The Mark-II vertex drift chamber

New Drift Chamber for - the Mark Ii

A new cylindrical drift chamber is being constructed for the Mark lI detector for use at the new SLAC Linear Collider. The design of the new chamber is based on a multi-sensewire cell of the jet-chamber type. In addition to driitime measure men@ pulse height measurements from the sense wires will provide electron-hadron separation by dE/dz. The design and construction of the chamber, tests of p...

Drift Chamber Vertex Detectors for Slc/lep*

The Mi's Ii Drift Chamber System*

The MPS II detectors are narrow drift space chambers designed for high position resolution in a magnetic field and in a very high particle flux environment. Central to this implementation was the development of 3 multi-channel custom IC's and one multi-channel hybrid. The system is deadtimeless and requires no corrections on an anode-to-anode basis. Operational experience and relevance to ISABE...

The Mark Ii Vertex Detectors: Status and Prospects*

The art of detecting heavy quark and lepton decay vertices among the collision products of e+einteractions has developed rapidly in the past ten years. To date, there have been three generations of detectors employed or under construction for measuring and identifying heavy quark and lepton decays. Figure 1 plots the history of the field since the beginning of the PEP/PETRA era in terms of the ...

The BaBar Drift Chamber

The central drift chamber for the BaBar detector at the PEP-II Bfactory at SLAC is a cylindrical chamber with a length of 280 cm and outer radius of 81 cm. It consists of 40 layers of small hexagonal cells arranged in 10 axial and stereo super-layers. In order to minimize multiple scattering, light materials are used for the mechanical structure, and the gas mixture is Helium based. The pulse-h...