Magnetization-vector ({rvec M}) measurements were made on a thin disk of impure Nb rotated relative to a fixed field {rvec H} at 4.2 K. For all H, {rvec M} is found to be separable into a non-rotating diamagnetic component {rvec M}{sub d} plus a penetrating-flux component {rvec M}{sub p} that turns rigidly with the sample for small rotation angles. For H below H{sub c1} on a hysteresis loop, {rvec M}{sub p} diminishes in size but continues to rotate rigidly up to 360{degree}. For H between H{sub c1} and H{sub c2}, {rvec M}{sub p} rotates up to and then remains at some critical angle, indicating a constant frictional torque between {rvec M}{sub p} and the sample, which presumably arises from vortex-flux jumps between pinning centers. Moreover, {rvec M}{sub d} closely equals {minus}{rvec H}/4{pi} for H above as well as below H{sub c1}. 6 refs., 3 figs.

A series of six workshops was held in 1986 and 1987 to compare eddy current codes, using six benchmark problems. The problems included transient and steady-state ac magnetic fields, close and far boundary conditions, magnetic and non-magnetic materials. All the problems were based either on experiments or on geometries that can be solved analytically. The workshops and solutions to the problems are described. Results show that many different methods and formulations give satisfactory solutions, and that in many cases reduced dimensionality or coarse discretization can give acceptable results while reducing the computer time required. A second two-year series of TEAM (Testing Electromagnetic Analysis Methods) workshops, using six more problems, is underway. 12 refs., 15 figs., 4 tabs.

This thesis describes the measurement of multiplicities and differential cross-sections of the /rho//sup 0/, K*/sup 0/, and /phi/ in e/sup +/e/sup -/ annihilation at ..sqrt..s = 29 GeV, using data collected by the TPC/2..gamma.. Detector Facility at PEP. The number of vector mesons per event is determined to be N(/rho//sup 0/) = 0.77 +- 0.08 +- 0.15, N(K*/sup 0/ + /bar K/*/sup 0/) = 0.58 +- 0.05 +- 0.11, and N(/phi/) = 0.076 +- 0.010 +- 0.012. These multiplicities are used to find that the ratio of strange quarks to up quarks produced in the hadronization process is 0.30 +- 0.07, and that the ratio of light vector mesons to all light mesons produced in the hadronization process is 0.45 +- 0.08. All results agree with previous measurements. Measurements are compared with predictions of the Lund and Webber hadronization models, neither model is particularly favored nor disfavored. 60 refs., 32 figs., 24 tabs.