Vertical drift chambers for the Hall A high-resolution spectrometers at Jefferson Lab

Kevin Fissum, W Bertozzi, J .P. Chen, D. Dale, H.C. Fenker, J. Gao, A Gavalya, S Gilad, C.R. Leathers, N Liyanage, R.O. Michaels, E. A. J. M. Offermann, J. Segal , J. A. Templon, R. Wechsler, B. Wojtsekhowski, J. Zhao

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

The High-Resolution Spectrometers in Hall A at Jefferson Laboratory have been instrumented with state-of-the-art Vertical Drift Chambers designed and constructed by the Nuclear Interactions Group at MITLNS in conjunction with the Physics Division at Jefferson Lab. These chambers rely on a unique, high cell-density design made possible by the absence of field-shaping wires. Each chamber has an inherent per-plane resolution for 5-cell cosmic-ray tracks of 145 μm FWHM when operated on the bench at -4.8 kV with argon-isobutane gas, and 225 μm FWHM for 5-cell electron tracks when operated in the High-Resolution Spectrometer detector stack at -4.0 kV with argon-ethane gas. The design and construction facilitates wire placement and replacement to 50 μm, very low dark current, and no cross-talk. The detectors have been in almost continuous use since April 1996, providing reliable, high-resolution charged-particle tracking data for the Hall A physics program. A complete overview of this project is presented.
Originalspråkengelska
Sidor (från-till)108-131
TidskriftNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volym474
Nummer2
DOI
StatusPublished - 2001
Externt publiceradJa

Ämnesklassifikation (UKÄ)

  • Acceleratorfysik och instrumentering

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