Charged particle traps II: Applications by Günther Werth, Viorica N. Gheorghe, Visit Amazon's F. G.

By Günther Werth, Viorica N. Gheorghe, Visit Amazon's F. G. Major Page, search results, Learn about Author Central, F. G. Major,

This, the second one quantity of Charged Particle Traps, is dedicated to functions, complementing the 1st volume’s finished remedy of the speculation and perform of charged particle traps, their many variations and refinements. in recent times, functions of a ways achieving value have emerged starting from the ultra-precise mass determinations of ordinary debris and their antiparticles and short-lived isotopes, to high-resolution Zeeman spectroscopy on multiply-charged ions, to microwave and optical spectroscopy, a few regarding "forbidden" transitions from metastable states of such excessive solution that optical frequency criteria are learned via locking lasers to them. extra the capability software of trapped ions to quantum computing is explored, in accordance with the intense quantum nation coherence made attainable by way of the particle isolation. attention is given to the Paul and Penning traps as capability quantum details processors.

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1. Required resolving power for different applications [33] Application δM/M General physics and chemistry <10−5 – separation of isobars Nuclear structure physics 10−6 Astrophysics <10−6 – separation of isomers Weak interaction studies ≤10−8 Metrology – fundamental constants <10−9 CPS Tests <10−10 QED in highly-charged ions <10−11 – separation of atomic states Required resolving power 104 105 106 107 108 109 1010 Since the different types of spectrometers have inherent advantages and disadvantages, the requirements of the particular application clearly determines the instrument to be used.

When different ions are simultaneously confined signals appear at different values of the modulated trapping voltage. The ˜ of the resonance sensitivity of the method depends on the quality factor Q ˜ circuit. With moderate values of the order of Q = 50 about 1,000 trapped ions lead to an observable signal. Bolometric detection. In the bolometric detection of trapped ions, first proposed and realised by Dehmelt and co-workers [34–36] the ions are kept in resonance with a tuned LC circuit connected to the trap electrodes in a way similar to what was discussed in the previous section.

In Fig. 4 are sketched typical lines in the first stable region in the a − q plane of the quadrupole field along which resonances occur due to hexapole term (βz = 2/3) and octopole term (βr + βz = 1 and βz = 1/2). 46 2 Mass Spectrometry Using Paul Traps Fig. 4. 5 Quadrupole Time-of-Flight Spectrometer By combining the Paul quadrupole trap with a time-of-flight mass analyzer the mass selective ion accumulation and cooling capabilities of the trap as an ion source are retained while providing good spectral resolution over a wide range and linear particle counting through time-of-flight analysis.

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