The first attempt at modeling the ACD support structure is now present in the simulation. At the present time, (6/5/01), the support structure is still under development. Estimates were received from Tom Johnson (GSFC) one of the ACD's system engineers. Here are the numbers:
|
Top |
Side |
|
| Density of the core | 0.03206 g/cc | 0.03206 g/cc |
| Core thickness | 50.8 mm | 25.4 mm |
| Density of face sheet | 1.662 g/cc | 1.662 g/cc |
| Face sheet thickness | 0.508 mm | 0.508 mm |
The support structure is basically a sandwich of core material between 2 face
sheets. Given the densities of the material...the core is currently
simulated as FOAM05, which has a density of 0.05 g/cm. The face sheets are
modeled as Be, with a density of 1.85 g/cc. If anyone has a problem with
these approximations...we can generate some new PEGs files...
More information about the materials needs to be obtained. It seems that
SWIFT is using the same materials as support for some lead tiles?
Apparently Dave Palmer who is now located at Los Alamos did some studies on
these materials ... we need to contact the SWIFT team to get more
information.
Here are some pictures of the GUI before and after the ACD support structure
was added:
BEFORE AFTER
(Yes, the before picture includes more detail than does the after
picture...) The ACD support structure appears in brown.
There are some new items in the instrument.xml file to setup the support
structure. They are:
support_top_core_thickness
support_side_core_thickness
support_core_mat
support_face_thickness
support_face_mat
