Central Solenoid
The Central Solenoid is designed to provide a 2 tesla strong magnetic field
in the central tracking volume.
It is a conduction-cooled superconducting solenoid based on a thin-walled
construction for minimum thickness to decrease particle scattering effects.
In order to reduce material build-up and enhance particle transparency,
the solenoid shares its cryostat with the liquid argon calorimeter.
The solenoid is made as a single layer coil.
The solenoid is 5.3 meters long with a bore of 2.4 meters, has a thickness
of 45 millimeters, a weight of almost 6 tonnes and operates at a current of
7,600 amperes.
All connections are made through a dewar situated on top of a 10 meters long
chimney. Twelve triangular glass-fiber supports sustain the coil inside the
cryostat. Pure aluminium strips are attached axially along the coil winding
to enhance the coil's operation margin by increasing heat conduction.
|
General