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The race-tract magnets using F1 Rutherford cable (Cu stabilized [Nb.sub.3]Al strands) are tested and their quench characteristics are studied. The advantages and disadvantages of these Rutherford cables containing [Nb.sub.3]Al strands re discussed.

The feasibility study of Cu stabilized [Nb.sub.3]Al Rutherford cable for application to high field accelerator is discussed. Results suggest that the [Nb.sub.3]Al Rutherford cable possesses stronger strain-stress characteristics and is useful for application in case of compressive force beyond 150 MPa.

The study describes the characteristics of the round and extracted strands of [Nb.sub.3]Al wires Rutherford cable with copper stabilizer, which exhibits very low packing factor. The strands can be used as future high field accelerator magnets due to the great fluctuation in their magnetization.

Several three-directional FEM analyses are studied to understand the effects of pre-bending on the [Nb.sub.3]Sn composite wires. The results demonstrate the existence of a direct correlation between the minimum von Mises strain and [J.sub.cm] related to pre-bending.

A study is conducted to examine the quench behavior of cosine theta Nb(sub 3)Sn high field dipole magnets a three-dimensional simulation program is made using ANSYS finite element analysis program. Animation programs based on the quench program are shown very effective for the detailed quench analysis.

The development of high field superconducting dipole NB3Sn magnets for very large hadron collider by Fermilab is discussed.

The results of the fabrication and testing of a high field dipole mechanical model for a Very Large Hadron Collider are reported.

Magnetic design, random harmonics, coil magnetization and iron saturation effects of the Fermilab 11 T Nb3Sn short dipole model are described.

The results of a study into the design of a superconducting magnet with a two layer cosine-theta coil for Very Large Hadron Collider are reported, focusing on coil magnetization and iron saturation effects.

The mechanical design and analysis of the Fermilab 11 T Nb3Sn dipole model is presented.

The results of magnetic, mechanical and quench protection analyses of the 11 T Nb3Sn dipole model being developed at Fermilab are reported.

The alternating current (AC) losses of stabrite-coated Rutherford cables for the Large Hadron Collider winding with applied fields directed either parallel or perpendicular to the broad face were subjected to calorimetric and magnetic measurements. Results show that a thin metallic or insulating core in the cable will reduce face-on oriented AC losses by a factor of 10. Suppressed face-on losses may also be controlled by changing the internal or external compaction levels.

Battery energy can be used for superconducting magnet operation if the current of the battery is controllable. Several current-control methods are discussed: variation of electrolyte temperature, variation of exposed electrode area, and the mechanical switching of cells. A circuit for continuously controlling the current using mechanical switches was proposed and a demonstration experiment, in which 'D' size Ni-Cd batteries were used for the smooth control of the current up to 45 A, was successfully performed.

Dipole magnets for the R&D of SSC were built and tested at Fermilab. The magnetic field properties were studied using short models and full scale models. Effect of coil size variation, insulation material, shimming and eddy current are discussed.

The characterization of several prototype magnets for the superconducting super collider is reported. The 1.5-m long dipole magnet which were tested at the Fermi National Accelerator Laboratory are the DSA323, DSA329, DSA 330, DSA332, DSA333, DSA331, DSA334 and variants of the DSA232 and DSA329 models. The latter two were fabricated using different conductor insulators and coil winding materials. The test results presented correlate the magnet's performance to design parameters and subsequent changes.

Measurements of ac losses have been carried out at the Fermi National Accelerator Laboratory on six prototype and 18 full-size dipole magnets of the superconducting super collider. The tests employed a microcomputer-based measurement system. It quantified the energy dissipation caused by eddy currents and iron core and superconductor magnetization as a function of ramp rate per operating cycle.

Variations in the magnetic field angles of dipole magnets for the superconducting super collider have been observed at the Fermi National Accelerator Laboratory. The changes were seen after measurements were made prior to and after the magnet's installation in the cryostat and before and after cold-tests. The field angle shifts due to cold tests were explained by fluctuations in yoke magnetization.