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Alfvén Critical Surface
Alfvén may refer to: People * Hannes Alfvén (1908–1995), Swedish plasma physicist and Nobel Prize in Physics laureate * Hugo Alfvén (1872–1960), Swedish composer, conductor, violinist, and painter * Marie Triepcke Krøyer Alfvén (1867–1940), commonly known as Marie Krøyer, Danish painter, wife of Hugo Other * Alfvén wave In plasma physics, an Alfvén wave, named after Hannes Alfvén, is a type of plasma wave in which ions oscillate in response to a restoring force provided by an Magnetic tension force, effective tension on the magnetic field lines. Definition ..., a type of magnetohydrodynamic wave, named after Hannes Alfvén * 1778 Alfvén, an asteroid discovered in 1960, named after Hannes Alfvén {{disambig, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hannes Alfvén
Hannes Olof Gösta Alfvén (; 30 May 1908 – 2 April 1995) was a Swedish electrical engineer, plasma physicist and winner of the 1970 Nobel Prize in Physics for his work on magnetohydrodynamics (MHD). He described the class of MHD waves now known as Alfvén waves. He was originally trained as an electrical power engineer and later moved to research and teaching in the fields of plasma physics and electrical engineering. Alfvén made many contributions to plasma physics, including theories describing the behavior of aurorae, the Van Allen radiation belts, the effect of magnetic storms on the Earth's magnetic field, the terrestrial magnetosphere, and the dynamics of plasmas in the Milky Way galaxy. Education Alfvén received his PhD from the University of Uppsala in 1934. His thesis was titled "Investigations of High-frequency Electromagnetic Waves." Early years In 1934, Alfvén taught physics at both the University of Uppsala and the Nobel Institute for Physics (lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hugo Alfvén
Hugo Emil Alfvén (; 1 May 18728 May 1960) was a Swedish composer, conductor, violinist, and painter. Alfvén was one of Sweden's principal composers. His "Swedish Rhapsody”, written when he was 31, is still one of the best-known pieces of Swedish music. After extensive European travels to develop his musical skills, Alfvén taught composition, before conducting choirs and orchestras. In 1954, he made the first Swedish classical stereo recordings. Hugo Alfvén’s extensive musical archive is held at Uppsala University, where he was music director for twenty-nine years. Career Violinist Alfvén was born in Stockholm, Sweden, and studied at the Royal College of Music (Kungliga Musikhögskolan) from 1887 to 1891 with the violin as his main instrument while receiving lessons from Lars Zetterquist. He also took private composition lessons from Johan Lindegren, a leading counterpoint expert. At the same time he played the violin at the Royal Opera in Stockholm 1890-1892. Cond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marie Triepcke Krøyer Alfvén
Marie may refer to the following. People Given name * Marie (given name), including a list of people and fictional characters with the name ** List of people named Marie * Marie (Japanese given name) Surname * Jean Gabriel-Marie, French composer * Jean Gabriel Marie (1907–1970), his son, French romantic composer Arts, entertainment and media Film, television and stage * Marie (1980 TV series), ''Marie'' (1980 TV series), an American television show * Marie (1985 film), ''Marie'' (1985 film), an American biography of Marie Ragghianti * Marie (2020 film), ''Marie'' (2020 film), a documentary short about homebirths * Marie (talk show), ''Marie'' (talk show), hosted by Marie Osmond * Marie (TV pilot), ''Marie'' (TV pilot), a 1979 American pilot with Marie Osmond * ''Marie'', a 2009 ballet by Stanton Welch#Works, Stanton Welch Literature * Marie (novel), ''Marie'' (novel), by H. Rider Haggard, 1912 Music * ''Marie'', a 2008 EP by the Romance of Young Tigers * Marie (Cat Mother a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfvén Wave
In plasma physics, an Alfvén wave, named after Hannes Alfvén, is a type of plasma wave in which ions oscillate in response to a restoring force provided by an Magnetic tension force, effective tension on the magnetic field lines. Definition An Alfvén wave is a low-frequency (compared to the ion gyrofrequency) travelling oscillation of the ions and magnetic field in a Plasma (physics), plasma. The ion mass density provides the inertia and the magnetic field line tension provides the restoring force. Alfvén waves propagate in the direction of the magnetic field, and the motion of the ions and the perturbation of the magnetic field are transverse to the direction of propagation. However, Alfvén waves existing at oblique incidences will smoothly change into magnetosonic waves when the propagation is perpendicular to the magnetic field. Alfvén waves are Dispersion relation, dispersionless. Alfvén velocity The low-frequency relative permittivity \varepsilon of a magnetized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
