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Technical Seminar
TS Department Technical Seminar: Construction, Assembly and Testing of the ALICE Dipole Magnet
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Europe/Zurich
AT Auditorium (CERN)
AT Auditorium
CERN
Description
The ALICE experiment is being installed at Point 2 of the LHC. The experimental area was previously used by the L3 experiment at LEP, and ALICE reuses not only the underground cavern, but also the large L3 solenoid as a central detector magnet.
The ALICE single arm forward muon spectrometer requires in addition a new dipole magnet with a very large aperture. In March 1997 the decision was taken to build a resistive dipole magnet. The general concept of the dipole magnet is based on a window frame return yoke fabricated from low carbon steel sheets. The flat vertical poles follow the defined acceptance angle of 9o. The excitation coils are of the saddle type. The dipole magnet has been developed in collaboration with a team from JINR (Russian Federation) and the main components were constructed in Russia and in European industry. The device has now been installed and commissioned in its permanent position in the ALICE cavern.
This talk will describe the employed manufacturing technology, the special tooling and handling jigs required to guarantee a controlled and repeatable assembly of the device and special features of the assembly process will be highlighted. The techniques and results of geometrical, thermal, electrical, magnetic and mechanical measurements in the final location will be presented.
To provide the necessary data for the particle track analysis, the magnetic field of both magnets has been mapped in the entire detector space and in the surrounding region where field sensitive electronics will be installed. Some relevant magnetic field results will also be summarized.
Organiser(s): Emmanuel TSESMELIS / TS
The ALICE single arm forward muon spectrometer requires in addition a new dipole magnet with a very large aperture. In March 1997 the decision was taken to build a resistive dipole magnet. The general concept of the dipole magnet is based on a window frame return yoke fabricated from low carbon steel sheets. The flat vertical poles follow the defined acceptance angle of 9o. The excitation coils are of the saddle type. The dipole magnet has been developed in collaboration with a team from JINR (Russian Federation) and the main components were constructed in Russia and in European industry. The device has now been installed and commissioned in its permanent position in the ALICE cavern.
This talk will describe the employed manufacturing technology, the special tooling and handling jigs required to guarantee a controlled and repeatable assembly of the device and special features of the assembly process will be highlighted. The techniques and results of geometrical, thermal, electrical, magnetic and mechanical measurements in the final location will be presented.
To provide the necessary data for the particle track analysis, the magnetic field of both magnets has been mapped in the entire detector space and in the surrounding region where field sensitive electronics will be installed. Some relevant magnetic field results will also be summarized.
Organiser(s): Emmanuel TSESMELIS / TS