Zobrazeno 1 - 10
of 77
pro vyhledávání: '"R. H. Koch"'
Publikováno v:
Physical Review B. 62:9143-9147
Publikováno v:
IEEE Transactions on Magnetics. 36:2052-2056
A model is presented describing the dynamic response of a single-domain fluxgate magnetometer over a wide range of operating conditions in terms of a single measurement of a hysteresis loop or the permeability of the fluxgate's ferromagnetic core. Th
Autor:
R. H. Koch, P. J. M. Wöltgens
Publikováno v:
Review of Scientific Instruments. 71:1529-1533
Measurements of the magnetic field noise and the spatial correlation of the noise were made in a typical laboratory environment using two three-axis fluxgate magnetometers. The magnitude of the magnetic field noise was found to be approximately 100 p
Autor:
W. J. Goss, D.K. Lathrop, T. Picunko, D. Gambrel, P. J. M. Wöltgens, D. Overway, R. Wiegert, R. H. Koch, J. R. Rozen
Publikováno v:
Review of Scientific Instruments. 67:2968-2976
A dc superconducting quantum interference device (SQUID) modulation and feedback circuit operating at a modulation frequency of 16 MHz has been constructed. Using a novel wide band superconducting thin film transformer to impedance match the SQUID to
Publikováno v:
Review of Scientific Instruments. 67:230-235
We have constructed a portable magnetic field gradiometer from fluxgate magnetometers using a novel common‐mode rejection method. The sensor, known as a room temperature Three Sensor Gradiometer (rtTSG), is, as far as we know, the first hand‐held
Autor:
A. Yamasaki, T. J. Herczeg, G. Hill, M. Rodonò, R. W. Hilditch, R. H. Koch, J. C. Raymond, G. E. McCluskey, R. S. Polidan, B. Geldzahler, A. Gimenez, A. P. Boss, E. F. Guinan, P. Szkody, S. Starrfield, R. F. Webbink
Publikováno v:
Transactions of the International Astronomical Union. 22:463-488
Publikováno v:
IEEE Transactions on Applied Superconductivity. 3:2426-2429
High-quality YBa/sub 2/Cu/sub 3/O/sub 7/ DC-SQUIDs (superconducting quantum interference devices) fabricated on bicrystal (Y)ZrO/sub 2/ substrates have been operated at temperatures from 10 K to the critical temperature at 89 K. Stable operation with
Publikováno v:
Symposium - International Astronomical Union. 151:255-264
Publikováno v:
Scopus-Elsevier
The low frequency electrical noise has been studied in Fe3O4 films as a function of temperature and in a frequency range from 0.1 to 100 Hz. At room temperature, Hooge’s coefficient is around 80, at least three orders of magnitude greater than norm
Autor:
G. Grinstein, R. H. Koch
Publikováno v:
Physical review. E, Statistical, nonlinear, and soft matter physics. 72(4 Pt 2)
In the standard Arrhenius picture [S. Arrhenius, Z. Phys. Chem., Stoechiom. Verwandtschaftsl. 4, 226 (1889); L. N\'eel, Ann. Geophys. (C.N.R.S.) 5, 99 (1949)] of thermal switching or escape from a metastable to a stable state, the escape probability