Tesla (unit)
Physical unit | |
---|---|
Unit name | Tesla |
Unit symbol | |
Physical quantity (s) | Magnetic flux density |
Formula symbol | |
dimension | |
system | International system of units |
In SI units | |
In CGS units | |
Named after | Nikola Tesla |
Derived from | Weber , square meter |
See also: Gauss |
The tesla ( T ) is a derived SI unit of measurement for magnetic flux density . The unit was named after Nikola Tesla in 1960 at the Conférence Générale des Poids et Mesures (CGPM) in Paris .
Relationship with CGS units
In the CGS system of units , which is still mainly used in theoretical physics , the corresponding unit is the Gauss (Gs or G):
Due to the different size systems , however, the difference between the two units is not just one factor (hence the sign ≙ ). The geophysics also used the unit Gamma (γ):
Size examples
Examples of different magnetic flux densities in nature and in technology:
Magnetic flux density in Tesla |
example |
---|---|
10 −10 to 10 −8 | Magnetic fields in the interstellar medium and around galaxies |
5 · 10 −5 | Earth's magnetic field in Germany |
10 −4 | Permissible limit value for electromagnetic fields at 50 Hz (household electricity) in Germany according to the 26th BImSchV |
0.002 | At a distance of 1 cm from a 100 A current, e.g. B. Battery current when starting a car, see Ampère's law |
0.1 | Commercially available horseshoe magnet |
0.25 | A typical sunspot |
1.61 | Maximum flux density of a NdFeB magnet (neodymium-iron-boron). Typically, the magnets are manufactured with flux densities between 1 T and 1.5 T. NdFeB magnets are currently the strongest permanent magnets |
2.45 | Saturation polarization of Fe 65 Co 35 , the highest value of a material at room temperature. |
0.35 to 3.0 | Magnetic resonance tomograph for use on humans. Devices with 7.0 T and more are also used for research purposes |
8.6 | Superconducting dipole magnets of the Large Hadron Collider at CERN in operation |
25.9 | Currently the strongest superconducting magnet in NMR spectroscopy (1.1 GHz spectrometer) |
32 | Strongest magnet based on (high temperature) superconductors |
45.5 | The most powerful permanent electromagnet, hybrid of superconducting and conventional electromagnets |
100 | Pulse coil - highest flux density without destroying the copper coil, generated for a few milliseconds |
1200 | Highest flux density generated by electromagnetic flux compression (controlled destruction of the arrangement, in the laboratory) |
2800 | Highest flux density generated by explosively driven flux compression (outdoors) |
10 6 to 10 8 | Magnetic field on a neutron star |
10 8 to 10 11 | Magnetic field on a magnetar |
Web links
Wiktionary: Tesla - explanations of meanings, word origins, synonyms, translations
Individual evidence
- ^ Resolution 12 of the 11th CGPM (1960). In: bipm.org. Bureau International des Poids et Mesures, accessed on August 16, 2019 . The name was proposed by the International Committee (CIPM) in 1956 (Resolution 3, see - Minutes of the meeting, page 83)
- ↑ see e.g. B. Magnetic fields in spiral galaxies @ mpg.de 2014 (PDF 1.4 MB); "There are theories that the intergalactic medium is filled with magnetic fields, but they must be much weaker than the galactic fields", Cosmic Magnetic Fields. Unexpected order in space Ruhr-Universität Bochum 2018, accessed November 8, 2018
- ↑ LHC dipole magnet functional principle. Retrieved August 4, 2011 .
- ↑ Heinz M. Hiersig (Ed.): Lexicon of engineering knowledge basics . Springer, 2013, ISBN 978-3-642-95765-9 , pp. 242 ( limited preview in Google Book search).
- ↑ CERN FAQ - LHC the guide. (PDF; 27.0 MB) February 2009, accessed on August 22, 2010 (English).
- ^ Bruker Corporation: Bruker Announces World's First Superconducting 1.1 Gigahertz Magnet for High-Resolution NMR in Structural Biology. Retrieved May 6, 2019 .
- ↑ Ascend 1.1 GHz. Retrieved May 6, 2019 .
- ^ Message in Magnetics
- ↑ David C. Larbalestier et al .: 45.5-tesla direct-current magnetic field generated with a high-temperature superconducting magnet . In: Nature . No. 570 , June 12, 2019, p. 496-499 , doi : 10.1038 / s41586-019-1293-1 (English).
- ↑ Strongest non-destructive magnetic field: world record set at 100-tesla level. In: lanl.gov. Los Alamos National Laboratory , March 22, 2012, archived from the original on July 19, 2014 ; accessed on November 12, 2019 .
- ↑ D. Nakamura, A. Ikeda, H. Sawabe, YH Matsuda, S. Takeyama: Record indoor magnetic field of 1200 T generated by electromagnetic flux compression . In: Review of Scientific Instruments . tape 89 , 2018, p. 095106 , doi : 10.1063 / 1.5044557 .
- ↑ AI Bykov, MI Dolotenko, NP Kolokolchikov, VD Selemir, OM Tatsenko: VNIIEF achievements on ultra-high magnetic fields generation . In: Physica B: Condensed Matter . tape 294-295 , 2001, pp. 574-578 , doi : 10.1016 / s0921-4526 (00) 00723-7 .