Objective
The HERMES is the third experiment at the electron-proton storage ring HERA (DESY-Hamburg). The collaboration consists of about 100 physicists from 21 institutions and from 8 different countries: Armenia, Canada, Germany, Italy, The Netherlands, Russia, United Kingdom and USA. It is planned to start data taking in 1995 and to run the experiment for about 4-5 years. The main aim of the experiment is the investigation of the internal spin structure of proton and neutron by means of deep inelastic polarized electron-nucleon scattering.
The HERMES set-up provides a unique opportunity to study both inclusive and semi-exclusive processes when, in conjunction with the scattered electron, some hadrons produced in the reaction have been detected.
The experiment addresses fundamental questions with an accuracy that is unmatched by other techniques. It is based on innovative technology: HERA will be the first high-energy storage ring with a longitudinally polarised electron beam. As the polarized internal gas target will be a thin-walled storage cell that is fed by a high intensity source of polarized hydrogen, deuterium and 3He atoms, this will result in an isotopically pure target of high density.
Scattered electrons and hadrons produced in the deep inelastic reactions are detected and identified by a magnetic spectrometer. An important part of this spectrometer is the magnet and a set of multiwire proportional chambers to be mounted in the magnet gap to facilitate track reconstruction through the magnet to the target.
The current project is concerned with the design, construction and commitment of the magnet with the constraints imposed on geometrical acceptance and field requirements by the experiment and of the six MWPC, each being composed of three submodules with one anode plane and two cathode planes.
Topic(s)
Call for proposal
Data not availableFunding Scheme
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00161 Roma
Italy