The Cluster Magnetic Field Investigation

As is shown, thermally assisted vortex motion can come into being in high-T c superconductors due to the applied temperature gradient. Its behavior strongly depends on the local and global microstructure of the samples, moreover on the temperature and magnetic field. Investigation of the density, size and intensity of the pinning centers of specimens leads to the conclusion that the higher homogeneity immediately weakens and the lower one strenghtens the pinning, thus the former promotes and the latter impedes the vortex motion. The non-equilibrium experimental technique together with a.c. susceptibility measurements render possible the direct determination of the velocity of vortices. Depending on the actual microstructural state of samples it has the values between 6 × 10-2 mm/s and 18 × 10-2 mm/s in the case of Y-Ba-Cu-O specimens investigated.

Download Full-text

The Double Star magnetic field investigation: Overview of instrument performance and initial results

Advances in Space Research ◽

10.1016/j.asr.2006.01.008 ◽

2006 ◽

Vol 38 (8) ◽

pp. 1828-1833 ◽

Cited By ~ 3

Author(s):

C. Carr ◽

P. Brown ◽

T.L. Zhang ◽

O. Aydogar ◽

W. Magnes ◽

...

Keyword(s):

Magnetic Field ◽

Field Investigation ◽

Double Star ◽

Instrument Performance ◽

Initial Results

Download Full-text

The Double Star magnetic field investigation: instrument design, performance and highlights of the first year's observations

Annales Geophysicae ◽

10.5194/angeo-23-2713-2005 ◽

2005 ◽

Vol 23 (8) ◽

pp. 2713-2732 ◽

Cited By ~ 98

Author(s):

C. Carr ◽

P. Brown ◽

T. L. Zhang ◽

J. Gloag ◽

T. Horbury ◽

...

Keyword(s):

Magnetic Field ◽

Field Investigation ◽

Field Vector ◽

Double Star ◽

First Year ◽

Solar Arrays ◽

Final Data ◽

Essential Parameter ◽

Orbiting Spacecraft ◽

The Magnetic Field

Abstract. One of the primary objectives of the Double Star mission is the accurate measurement of the magnetic field vector along the orbits of the two spacecraft. The magnetic field is an essential parameter for the understanding of space plasma processes and is also required for the effective interpretation of data from the other instruments on the spacecraft. We present the design of the magnetic field instrument onboard both of the Double Star spacecraft and an overview of the performance as measured first on-ground and then in-orbit. We also report the results of in-flight calibration of the magnetometers, and the processing methods employed to produce the final data products which are provided to Double Star investigators, and the wider community in general. Particular attention is paid to the techniques developed for removing magnetic interference generated by the solar arrays on the first (equatorial orbiting) spacecraft. Results from the first year of operations are reviewed in the context of combined observations by Double Star and Cluster, and examples given from the different regions visited by the spacecraft to date.

Download Full-text