Influence of External Electric Field on Ionization Efficiency and Organic Ions Energy Distribution in SALDI Method
- 1 мл. науч. сотрудник, Институт общей физики РАН им. А.М. Прохорова
- 2 к.ф.-м.н., ст. науч. сотрудник, ООО «Новые Энергетические Технологии»
Abstract
Influence of an external electrostatic field on desorption/ionization efficiency in SALDI method was studied. For this aim a linear time of time-of-flight mass-spectrometer with variable acceleration potential was used. Nitrogen laser with wavelength 337 nm, pulse width 5 ns and energy up to 100 uJ per pulse was used for ion desorption. Energy spread of desorbed ions was studied both analyzing mass-spectrometric peak shape and using the retarding potential technique. It was shown that the energy spread is nonthermal and can be up to 1.5 eV and is due a number of desorbed ions. It was found that the presence of external extracting electric field has no affect on SALDI process efficiency.
How to cite
Пенто А.В., Никифоров С.М. Влияние внешнего электрического поля на эффективность ионизации и энергетические распределения ионов органических соединений в методе САЛДИ // Электромагнитные волны и электронные системы. 2011. № 2. С. 49–56.
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