Author/Authors :
Becks، نويسنده , , K.H. and Borghi، نويسنده , , P. and Brunet، نويسنده , , Els J.M. and Caccia، نويسنده , , M. and Clemens، نويسنده , , J.C and Cohen-Solal، نويسنده , , M. and Courty، نويسنده , , B. and de Boer، نويسنده , , W. and Delpierre، نويسنده , , P. and Drees، نويسنده , , J. and Gerlach، نويسنده , , P. and Glitza، نويسنده , , K.W. and Gregor، نويسنده , , I.M. and Guglielmi، نويسنده , , Erika L. and Hartmann، نويسنده , , F. and Heuser، نويسنده ,
Abstract :
To improve tracking in the very forward direction for running at LEP200, the angular acceptance of the DELPHI Vertex detector has been extended from 45° to 11° with respect to the beam axis. Pixel detector crowns cover the region between 25° and 13°. Due to very tight space and material thickness constraints it was necessary to develop new techniques (integrated busses in the detector substrate, high density layout on Kapton, etc.). About 1000 cm2 of pixels are already installed and working in DELPHI. Techniques, tests and production of these detectors will be described, as well as the main problems encountered during this work.
