performs a rotation and 200 translations for each module can be examined in appendix A. The remaining two triangle areas in the first module are filled with the real structure of lead, fibers and glue cylinder. These two regions were then replicated at the corresponding positions in the remaining modules, through a single rotation for each module (Fig. 9, left)
  The left panel of Fig. 9 presents details of the edge area between the base module and the first replicated area on its right side. In the right panel of Fig. 9 the energy deposits in the scintillating fibers at the edge of modules are presented. The figure was obtained for uniformly distributed photons.

Figure 9: Particular of the base cell and details of the implementation on the edge of two modules.

Figure 10: Visualization of the 24 trapezoid modules of the barrel calorimeter with FLAIR.

Figure 11: Energy depositions in fibers in the KLOE barrel calorimeter.

Giuseppe Battistoni; INFN, Milano
Jaroslaw Zdebik; UJ, Cracow

Last updated: 26th of October, 2010