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Arrangement that creates a quadrupole field of some sort
A quadrupole or quadrapole is one of a sequence of configurations of things like electric charge or current, magnetic fields, or gravitational mass that
Quadrupole
Analytical technique based on determining mass to charge ratio of ions
mass spectrometers. The quadrupole mass filter is closely related to the quadrupole ion trap, particularly the linear quadrupole ion trap except that it
Mass_spectrometry
Group of four magnets
Quadrupole magnets consist of a group of four magnets laid out so that in the planar multipole expansion of the field, the dipole terms cancel and where
Quadrupole_magnet
Type of mass spectrometer
In mass spectrometry, the quadrupole mass analyzer (or quadrupole mass filter) is a type of mass analyzer originally conceived by Nobel laureate Wolfgang
Quadrupole_mass_analyzer
Formula in general relativity
relativity, the quadrupole formula describes the gravitational waves that are emitted from a system of masses in terms of the (mass) quadrupole moment. The
Quadrupole_formula
Quadrupole splitting is an example of a hyperfine interaction found in gamma-ray spectroscopy, in the circumstance where nuclei with a non-radially-symmetric
Quadrupole_splitting
Type of mass spectrometer
A triple quadrupole mass spectrometer (TQMS), is a tandem mass spectrometer consisting of two quadrupole mass analyzers in series, with a (non-mass-resolving)
Triple quadrupole mass spectrometer
Triple_quadrupole_mass_spectrometer
Type of mass spectrometry
instrumentation setups include triple quadrupole mass spectrometer (QqQ), multi-sector mass spectrometer, ion trap, quadrupole–time of flight (Q-TOF), Fourier
Tandem_mass_spectrometry
Chemical analysis technique
Nuclear quadrupole resonance spectroscopy or NQR is a chemical analysis technique related to nuclear magnetic resonance (NMR). Unlike NMR, NQR transitions
Nuclear_quadrupole_resonance
Spectroscopic technique
electron densities (also called the chemical shift in older literature), quadrupole splitting due to atomic-scale electric field gradients; and magnetic splitting
Mössbauer_spectroscopy
described. A triple quadrupole mass spectrometer with the final quadrupole replaced by a time-of-flight device is known as a quadrupole time-of-flight instrument
Hybrid_mass_spectrometer
Device for trapping charged particles
to trap ions without magnetic fields that was based on his work with quadrupole mass spectrometers. Ion traps were used in television receivers prior
Ion_trap
Two circular coil device which creates a homogeneous magnetic field
A Helmholtz coil is a device for producing a region of nearly uniform magnetic field, named after the German physicist Hermann von Helmholtz. It consists
Helmholtz_coil
American instrument company
TQ-S micro 2016 Triple quadrupole Xevo TQD 2016 Triple quadrupole Xevo TQ-S 2014 Triple quadrupole SYNAPT G2-Si 2013 Quadrupole Time-of-Flight Ion-mobility
Waters_Corporation
Noncovalent molecular interaction
is an example of noncovalent bonding between a monopole (cation) and a quadrupole (π system). Bonding energies are significant, with solution-phase values
Cation–π_interaction
Device for focusing charged particles
or rectangular tubes in series along an axis. The quadrupole lens consists of two single quadrupoles turned 90° with respect to each other. Let z be the
Electrostatic_lens
Solid consisting of discrete molecules
molecules together are van der Waals forces, dipole–dipole interactions, quadrupole interactions, π–π interactions, hydrogen bonding, halogen bonding, London
Molecular_solid
Linear accelerator component
A radio-frequency quadrupole (RFQ) is a linear accelerator component generally used at low beam energies, roughly 2 keV to 3 MeV. It is similar in layout
Radio-frequency_quadrupole
Converging particle beams using alternating field gradients
direction. However, iron "poles" of a cyclotron or two or more spaced quadrupole magnets (arranged in quadrature) can alternately focus horizontally and
Strong_focusing
High-frequency collective excitation of atomic nuclei
dipole resonance (GDR) in photonuclear reactions, and in 1972 the giant quadrupole resonance (GQR) was discovered, and in 1977 the giant monopole resonance
Giant_resonance
Radiation description framework
Electric quadrupole ( x , t ) = − i c k 3 24 π e i k r − i ω t r n × Q ( n ) E Electric quadrupole ( x , t ) = Z 0 ( H Electric quadrupole × n ) {\displaystyle
Multipole_radiation
Type of structure in atomic physics
field generated by the electrons and the energy of the nuclear electric quadrupole moment in the electric field gradient due to the distribution of charge
Hyperfine_structure
Analytical method
matrix background. The first quadrupole (Q1) is connected with a collision cell (Q2) and another quadrupole (Q3). Both quadrupoles can be used in scanning
Gas chromatography–mass spectrometry
Gas_chromatography–mass_spectrometry
Compound containing rings with delocalized pi electrons
enjoys favorable quadrupole/quadrupole interactions, as the positive quadrupole of one benzene ring interacts with the negative quadrupole of the other.
Aromatic_compound
Mass spectrometry technique to induce fragmentation of selected ions in the gas phase
fragmentation in peptides. In a triple quadrupole mass spectrometer there are three quadrupoles. The first quadrupole termed "Q1" can act as a mass filter
Collision-induced dissociation
Collision-induced_dissociation
Mass cytometry application to quantify labeled cell targets
generated from environmental air and biological molecules are removed using a quadrupole mass analyzer. The remaining heavy ions from the antibody tags are quantified
CyTOF
Topics referred to by the same term
production code QQQ Triple quadrupole mass spectrometer (QqQ), a mass spectrometer comprising three consecutive quadrupoles QQQ is the ticker symbol for
QQQ_(disambiguation)
Spectroscopy of quantized rotational states of gases
the nuclear quadrupole moment and a function of F and J. where F = J + I, J + I − 1, …, |J − I|. Thus, observation of nuclear quadrupole splitting permits
Rotational_spectroscopy
Higher-order interactions of magnetic moments of chemicals
1 + 1 {\displaystyle Y_{2}^{+2}=2Y_{1}^{+1}Y_{1}^{+1}} If so, a quadrupole-quadrupole interaction (see next section) can be considered as a two steps
Multipolar exchange interaction
Multipolar_exchange_interaction
quadrupole trap system to enhance ion-molecule reactions, thus it can be used to study spectroscopy of stored ions. The LIT uses a set of quadrupole rods
Linear_ion_trap
Lens for charged particles
lens typically consists of several electromagnets arranged in a quadrupole (see quadrupole magnet), sextupole, or higher format; the electromagnetic coils
Magnetic_lens
Process of removing land mines
Explosives in landmines can also be detected directly using nuclear quadrupole resonance and neutron probes. Detection and removal of landmines is a
Demining
Class of drugs
2-Benzylbenzimidazole Nitazene Analogs by Liquid Chromatography-Tandem Quadrupole Mass Spectrometry (LC-QQQ-MS)". Journal of Analytical Toxicology. 46 (3):
Nitazenes
Unit of electric quadrupole moment
of electric quadrupole, named in honour of the chemical physicist A. David Buckingham who was the first to measure a molecular quadrupole moment. It is
Buckingham_(unit)
Method of mass spectrometry
detector. Quadrupole time-of-flight mass spectrometry (QToF-MS) has a similar configuration to a tandem mass spectrometer with a mass-resolving quadrupole and
Time-of-flight mass spectrometry
Time-of-flight_mass_spectrometry
opposing charges brought close together and a quadrupole to two dipoles brought together. A quadrupole field is shown in the lower figure on the right
Earth's_magnetic_field
Chemical bonding involving attraction between ions
objects of NQR nuclear quadrupole resonance and NMR nuclear magnetic resonance studies. Interactions between the nuclear quadrupole moments Q and the electric
Ionic_bonding
Particle accelerator at CERN, Switzerland
(see image), while an additional 392 quadrupole magnets are used to keep the beams focused, with stronger quadrupole magnets close to the intersection points
Large_Hadron_Collider
Nonlinear force experienced by a charged particle
thruster Quadrupole ion trap Terahertz time-domain spectroscopy as a source of high energy THz radiation in laser-induced air plasmas The quadrupole ion trap
Ponderomotive_force
Approximate solution to Einstein's field equations
approximation to the Kerr metric (which describes a rotating black hole) when the quadrupole moment is set as q = − a 2 a M 3 {\displaystyle q=-a^{2}aM^{3}} , which
Hartle–Thorne_metric
American electrical engineer (1927–2022)
commercial quadrupole mass spectrometer in 1964. He then formed Finnigan Instruments Corporation to combine a computer system with a quadrupole mass spectrometer
Robert_E._Finnigan
Mass spectrometer company and brand, now owned by Danaher
product, introduced in 1979, was the TAGA (Trace Atmospheric Gas Analyzer) quadrupole mass spectrometer system, which used atmospheric-pressure chemical ionization
SCIEX
reduces astigmatism of the beam by imposing a weak electric or magnetic quadrupole field on the electron beam. For early electron microscopes - between the
Stigmator
Measurand in NMR spectroscopy
called dipolar coupling), the chemical shift anisotropy, or the electric quadrupole interaction. The resulting so-called residual anisotropic magnetic interactions
Residual_dipolar_coupling
Property of a charged particle beam
vertical) can be obtained by varying the field strength of a quadrupole (or quadrupoles) upstream of a monitor (i.e., a wire or a screen). The properties
Beam_emittance
Device for storing charged particles
storage of charged particles using a homogeneous magnetic field and a quadrupole electric field. It is mostly found in the physical sciences and related
Penning_trap
Usage of mass spectrometry to measure remaining isotopes
of the magnetic sector type. This type of analyzer is superior to the quadrupole type in this field of research for two reasons. First, it can be set up
Isotope-ratio mass spectrometry
Isotope-ratio_mass_spectrometry
Techniques to control particle beam properties
cooling Laser cooling Radiation damping Buffer-gas cooling within RF quadrupoles Proceedings of Cern Accelerator School Workshop on Beam Cooling and related
Particle_beam_cooling
Organic compound that consists only of carbon, hydrogen, and oxygen
quadrupole (QqQ) instrument, which is set to detect a predetermined precursor ion in the first quadrupole, a fragmented in the collision quadrupole,
Carbohydrate
the direction of Robert E. Finnigan, the company developed the first quadrupole gas chromatography–mass spectrometry devices and sold over 500 devices
Electronic_Associates
Upgrade to the Large Hadron Collider at CERN
Production of the new inner triplet quadrupole magnets is ongoing. 2026: There will be a replacement of the existing quadrupole magnets at the end of the nominal
High Luminosity Large Hadron Collider
High_Luminosity_Large_Hadron_Collider
Aspect of relativity in physics
zero quadrupole moment) will not radiate, in agreement with Birkhoff's theorem. More technically, the second time derivative of the quadrupole moment
Gravitational_wave
American neo-Nazi (1933–2002)
1962. His doctorate thesis was entitled "Electrically Induced Nuclear Quadrupole Spin Transitions In A GaAs Single Crystal" and he studied under the physicist
William_Luther_Pierce
Velocity field as the gradient of a scalar function
{A}{r^{2}}}\sin 2\theta \,.} This is the flow field associated with a quadrupole. A line source or sink of strength Q {\displaystyle Q} ( Q > 0 {\displaystyle
Potential_flow
Unit for cross sectional area used in high-energy physics
a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of
Barn_(unit)
of the nucleus originated in 1939 in the spectroscopic analysis of the quadrupole moments while the prolate spheroid shape of the nucleon arises from analysis
Shape_of_the_atomic_nucleus
Magnetic moment of an atomic nucleus
the protons and neutrons. It is mainly a magnetic dipole moment; the quadrupole moment does cause some small shifts in the hyperfine structure as well
Nuclear_magnetic_moment
E. N. (1989). "Optical pumping technique for measuring small nuclear quadrupole shifts in 1S(0) atoms and testing spatial isotropy". Physical Review A
Hughes–Drever_experiment
American freestyle skier
performed the first quadruple somersault on skis. He did a triple twisting quadrupole back flip and did not wear a helmet. For nearly 20 years, no other skier
Frank_Bare_Jr.
Proposed quantum computer implementation
standards-meeting compact trapped-ion quantum computer. The electrodynamic quadrupole ion trap now used in trapped-ion quantum computing research was invented
Trapped-ion_quantum_computer
Academic journal
magnetic resonance imaging, magnetic resonance spectroscopy and nuclear quadrupole resonance. Since 2021, its editor-in-chief has been Tatyana Polenova of
Journal_of_Magnetic_Resonance
consisting of alternating focussing and defocussing quadrupoles, with one dipole following every quadrupole (i.e. two dipoles per repeating cell), giving a
Synchrotron_Radiation_Source
ICP-MS instrument, the SPECTROGREEN MS quadrupole mass spectrometer, marking the company’s entry into quadrupole mass spectrometry for ultra-trace elemental
SPECTRO Analytical Instruments
SPECTRO_Analytical_Instruments
Chemical element with atomic number 115 (Mc)
trajectory within the detector and the beam focusing apparatus changes because of a dipole magnet in the former and quadrupole magnets in the latter.
Moscovium
Pettifer, Robert F.; Collins, Stephen P.; Laundy, David (2009). "Quadrupole transitions revealed by Borrmann spectroscopy". Nature. 454 (7201): 196–199
Borrmann_effect
Chemical element with atomic number 7 (N)
theoretically usable, has an integer nuclear spin of one and thus has a quadrupole moment that leads to wider and less useful spectra. 15N NMR nevertheless
Nitrogen
Topics referred to by the same term
glazing, a type of insulated glazing Quadrupel, a strong beer Quadripole Quadrupole This disambiguation page lists articles associated with the title Quadruple
Quadruple
The quantum cylindrical quadrupole is a solution to the Schrödinger equation, i ℏ ∂ ∂ t ψ ( x , t ) = − ℏ 2 2 m ∂ 2 ∂ x 2 ψ ( x , t ) + V ( x ) ψ ( x
Quantum cylindrical quadrupole
Quantum_cylindrical_quadrupole
German physicist (1913–1993)
December 1993) was a German physicist, who co-developed the non-magnetic quadrupole mass filter which laid the foundation for what is now called an ion trap
Wolfgang_Paul
Technique used in mass spectroscopy
Fenn's first electrospray ionization source coupled to a single quadrupole mass spectrometer
Electrospray_ionization
Rate of change of the electric field at an atomic nucleus
distribution and the other nuclei. The EFG couples with the nuclear electric quadrupole moment of quadrupolar nuclei (those with spin quantum number greater than
Electric_field_gradient
Device for producing coherent EM waves in the sub-visible spectrum
ammonia nozzle is at left in the box, the four brass rods at center are the quadrupole state selector, and the resonant cavity is at right. The 24 GHz microwaves
Maser
Experimental nuclear physics technique
strong electric quadrupole transitions. Moreover, it is the only experimental method in nuclear physics that is sensitive to electric quadrupole moments of
Coulomb_excitation
Small mass spectrometer
and contamination monitoring in vacuum systems. When constructed as a quadrupole mass analyzer, there exist two implementations, utilizing either an open
Residual_gas_analyzer
Type of particle accelerator
focusing principle in the early 1950s led to the installation of focusing quadrupole magnets inside the drift tubes, allowing for longer and thus more powerful
Linear_particle_accelerator
Anomaly in cosmic microwave background
of the CMB is slightly cooler than the "bottom half"; furthermore, the quadrupole and octupole axes are only a few degrees apart, and these axes are aligned
Axis_of_evil_(cosmology)
Chemical element with atomic number 111 (Rg)
trajectory within the detector and the beam focusing apparatus changes because of a dipole magnet in the former and quadrupole magnets in the latter.
Roentgenium
Former proposed future hadron collider planned to be located at Fermilab
for a period of time the VLHC was planned to run at Stage-2, with the quadrupole magnets used for bending the beam being replaced by magnets that can reach
Very_Large_Hadron_Collider
CGS unit of electric dipole moment
corresponds closely to 0.3 D. Buckingham (unit) (CGS unit of electric quadrupole) Two equal and opposite charges separated by some distance constitute
Debye
Trace radiation from the early universe
directions create polarizations that cancel out. If the incoming radiation has quadrupole anisotropy, residual polarization will be seen. Other than the temperature
Cosmic_microwave_background
Particle collider in Tsukuba, Japan
approximately 40 times higher luminosity, due mostly to superconducting quadrupole focusing magnets. The accelerator achieved "first turns" (first circulation
SuperKEKB
Physicist and Professor
at the University of Oxford. Her doctoral research considered nuclear quadrupole interactions and fast ionic conductors. After earning her doctorate, Walker
Alison_Walker_(scientist)
Type of particle accelerator
accelerators have been built to store very-low-energy particles, and quadrupole fields may be used to store (uncharged) neutrons; these are comparatively
Storage_ring
Chemical element with atomic number 17 (Cl)
distribution and thus resonance broadening as a result of a nonzero nuclear quadrupole moment and resultant quadrupolar relaxation. The other chlorine isotopes
Chlorine
Soviet cosmic microwave background experiment on the Prognoz 9 satellite
measured the CMB dipole, the Galactic plane, and gave upper limits on the quadrupole moment. A follow-up, RELIKT-2, would have been launched around 1993, and
RELIKT-1
quadrupole term: E Q = ∑ i j Q i j V i j {\displaystyle E_{Q}=\sum _{ij}Q_{ij}V_{ij}} ij=1;2;3 This can be written as a product of the quadrupole
Perturbed_angular_correlation
Magnetic analogue of the electric dipole
a dipole with the same dipole moment. For higher-order sources (e.g. quadrupoles) with no dipole moment, their field decays towards zero with distance
Magnetic_dipole
Study of the structure and dynamics of the Sun through its oscillation
for Physics. Helioseismology also allowed accurate measurements of the quadrupole (and higher-order) moments of the Sun's gravitational potential, which
Helioseismology
Science fraudster
trap and ultra high performance liquid chromatography – ion mobility – quadrupole time of flight mass spectrometry". Drug Testing and Analysis. 7 (9): 835–842
Eliezer_Masliah
Liquid and/or gas trapped within a crystal
84-million-year-old air bubble lies trapped in amber (fossilized tree sap). Using a quadrupole mass spectrometer, scientists can learn what the atmosphere was like when
Fluid_inclusion
Measure of positive and negative charges
{\displaystyle {\tfrac {d}{R}}} (see Multipole expansion and Quadrupole § Electric quadrupole) expresses this potential as a series. V ( R ) = 1 4 π ε
Electric_dipole_moment
Scattering of an electromagnetic plane wave by a sphere
multipole expansion with n = 1 being the dipole term, n = 2 being the quadrupole term, and so forth. If the size of the particle is equal to several wavelengths
Mie_scattering
Chemical element with atomic number 114 (Fl)
trajectory within the detector and the beam focusing apparatus changes because of a dipole magnet in the former and quadrupole magnets in the latter.
Flerovium
British astronomer
R.D (1989). "The peculiar velocity of the Local Group.(III) – Dipole, quadrupole and infall solutions". MNRAS. 241 (4): 787–826. Bibcode:1989MNRAS.241
Rod_Davies
nature, this technique is most effective—and therefore most common—on quadrupole mass spectrometers, Orbitrap, and Fourier transform ion cyclotron resonance
Selected_ion_monitoring
Component
lattice' required to bend, steer and focus a charged particle beam. The quadrupole magnets used to focus and combine the beam have the unfortunate property
Sextupole_magnet
Surface chemical analysis and imaging method
1970s, K. Wittmaack and C. Magee developed SIMS instruments equipped with quadrupole mass analyzers. Around the same time, A. Benninghoven introduced the method
Secondary-ion mass spectrometry
Secondary-ion_mass_spectrometry
Scientific analytical tool
The digital ion trap (DIT) is an quadrupole ion trap driven by digital signals, typically in a rectangular waveform, generated by switching rapidly between
Digital_ion_trap
distortion, inverted pendulum, stability of a floating body, radio frequency quadrupole, and vibration in a medium with modulated density" This is a wide family
Mathieu_wavelet
American scientific instrument manufacturer
lines: ICPMS systems, laboratory gas chromatography (GC), and GC-triple quadrupole mass spectrometer (originally designed by Bear Instruments and acquired
Bruker
QUADRUPOLE
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Boy/Male
Tamil
Cloud
Girl/Female
Indian
Boy/Male
Gujarati, Hindu, Indian, Jain, Kannada, Malayalam, Marathi, Oriya, Tamil, Telugu
Clever; Skilled
Boy/Male
Indian, Punjabi, Sikh
Victory of Good Company
Boy/Male
Tamil
Mahendar | மஹேநà¯à®¤à®°
Girl/Female
Latin
Beautiful golden child.
Female
Native American
Native American Algonquin name PULES means "pigeon."
Female
English
 Anglicized form of Irish Gaelic Sadhbh, SABINA means "sweet." Compare with another form of Sabina.
Boy/Male
Arabic, Muslim
Father of Mankind; An Epithet of Adam who was also the First Prophet
Boy/Male
English
Famous Russian Poet
QUADRUPOLE
QUADRUPOLE
QUADRUPOLE
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QUADRUPOLE