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The CEBAF Large Acceptance Spectrometer (CLAS)

CLAS

Collaboration

2003

41 pages

Published in:

Nucl.Instrum.Meth.A 503 (2003) 513-553

DOI:

10.1016/S0168-9002(03)01001-5

Report number:

JLAB-PHY-03-01

View in:

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Abstract: (Elsevier)

The CEBAF large acceptance spectrometer (CLAS) is used to study photo- and electro-induced nuclear and hadronic reactions by providing efficient detection of neutral and charged particles over a good fraction of the full solid angle. A collaboration of about 30 institutions has designed, assembled, and commissioned CLAS in Hall B at the Thomas Jefferson National Accelerator Facility. The CLAS detector is based on a novel six-coil toroidal magnet which provides a largely azimuthal field distribution. Trajectory reconstruction using drift chambers results in a momentum resolution of 0.5% at forward angles. Cherenkov counters, time-of-flight scintillators, and electromagnetic calorimeters provide good particle identification. Fast triggering and high data-acquisition rates allow operation at a luminosity of 10 34 nucleon cm −2 s −1 . These capabilities are being used in a broad experimental program to study the structure and interactions of mesons, nucleons, and nuclei using polarized and unpolarized electron and photon beams and targets. This paper is a comprehensive and general description of the design, construction and performance of CLAS.

CLAS
Magnetic spectrometer
Electromagnetic physics
Large acceptance
JLab
magnetic spectrometer
superconductivity: torus
drift chamber: tracks
argon: organic compounds
momentum resolution

References(53)

Figures(0)

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