| Component(1) | Fraction by weight | A | Z | (Z/A) |
Density [g/cm3] |
Radiation Length [cm] |
Radiation Length [g/cm2] |
|---|---|---|---|---|---|---|---|
| Al | 0.431909 | 26.9815 | 13. | 0.48181 | 2.699 | 8.8959 | 24.01 |
| Polyimide film | 0.568091 | 12.7017 | 6.35992 | 0.50072 | 1.420 | 28.5626 | 40.5590 |
| Hybrid microcable | 18.8693 | 9.2278 | 0.48904 | 1.7854 | 17.5054 | 31.2546 |
| (1) | The weight fractions have been obtained assuming the following cable layers
(total thicness of cable = 24 μm,
effective thickness of homogeneus material for AliRoot = 16.8 μm): Polyimide fim, 12 μm thick, Al traces, 12 μm thick, 40% of the surface |
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(83,"SDD anode microcab$",0.186438E+02,0.91193E+01,0.17854E+01,0.176451E+02,0.99900E+03);