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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
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
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
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
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
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
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 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
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
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 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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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
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)
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
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
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
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
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)
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
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
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
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
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
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
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
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
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
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
Type of magnet
particles Quadrupole magnets are used to focus particle beams Sextupole magnets are used to correct for chromaticity introduced by quadrupole magnets The
Multipole_magnet
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
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
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
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
American scientist
University of Florida. He is best known for his work inventing the triple quadrupole mass spectrometer. Yost received his BS degree in chemistry in 1974 from
Richard_Yost
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
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
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
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
Device used in inductively coupled plasma mass spectrometry
before the traditional quadrupole chamber of an ICP-MS device, for eliminating isobaric interferences. The chamber has a quadrupole and can be filled with
Collision/reaction_cell
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
Pettifer, Robert F.; Collins, Stephen P.; Laundy, David (2009). "Quadrupole transitions revealed by Borrmann spectroscopy". Nature. 454 (7201): 196–199
Borrmann_effect
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
Topics referred to by the same term
RFQ is the initialism for a number of things: Radio-frequency quadrupole, a particular setup of electrodes used as a mass analyzer or an element of a linear
RFQ
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
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
Topics referred to by the same term
Quadrature mirror filter, a class of filters in digital signal processing Quadrupole mass filter, a type of mass spectrometer Quality management framework
QMF
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
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
for his work on spectroscopy, his role in the development of Nuclear Quadrupole Resonance (NQR), and his long association with the physics laboratories
Kotcherlakota_Rangadhama_Rao
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
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
Chemical compound
Tribromide and Its Molecular Complex with Benzene by Means of the 81Br Nuclear Quadrupole Resonance". Bulletin of the Chemical Society of Japan. 43 (8): 2398. doi:10
Antimony_tribromide
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
is the quadrupole-quadrupole-quadrupole (Q-Q-Q) analyzer. The first quadrupole separates by mass, collisions take place in the second quadrupole, and the
Two-dimensional chromatography
Two-dimensional_chromatography
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
Chemical data page
The Microwave Spectra, Structure, Dipole Moment, and Chlorine Nuclear Quadrupole Coupling Constants of Methylene Chloride Rollie J. Myers and William D
Dichloromethane_(data_page)
Invariant in quantum mechanics
(momentum-dependent phase shift). This approach simplifies problems such as the Quadrupole ion trap, where an ion is trapped in a harmonic potential with time dependent
Ermakov–Lewis_invariant
Soviet-born Canadian scientist
promoted the Dynamic Reaction Cell®, which remains today at the pinnacle of quadrupole ICP-MS technology. In 2005, together with Scott D. Tanner and Dmitry Bandura
Vladimir_Baranov
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
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
Chemical element with atomic number 112 (Cn)
trajectory within the detector and the beam focusing apparatus changes because of a dipole magnet in the former and quadrupole magnets in the latter.
Copernicium
Collapsed core of a massive star
state but can also be astronomically observed: the moment of inertia, the quadrupole moment, and the Love number. The moment of inertia of a neutron star describes
Neutron_star
Second order linear differential equation featuring a periodic function
the Hill equation appears in many settings including in modeling of a quadrupole mass spectrometer, as the one-dimensional Schrödinger equation of an electron
Hill_differential_equation
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
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
work in mass spectrometry and he is one of the inventors of the triple quadrupole mass spectrometer. "Professor Jim Morrison, Physical chemist". Interviews
Jim_Morrison_(chemist)
Accelerator in Darmstadt, Germany
branch consists of two ion source terminals followed by a Radio Frequency Quadrupole and by an Interdigital linac IH linac accelerator resonating at 36 MHz
Universal_linear_accelerator
nature, this technique is most effective—and therefore most common—on quadrupole mass spectrometers, Orbitrap, and Fourier transform ion cyclotron resonance
Selected_ion_monitoring
Chemical compound
2-Benzylbenzimidazole Nitazene Analogs by Liquid Chromatography-Tandem Quadrupole Mass Spectrometry (LC-QQQ-MS)". Journal of Analytical Toxicology. 46 (3):
Protonitazene
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
A radio-frequency quadrupole (RFQ) beam cooler is a device for particle beam cooling, especially suited for ion beams. It lowers the temperature of a particle
RFQ_beam_cooler
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
Benzodiazepine drug
designer benzodiazepine cloniprazepam using liquid chromatography coupled to quadrupole time-of-flight mass spectrometry". Journal of Pharmaceutical and Biomedical
Cloniprazepam
Chemical element with atomic number 104 (Rf)
trajectory within the detector and the beam focusing apparatus changes because of a dipole magnet in the former and quadrupole magnets in the latter.
Rutherfordium
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
Synchrotron radiation facility at Lund University in Sweden
closed in 2015. MAX I, II, and III all had dipole bending magnets and quadrupole and sextupole focusing magnets. R1 has that too but integrated as in MAX
MAX_IV_Laboratory
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
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
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Boy/Male
Hindu, Indian
God of Peace
Boy/Male
Sikh
Gurus treasure
Girl/Female
Hindu, Indian
India
Surname or Lastname
English
English : patronymic from Elkin 1.
Surname or Lastname
English and Scottish
English and Scottish : variant of Trotter 1.South German : metonymic variant of Trotter 2.
Boy/Male
Gaelic
Boy/Male
Hindu
Zealous
Boy/Male
Hindu, Indian, Marathi
Very Handsome
Surname or Lastname
English
English : habitational name from any of various minor places, for example in Staffordshire, so named from Old English grēne ‘green’ + lēah ‘woodland clearing’.
Surname or Lastname
English (mainly East Midlands)
English (mainly East Midlands) : habitational name from a lost minor place name, Pophall in Linchmere, Sussex, or from Pophills in Salford Priors, Warwickshire.
QUADRUPOLE
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