A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce stronger magnetic fields than all but the strongest non-superconducting electromagnets, and large superconducting magnets can be cheaper to operate because no energy is dissipated as heat in the windings. They are used in MRI instruments in hospitals, and in scientific equipment such as NMR spectrometers, mass spectrometers, fusion reactors and particle accelerators. They are also used for levitation, guidance and propulsion in a magnetic levitation (maglev) railway system being constructed in Japan.
A Bitter electromagnet or Bitter solenoid is a type of electromagnet invented in 1933 by American physicist Francis Bitter used in scientific research to create extremely strong magnetic fields. Bitter electromagnets have been used to achieve the strongest continuous manmade magnetic fields on earth―up to 45 teslas, as of 2011.
The tesla is the unit of magnetic flux density in the International System of Units (SI).
In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is the resonant frequency of an atomic nucleus relative to a standard in a magnetic field. Often the position and number of chemical shifts are diagnostic of the structure of a molecule. Chemical shifts are also used to describe signals in other forms of spectroscopy such as photoemission spectroscopy.
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique based on re-orientation of atomic nuclei with non-zero nuclear spins in an external magnetic field. This re-orientation occurs with absorption of electromagnetic radiation in the radio frequency region from roughly 4 to 900 MHz, which depends on the isotopic nature of the nucleus and increased proportionally to the strength of the external magnetic field. Notably, the resonance frequency of each NMR-active nucleus depends on its chemical environment. As a result, NMR spectra provide information about individual functional groups present in the sample, as well as about connections between nearby nuclei in the same molecule. As the NMR spectra are unique or highly characteristic to individual compounds and functional groups, NMR spectroscopy is one of the most important methods to identify molecular structures, particularly of organic compounds.
Nuclear magnetic resonance quantum computing (NMRQC) is one of the several proposed approaches for constructing a quantum computer, that uses the spin states of nuclei within molecules as qubits. The quantum states are probed through the nuclear magnetic resonances, allowing the system to be implemented as a variation of nuclear magnetic resonance spectroscopy. NMR differs from other implementations of quantum computers in that it uses an ensemble of systems, in this case molecules, rather than a single pure state.
Gregory Scott Boebinger was the director of the National High Magnetic Field Laboratory in Tallahassee, Florida, and is currently a professor of physics at Florida State University.
Naresh Dalal is a physical chemist who specializes in materials science. He is the Dirac Professor of Chemistry and Biochemistry at Florida State University, where he is affiliated with the National High Magnetic Field Laboratory.
This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude.
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are disturbed by a weak oscillating magnetic field and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus. This process occurs near resonance, when the oscillation frequency matches the intrinsic frequency of the nuclei, which depends on the strength of the static magnetic field, the chemical environment, and the magnetic properties of the isotope involved; in practical applications with static magnetic fields up to ca. 20 tesla, the frequency is similar to VHF and UHF television broadcasts (60–1000 MHz). NMR results from specific magnetic properties of certain atomic nuclei. High-resolution nuclear magnetic resonance spectroscopy is widely used to determine the structure of organic molecules in solution and study molecular physics and crystals as well as non-crystalline materials. NMR is also routinely used in advanced medical imaging techniques, such as in magnetic resonance imaging (MRI). The original application of NMR to condensed matter physics is nowadays mostly devoted to strongly correlated electron systems. It reveals large many-body couplings by fast broadband detection and should not be confused with solid state NMR, which aims at removing the effect of the same couplings by Magic Angle Spinning techniques.
The Dresden High Magnetic Field Laboratory in the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) focuses on modern materials research at high magnetic fields. It serves as a research facility for in-house as well as for user projects and provides research opportunities for pulsed magnetic fields up to 90 teslas for routine operation. A record field close to 95.6 T has been reached in 2011. The HLD aims at reaching magnetic fields up to the feasibility limit of about 100 teslas.
Robert Guy Griffin is a Professor of Chemistry and director of the Francis Bitter Magnet Laboratory at Massachusetts Institute of Technology (MIT). He is known for his work in nuclear magnetic resonance (NMR) and developing high-field dynamic nuclear polarisation (DNP) for the study of biological solids. He has contributed many different methods and approaches now widely used in solid-state NMR spectroscopy, in particular in context of magic-angle-spinning NMR. For example, this extends to methods for resolution enhancement via heteronuclear decoupling, as well as techniques for polarisation transfer between nuclei.
A Benchtop nuclear magnetic resonance spectrometer refers to a Fourier transform nuclear magnetic resonance (FT-NMR) spectrometer that is significantly more compact and portable than the conventional equivalents, such that it is portable and can reside on a laboratory benchtop. This convenience comes from using permanent magnets, which have a lower magnetic field and decreased sensitivity compared to the much larger and more expensive cryogen cooled superconducting NMR magnets. Instead of requiring dedicated infrastructure, rooms and extensive installations these benchtop instruments can be placed directly on the bench in a lab and moved as necessary. These spectrometers offer improved workflow, even for novice users, as they are simpler and easy to use. They differ from relaxometers in that they can be used to measure high resolution NMR spectra and are not limited to the determination of relaxation or diffusion parameters.
The Laboratoire National des Champs Magnétiques Intenses is a research institution of the CNRS. It is based at two sites: one in Grenoble, specialised in static fields, and one in Toulouse, specialised in pulsed fields. The LNCMI provides a base for research related to high-strength magnetic fields by both resident scientists and visiting researchers from around the world. It is one of the three founding members of the European Magnetic Field Laboratory (EMFL) officially created in 2014.
Geoffrey Bodenhausen is a French chemist specializing in nuclear magnetic resonance, being highly cited in his field. He is a Corresponding member of the Royal Netherlands Academy of Arts and Sciences and a Fellow of the American Physical Society. He is professeur émérite at the Department of Chemistry at the École Normale Supérieure (ENS) in Paris and professeur honoraire at the Laboratory of Biomolecular Magnetic Resonance of the École Polytechnique Fédérale de Lausanne (EPFL). He is a member of the editorial board of the journal Progress in Nuclear Magnetic Resonance Spectroscopy. He is the chair of the editorial board of the journal Magnetic Resonance.
Benjamin Lax was a solid-state and plasma physicist.
Lucio Frydman is an Israeli chemist whose research focuses on magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR) and solid-state NMR. He was awarded the 2000 Günther Laukien Prize, the 2013 Russell Varian Prize and the 2021 Ernst Prize. He is Professor and Head of the Department of Chemical and Biological Physics at the Weizmann Institute of Science in Israel and Chief Scientist in Chemistry and Biology at the US National High Magnetic Field Laboratory in Tallahassee, Florida. He is a fellow of the International Society of Magnetic Resonance and of the International Society of Magnetic Resonance in Medicine. He was the Editor-in-Chief of the Journal of Magnetic Resonance (2011-2021).
Malcolm Harris Levitt is a British physical chemist and nuclear magnetic resonance (NMR) spectroscopist. He is Professor in Physical Chemistry at the University of Southampton and was elected a Fellow of the Royal Society in 2007.
Vivien Zapf is an American research scientist at the National High Magnetic Field Laboratory pulsed field facility at Los Alamos National Laboratory.
Scott Crooker is a research scientist at the National High Magnetic Field Laboratory pulsed field facility at Los Alamos National Laboratory. He received his Ph.D. in physics from the University of California, Santa Barbara and his B.A. in physics from Cornell University. He is a Fellow of the Optical Society of America, a fellow of Los Alamos National Laboratory, a fellow of the American Association for the Advancement of Science and a fellow of the American Physical Society. He received a Los Alamos National Laboratory Fellow's Prize in 2007 for his outstanding research in the development of novel magneto-optical spectroscopies and their application to problems in solid state and atomic physics systems. In 2007 he also received a Los Alamos National Laboratory Outstanding Innovation Technology Transfer Award for a patent on multifunctional nanocrystals.
