Preview of the 2006/12 review findings

The panel recommends simulation
and optimization of the following possible configuration, one of which should
be chosen; either

• Two layers of active pixel sensors followed
  radially outward by a layer of ALICE
  style pixels (the HPD) located at a slightly larger radius than its present
  location, followed by the existing STAR SSD.
• Two layers of active pixel sensors followed
  radially outward by the IST1 and IST2 layers both at somewhat smaller radii
  than presently proposed, followed by the existing STAR SSD.

In the event the existing SSD can
not be counted on as part of the future mid-rapidity tracking system, the panel
recommends the following configuration be optimized:

• One IST layer (IST2) should remain approximately
  at its present location to recoup the functionality of the SSD. Inside this
  tracking layer, two layers of active pixel sensors should be followed radially
  outward by either a layer of ALICE
  style pixels at the present location of the HPD or a second IST layer (IST1) moved somewhat further in.