Author/Authors :
Abe، نويسنده , , K. and Arodzero، نويسنده , , A. and Baltay، نويسنده , , C. and Brau، نويسنده , , J. and Breidenbach، نويسنده , , M. and Burrows، نويسنده , , P.N. and Chou، نويسنده , , A. and Crawford، نويسنده , , G. and Damerell، نويسنده , , C. and Dervan، نويسنده , , P. and Dong، نويسنده , , D. and Emmet، نويسنده , , W. and English، نويسنده , , Simon R. and Etzion، نويسنده , , E. and Foss، نويسنده , , M. and Frey، نويسنده , , R. and Haller، نويسنده , , G. and، نويسنده ,
Abstract :
The SLD collaboration completed construction of a new CCD vertex detector (VXD3) in January 1996 and started data taking in April 1996 with the new system. VXD3 is an upgrade of the original CCD vertex detector, VXD2, which had successfully operated in SLD for three years. VXD3 consists of 96 large area CCDs, each having 3.2 million 20 μm × 20 μm pixels. By reducing the detector material and lengthening the lever arm, VXD3 is expected to improve secondary vertex resolution by about a factor of two compared with VXD2. The new three-layered structure enables stand-alone tracking without any ambiguity and its extended size along the beam direction improves the polar-angle coverage to |cos θ| < 0.85. An overview of this detector system and its initial performance are described.
Keywords :
SLAC , SLC , SLD , Vertex detector , CCD , VXD3
