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dc.contributor.authorAn, Sejunen_US
dc.contributor.authorKim, Dabinen_US
dc.contributor.authorKim, Sang Kyuen_US
dc.identifier.citationAn, S., Kim, D., & Kim, S. K. (2020). Cryogenic anion photoelectron spectroscopy apparatus with filament ionizer using velocity map imaging. Proc. Of the 7th Asian Spectroscopy Conference (ASC 2020). doi:10.32655/ASC_8-10_Dec2020.54en_US
dc.description.abstractThe new design of the spectroscopy apparatus for cryogenic anion photoelectron spectroscopy consists of velocity map imaging (VMI) and filament ionization source as described in Figure.1. Quadrupole mass filter delivers mass-selected ions into a copper quadrupole ion trap (QIT) that is cryogenically cooled by a closed-cycle cryostat. Especially, copper QIT has a better ability to decrease the temperature of ions trapped compared to normal QIT made from stainless steel.[3] The improved cooling efficiency of copper QIT makes ions not to excite to vibrational state, so it enables us to observe vibration-controlled reaction dynamics. A cryogenically cooled ion packet is extracted from QIT and travels in the Wiley-McLaren time of flight (TOF) region. Both deflectors and einzel lenses fix the turned beam before entering the VMI region. Also, SIMION simulation provides proper electrostatic ion optics and predicts the ion pathway. Based on the simulation, we optimized this described design for increasing the number of focused ions in the interaction region. By using the above system, we obtained a mass spectrum confirming that the TOF system operates well to perform a further experiment.en_US
dc.rights© 2020 Nanyang Technological University.en_US
dc.titleCryogenic anion photoelectron spectroscopy apparatus with filament ionizer using velocity map imagingen_US
dc.typeConference Paperen
dc.contributor.conferenceAsian Spectroscopy Conference 2020en_US
dc.contributor.researchInstitute of Advanced Studiesen_US
dc.description.versionPublished versionen_US
dc.subject.keywordsAnion Photoelectron Spectroscopyen_US
dc.subject.keywordsVelocity Map Imagingen_US
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