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Published April 21, 2004 | public
Journal Article

Basic instrumentation for Hall A at Jefferson Lab


The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro- and photo-induced reactions at very high luminosity and good momentum and angular resolution for at least one of the reaction products. The central components of Hall A are two identical high resolution spectrometers, which allow the vertical drift chambers in the focal plane to provide a momentum resolution of better than 2×10^(−4). A variety of Cherenkov counters, scintillators and lead-glass calorimeters provide excellent particle identification. The facility has been operated successfully at a luminosity well in excess of 10^(38) cm^(-2) s^(-1). The research program is aimed at a variety of subjects, including nucleon structure functions, nucleon form factors and properties of the nuclear medium.

Additional Information

© 2003 Elsevier B.V. Received 16 July 2003; received in revised form 7 November 2003; accepted 17 November 2003. The continuous dedicated and professional contributions from the Hall A technical staff and from the Accelerator Division is gratefully acknowledged. This work was supported by DOE contract DE-AC05-84ER40150 under which the Southeastern Universities Research Association (SURA) operates the Thomas Jefferson National Accelerator Facility, and by the National Science Foundation, the Department of Energy, the Istituto Nazionale di Fisica Nucleare (Italy), the Commissariat à l'Énergie Atomique (France), the Centre National de Recherche Scientifique (France), Conseil Régional d'Auvergne (France), the Natural Sciences and Engineering Research Council (Canada) and the Korean Science and Engineering Foundation.

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