Component | Weight Fraction(1) | A | Z | (Z/A) |
Density [g/cm3] |
Radiation Length [cm] |
Radiation Length [g/cm2] |
---|---|---|---|---|---|---|---|
Rohacell 51A | 0.153862 | 13.0957 | 6.5612 | 0.50102 | 0.052 | 760.4286 | 39.5423 |
Carbon-fiber/epoxy plies | 0.846138 | 11.9779 | 5.9966 | 0.50063 | 1.63 | 26.0016 | 42.3826 |
Ladder support ring | 12.1499 | 6.0834 | 0.50070 | 0.2875 | 145.7949 | 41.9193 |
(1) | The weight fractions have been obtained assuming that the carbon fiber plies have a thickness
of 0.5 mm all around the Rohacell core ring and that the overall outer dimensions of the rings
are (accordingly with the version "AliITSvPPRasymm.cxx,v 1.70 2003/08/14 20:24:51"):
|
Calculation performed using the method described here and imposing the density of the compound.
The corresponding definition of this material in
/* $Id: AliITSvPPRasymm.cxx,v 1.70 2003/08/14 20:24:51 nilsen Exp $ */is :
AliMaterial(84,"SDD/SSD rings$",0.123565E+02,0.64561E+01,0.18097E+01,0.229570E+02,0.99900E+03);