Title :
Large acceptance magnetic spectrometers for polarized deep inelastic electron scattering
Author :
Petratos, G.G. ; Eisele, R.L. ; Gearhart, R.A. ; Hughes, E.W. ; Young, C.C.
Author_Institution :
Stanford Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The design of two magnetic spectrometers for the measurement of the spin-dependent structure function g/sub 1//sup n/ of the neutron and a test of the Bjorken sum rule are described. The measurement consists of scattering 23-GeV polarized electrons off a polarized /sup 3/He target and detecting scattered electrons of 7 to 18 GeV at 4.5 degrees and 7 degrees . Each spectrometer is based on two large aperture dipole magnets bending in opposite directions. Proper choice of the deflection angles and the distance between the two dipoles in each spectrometer allows a tolerable background. Each spectrometer is equipped with a pair of Cerenkov detectors, a pair of scintillation hodoscopes, and a lead-glass shower calorimeter providing electron and pion identification with angular and momentum resolutions sufficient for the experimental measurement.<>
Keywords :
Cherenkov counters; calorimeters; electron detection and measurement; electron spectrometers; scintillation counters; 7 to 18 GeV; Cerenkov detectors; Pb-glass shower calorimeters; large acceptance magnetic spectrometers; large aperture dipole magnets; polarized deep inelastic electron scattering; scintillation hodoscopes; Apertures; Electrons; Helium; Magnets; Neutrons; Polarization; Scattering; Solid scintillation detectors; Spectroscopy; Testing;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.258949
