SDD Materials : Ladder-support rings

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"):
    out.radius (cm)   inn.radius (cm)   thickn.along Z (cm)
ladder support on layer 3 (volume I097) 14.10 13.10 2.00
ladder support on layer 4 (volume I098) 22.95 21.95 2.00
ladder support on layer 5 (volume I217) 36.80 35.80 2.00
ladder support on layer 6 (volume I219) 42.40 41.40 2.00

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);

 
  Back to SDD materials page
Click here for comments and suggestions.