This paper describes the mechanical design, the readout chain, the
production, testing and the installation of the Silicon Microstrip Tracker of
the D0 experiment at the Fermilab Tevatron collider. In addition, description
of the performance of the detector during the experiment data collection
between 2001 and 2010 is provided
A thin superconducting solenoid has been designed for an upgrade to the Fermilab D detector, one of two major hadron collider detectors at Fermilab. The original design of the D detector did not incorporate a central magnetic eld which necessitates a retro t within the parameters of the existing tracking volume of the detector. The two l a yer solenoid coil is indirectly cooled and provides a 2 T magnetic eld for a central tracking system. To minimize end e ects in this no iron con guration, the conductor width is varied thereby increasing current density at the ends and improving eld uniformity. This paper summarizes the results of the conceptual design study for the D superconducting solenoid.
Fabrication of a thin superconducting solenoid 1;2 for the Upgrade Tracking System 3 for the D Detector 4 at the Fermilab Proton-Antiproton Collider has begun. The 2.0 T magnet is 2.75 m long, 1.2 m in diameter and stores 5.6 MJ magnetic energy at full excitation. The magnet is novel in that no thin superconducting solenoid magnet for a particle detector has yet been fabricated which operates at this eld level.The magnet is to be installed in the existing D detector which has a thick magnetized steel muon absorber which surrounds the superconducting solenoid. In the event of an unexpected electrical short in the magnet is is desireable that the resulting asymmetric forces generated between the magnet and the muon steel not cause collateral damage to the detector.Although the magnet is designed to sustain a quench without a protection resistor such a resistor is provided to extract a portion of the stored energy from the magnet during a quench to permit faster recool after the quench. This resistor cannot be used for routine discharging of the magnet as its use at full current w ould in fact cause a quench. To enable timely routine discharge it can be switched into the circuit at some lower current to speed the discharge without causing a quench. It is necessary to estimate the current at which the protection resistor can be used to safely speed discharge.
Status: The cooling system design is not complete. This paper lays out the general design and some of the design calculations that have been performed up to this date. Further refinement will be performed. This is especially true in the piping layout, piping insulation and detector manifold areas.
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