The CLEO II detector was successfully upgraded in November 1995 to
include a precision silicon vertex detector (SVX).
In just over two years the device has accumulated better than 5.3 1/fb
of data at or near 10.58 GeV.
In what amounts to the physics debut of this device, we present
preliminary measurements of the charm meson lifetimes using data
collected with new SVX at CLEO. Soon to be published.
We describe a vertex detector comprised of three layers of double-sided
silicon wafers, installed in the CLEO II detector at the Cornell Electron
Storage Ring (CESR). The innermost silicon wafers are located a distance
of 2.35 cm from the stored electron and positron beams; the beams carry
a total of 300 mA of current. Characterizations of the improvements in
detector performance since VERTEX`96, results on beam related occupancy,
and evaluations of detector resolutions are presented. The prospects for
physics results from a data set corresponding to an integrated luminosity
of 4 1/fb with the device installed are discussed.
The proceedings are published in NIM A Vol. 418 No. 1 pages 32-39.