Look up: quadrupole

1. 
   quadrupole
   a type of aerodynamic noise depending on the eighth power of the flow velocity.It is exemplified by noise deriving from the turbulent mixing that occurs in a wake or in the free exhaust of a jet Category: Physics • spectrometer in which ions pass along a line of symmetry between four parallel cylindrical rods. An alternating potential superimposed on a steady potential between pairs of...
   Found on http://www.mijnwoordenboek.nl/definition
   
   
2. 
   Quadrupole
   A `quadrupole` is one of a sequence of configurations of ` for example ` electric charge or current, or gravitational mass that can exist in ideal form, but it is usually just part of a multipole expansion of a more complex structure reflecting various orders of complexity.
   Found on http://en.wikipedia.org/wiki/Quadrupole
   
   
3. 
   quadrupole
   (from the article `magnetic resonance`) For certain nuclei, the NMR spectrum reveals the existence of nuclear electric quadrupole moments (an electric quadrupole consists of a charge ... ...there is no parity change, the transition is magnetic dipole (M1) and is analogous to the radiation of a full-wave loop antenna. With two units of ....
   Found on http://www.britannica.com/eb/a-z/q/3
   
   
4. 
   Quadrupole
   A magnet consisting of four poles ('quadrupole'), used for focusing beams of particles.
   Found on http://www-bdnew.fnal.gov/operations/acc
   
   
5. 
   Quadrupole
   A magnet having four poles which serves to focus the proton beam in one plane. A focussing quadrupole serves to focus in the horizontal plane while a defocussing one focuses in the vertical plane.
   Found on http://www-bdnew.fnal.gov/operations/acc
   
   
6. 
   Quadrupole
   A magnet consisting of four poles ('quadrupole'), used for focusing beams of particles.
   Found on http://www-bdnew.fnal.gov/operations/acc
   
   
7. 
   Quadrupole
   A magnet having four poles which serves to focus the proton beam in one plane. A focussing quadrupole serves to focus in the horizontal plane while a defocussing one focuses in the vertical plane.
   Found on http://www-bdnew.fnal.gov/operations/acc