Systems and methods for reducing the kinetic energy spread of ions radially ejected from a linear ion trap
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United States of America Patent
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Jan 9, 2018
Grant Date -
Nov 30, 2017
app pub date -
May 26, 2016
filing date -
May 26, 2016
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Abstract
A system for analyzing a sample includes a linear ion trap, an insert DC electrode, a voltage controller, and an RF control circuitry. The linear ion trap includes a first pair of trap electrodes and a second pair of trap electrodes spaced apart from each other and surrounding a trap interior. An electrode of the second pair of trap electrodes includes a trap exit. The insert DC electrode is positioned adjacent to the trap exit. The voltage controller applies a DC voltage to the insert DC electrode. The RF control circuitry applies a main RF voltage to the first pair of trap electrodes, applies a portion of the main RF to the second pair of trap electrodes, increases the main RF applied to the first pair of trap electrodes, and applies an auxiliary RF voltage to the second pair of trap electrodes.
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