An experimental setup to study delayed electron emission upon photoexcitation of trapped polyatomic anions

Saha, K and Prabhakaran, A and Chandrasekaran, V and Rappaport, ML and Heber, O and Zajfman, D (2017) An experimental setup to study delayed electron emission upon photoexcitation of trapped polyatomic anions. In: Review of Scientific Instruments, 88 (5). 053101. ISSN 0034-6748

PDF rev_sci_ins_88-5_2017 .pdf - Published Version Restricted to Registered users only Download (7MB) | Request a copy

Abstract

A Velocity Map Imaging (VMI) spectrometer has been designed and integrated with an electrostatic ion beam trap to study delayed electron emission from trapped polyatomic anions upon photodetachment. The VMI spectrometer is small in size and can record a wide range of photoelectron energies, with variable magnification. Delayed electron emission can be recorded in our experimental setup for any time duration after the photoexcitation of the polyatomic anions. Experiments were carried out with trapped O− and C5− ions to demonstrate the capability of the spectrometer. Delayed electron emissions from C5− as well as prompt photoelectrons from O− were detected by the VMI spectrometer upon photoexcitation. The design and performance of the spectrometer are presented in detail.

Item Type:	Journal Article
Publication:	Review of Scientific Instruments
Publisher:	American Institute of Physics Inc.
Additional Information:	The copyright for this article belongs to the American Institute of Physics Inc.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	02 Jun 2022 05:03
Last Modified:	02 Jun 2022 05:03
URI:	https://eprints.iisc.ac.in/id/eprint/73013

Actions (login required)

View Item