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An ion trap, used for precision measurements of radium ions, inside a vacuum chamber. View ports surrounding the chamber allow laser light to be directed into the trap. An ion trap is a combination of electric and/or magnetic fields used to capture charged particles — known as ions — often in a
The electric field E (blue) is generated by a quadrupole of endcaps (a, positive) and a ring electrode (b). Picture 1 and 2 show two states during an AC cycle. In experimental physics, a quadrupole ion trap or paul trap is a type of ion trap that uses dynamic electric fields to trap charged particles.
Furthermore, the total number of ions that can be stored in a 3D ion trap is limited by space charge effects. Combining a linear trap with a 3D trap can help overcome these limitations. [1] Recently, Hardman and Makarov have described the use of a linear quadrupole trap to store ions formed by ESI for injection into an orbitrap mass analyzer.
A top hat, also known as a stove pipe or snoot, is a device used in theatrical lighting to shield the audience's eyes from the direct source of the light. [1] It is shaped like a top hat with a hole in the top, and the brim being inserted into the gel frame holder on a lighting instrument.
The RFQ trap is used convert the radioactive ion beam delivered by the ISOLDE facility into low-energy ion pulses, before it is injected into the MR-ToF mass spectrometer. [5] It does this by electrostatically decelerating the ions and then passing them through a buffer-gas -filled environment. [ 6 ]
A sector instrument can be combined with a collision quadrupole and quadrupole mass analyzer to form a hybrid instrument. [1] A BEqQ configuration with a magnetic sector (B), electric sector (E), collision quadrupole (q) and m/z selection quadrupole (Q) have been constructed [2] [3] and an instrument with two electric sectors (BEEQ) has been described.
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Other forms of digital ion trap were also developed, including the linear ion trap constructed using printed circuit boards [30] and the rods structure linear ion guide/trap. [31] [23] Two sets of switch circuitry were normally used to generate 2 phases of rectangular pulse waveform for two pairs of rods in case of the linear digital ion trap.