| Component | Fraction by weight(1) | A | Z |
Density [g/cm3] |
Radiation Length [cm] |
Radiation Length [g/cm2] |
|---|---|---|---|---|---|---|
| M55J carbon fiber (graphite) | 0.706535 | 12.0107 | 6. | 1.9100 (2, a, b,) | 22.3560 | 42.70 |
| Epoxy resin Epotek 301-1 (3) | 0.293465 | 11.8991 | 5.9883 | 1.19 (3) | 34.9894 | 41.6374 |
| M55J/EU334 | 11.9779 | 5.9966 | 1.63 (2) | 26.0016 | 42.3826 |
| (1) | The weight fracions have been calculated assuming the typical volume fraction of 60% for the fibers in the composite with epoxy resin (a). |
| (2) | The density of the pure fiber is 1.91 g/cm3. For the density of the cured composite, the value of 1.63 g/cm3 has been assumed. Other density values range from 1.53-1.59 to 1.75 g/cm3. |
| (3) | The composition of the effectively used epoxy resin could not be found. Therefore, the composition of Epotek 301-1 was adopted for the calculation, imposing the density declared by the producer of the prepreg (COI epoxy) . |
Calculation performed using the method described here and imposing the density.
The corresponding definition of this material in
/* $Id: AliITSvPPRasymm.cxx,v 1.70 2003/08/14 20:24:51 nilsen Exp $ */is:
AliMaterial(9,"SDD C (M55J)$",0.123565E+02,0.64561E+01,0.18097E+01,0.229570E+02,0.99900E+03);