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- W2015304261 abstract "We have performed detailed SIMION simulations of ion behavior in micrometer-sized cylindrical ion traps (r0=1 µm). Simulations examined the effects of ion and neutral temperature, the pressure and nature of cooling gas, ion mass, trap voltage and frequency, space-charge, fabrication defects, and other parameters on the ability of micrometer-sized traps to store ions. At this size scale voltage and power limitations constrain trap operation to frequencies about 1 GHz and rf amplitudes of tens of volts. Correspondingly, the pseudopotential well depth of traps is shallow, and thermal energies contribute significantly to ion losses. Trapping efficiency falls off gradually as qz approaches 0.908, possibly complicating mass-selective trapping, ejection, or quantitation. Coulombic repulsion caused by multiple ions in a small-volume results in a trapping limit of a single ion per trap. If multiple ions are produced in a trap, all but one ion are ejected within a few microseconds. The remaining ion tends to have favorable trapping parameters and a lifetime about hundreds of microseconds; however, this lifetime is significantly shorter than it would have been in the absence of space-charge. Typical microfabrication defects affect ion trapping only minimally. We recently reported (IJMS 2004, 236, 91–104) on the construction of a massively parallel array of ion traps with dimensions of r0=1 µm. The relationship of the simulations to the expected performance of the microfabricated array is discussed." @default.
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- W2015304261 date "2006-03-01" @default.
- W2015304261 modified "2023-09-27" @default.
- W2015304261 title "Simulations of ion trapping in a micrometer-sized cylindrical ion trap" @default.
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- W2015304261 doi "https://doi.org/10.1016/j.jasms.2005.11.020" @default.
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