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[en] The Fermilab Collider Detector Facility (CDF) is a large detector system designed to study anti pp collisions at very high center of mass energies. The central detector for the CDF shown employs a large axial magnetic field volume instrumented with a central tracking chamber composed of multiple layers of cylindrical drift chambers and a pair of intermediate tracking chambers. The purpose of this system is to determine the trajectories, sign of electric charge, and momenta of charged particles produced with polar angles between 10 and 170 degrees. The magnetic field volume required for tracking is approximately 3.5 m long an 3 m in diameter. To provide the desired δp_Tp_T less than or equal to 1.5% at 50 GeV/c using drift chambers with approx. 200μ resolution the field inside this volume should be 1.5 T. The field should be as uniform as is practical to simplify both track finding and the reconstruction of particle trajectories with the drift chambers. Such a field can be produced by a cylindrical current sheet solenoid with a uniform current density of 1.2 x 10₆ A/m (1200 A/mm) surrounded by an iron return yoke. For practical coils and return yokes, both central electromagnetic and central hadronic calorimetry must be located outside the coil of the magnet. This geometry requires that the coil and the cryostat be thin both in physical thickness and in radiation and absorption lengths. This dual requirement of high linear current density and minimal coil thickness can only be satisfied using superconducting technology. In this report we describe the design for an indirectly cooled superconducting solenoid to meet the requirements of the Fermilab CDF. The components of the magnet system are discussed in the following chapters, with a summary of parameters listed in Appendix A

[en] Superconducting magnet technology is one phase of applied superconductivity where significant electrical power savings may be appreciated. Furthermore, these power savings may be gained without sacrificing reliability of operation or initial capital costs. The design and construction are described of 4 large superconducting dipole magnets which are being used at Fermi National Accelerator Laboratory to conduct high energy physics experiments. Two of these magnets were built and operated continuously for several months prior to installation in beam lines. Two larger superconducting dipoles are presently under construction, and both magnets will be completed this year. All magnets are designed to operate continuously without special attention, consuming approximately 10 percent of the power which would be demanded by a conventional magnet

[en] The Fermilab Collider Detector Facility (CDF) is a large detector system designed td study anti pp collisions at very high center of mass energies. The central detector for the CDF employs a large axial magnetic field volume instrumented with a central tracking chamber composed of multiple layers of cylindrical drift chambers and a pair of intermediate tracking chambers. The purpose of this system is to determine the trajectories, sign of electric charge, and momenta of charged particles produced with polar angles between 10 and 170 degrees. The magnetic field volume required for tracking is approximately 4 m long and 3 m in diameter. To provide the desired Δp_Tp_T less than or equal to 15% at 50 GeV/c using drift chambers with approx. 200μ resolution the field inside this volume should be 1.5 T. This field should be as uniform as is practical to simplify both track finding and the reconstruction of particle trajectories with the drift chambers. Such a field can be produced by a cylindrical current sheet solenoid with a uniform current density of 1.2 x 10⁶ A/m (1200 A/mm) surrounded by an iron return yoke. For practical coils and return yokes, both central electromagnetic and central hadronic calorimetry must be located outside the coil of the magnet. This geometry requires that the coil and cryostat be thin both in physical thickness and in radiation and absorption lengths. This dual requirement of high linear current density and minimal coil thickness can only be satisfied using superconducting technology. In this report we describe a design for a cryostable superconducting solenoid intended to meet the requirements of the Fermilab ies TDF

[en] A 3-m diameter, 5 m long superconducting thin solenoid with indirect cooling and an external support cylinder has been designed for the Fermilab Collider Detector Facility. An aluminum stabilized Nb-Ti superconductor produced by the extrusion with front tension (EFT) method is used. Radiation length for the solenoid is .831, and absorption length is .186

[en] The 3m diameter x 5m (1.5 Tesla) superconducting solenoid for the Fermilab Collider Detector Facility (CDF) is under construction in Japan. The coil consists of a single layer aluminum-stabilized monolithic NbTi/Cu superconductor fabricated with the EFT (extrusion with front tension) method. The forced flow cooling method of two-phase helium is used. In order to minimize the material thickness of the solenoid the coil is built without a permanent inner bobbin. The radial electromagnetic forces are supported by an aluminium cylinder placed radially outside the coil. The completed coil wounded on the removable mandrel is shrink-fitted with the support cylinder. Results of development work are presented

[en] A dummy solenoid coil of 3 m in diameter and 0.65 m in length was fabricated in order to establish a shrink-fit assembly procedure for a thin, large superconducting solenoid magnet without a permanent inner bobbin for a colliding beam detector. A dummy conductor of aluminum and actual insulation materials were used for the dummy coil. The coil thickness was 20 mm. After an outer support cylinder of aluminum alloy of 16 mm in thickness was shrink-fitted upon the coil, the temporary mandrel used for coil winding was removed. With this arrangement the solenoid can be built substantially thinner in terms of radiation thickness compared with those built with the conventional method. The interference between the coil and support cylinder to provide adequate pre-stress was determined. Various mechanical properties of the solenoid components required in the present method were studied. (orig.)

[en] A thin 3 m diameter x 5 m, 1.5 T superconducting solenoid for the Fermilab collider detector facility (CDF solenoid) was constructed. Cool-down and excitation tests of the solenoid were carried out. The design current is 5000 A and the stored magnetic energy is 30 x 10⁶J. The solenoid utilizes the forced flow cooling method of two-phase helium and does not have a permanent inner bobbin. The material thickness of the solenoid is 0.85 radiation length in the radial direction. An aluminium-stabilized NbTi/Cu superconductor fabricated with the EFT method was used. Radially outward magnetic forces must be supported with an outer support cylinder shrink-fitted outside the coil. The helium cooling tube of 20 mm in inner diameter and about 140 m in length was welded to the outer support cylinder. The maximum excitation current was limited to 2800 A in the present tests without an iron return yoke. Thermal response of the solenoid during the cool-down and excitation tests was very steady. A series of heater quench tests was attempted by using a heater installed at the outer support cylinder. The solenoid did not quench even for a heater input of about 10 kJ. In a warm-up test the liquid helium supply was shut off. The coil stayed superconducting for about 90 min and then the entire coil became normal very uniformly. This result is consistent with the measured heat load of the solenoid of about 35 W. The results of the present tests indicate the excellent thermal stability of the solenoid. (orig.)