Performance of the SLD Central Drift Chamber
- Stanford Univ., Stanford, CA (United States). Stanford Linear Accelerator Center; and others
The authors report for the first time on the performance of the Central Drift Chamber (CDC) of the Stanford Linear Collider Large Detector (SLD), which has been recording data since 1992. The low mass of the chamber and the use of a gas characterized by both a low drift velocity and low diffusion constant help to minimize the drift-distance measurement errors. They describe some of the calibrations and corrections applied to the data, and report on the resolutions achieved thus far. They measure an intrinsic drift resolution of 55--110 {micro}m in the region of uniform field. Analysis of the full drift-pulse waveform allows for efficient double-hit resolution of about 1 mm. Momentum resolution is characterized by the formula (dp{sub t}/p{sub t}{sup 2}){sup 2} = 0.0050{sup 2} + (0.010/p{sub t}){sup 2}, where p{sub t} is expressed in units of GeV/c. Used in conjunction with the SLD vertex detector, the CDC permits measurements of impact parameters of high-momentum tracks to the level of 10 {micro}m in the r-{phi} plane and 36 {micro}m in the r-z plane. A resolution of 6.4% is achieved in the measurement of dE/dx for the electrons in Bhabha scattering events.
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 129167
- Report Number(s):
- CONF-941061--
- Journal Information:
- IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 42; ISSN 0018-9499; ISSN IETNAE
- Country of Publication:
- United States
- Language:
- English
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