Seminare de DPNC
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Mercredi, 12 novembre, 1997

17.00 - Auditoire Stuckelberg

Universite de Geneve
Departement de physique
nucleaire et corpusculaire
24, quai Ernest-Ansermet
1211 Geneva 4

Tel. 022 702 6273
Fax. 022 781 2192

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Sujet:		The HERMES Experiment at DESY


Par:		Prof. Gordon Greeniaus,  University Of Alberta


Resume: HERMES is an experiment being performed at the HERA accelerator at 
DESY to sutdy the spin structure of the nucleon. Polarized internal gas 
targets are placed in the 27.5 GeV longitudinally polarized positron beam of 
HERA. Inclusive and semi-inclusive spin-dependent deep inelastic scattering 
are simultaneously measured in a forward spectrometer. The experiment was 
installed and commisioned on 1995. Data were obtained in 1995 with a polarized
 3He target and unpolarized hydrogen and deuterium targets. In 1996 and 1997 
a polarized hydrogen target was used and unpolarized target data were taked 
with hydrogen, deuterium and nitrogen, The HERMES experiment will be described
 and results from the 1995 and 1996 running will be presented. Upgrades for 
future running will also be discussed.