Maharjan, C. M.Alnaser, A. S.Tong, X. M.Ulrich, B.Ranitovic, P.Ghimire, S.Chang, Z.Litvinyuk, I. V.Cocke, C. L.2023-12-072023-12-072005-10-12https://hdl.handle.net/2097/43688We have measured with high resolution the full vector momenta of the doubly charged recoil ions produced when Ar and Ne atomic targets are ionized by intense circularly polarized few-cycle (∼8fs) laser pulses in the sequential ionization region. The momentum spectra of the ions were found to exhibit structure which is characteristic of the relative binding energies of the two electrons and the sequential nature of the emission process. We demonstrate that the measured spectra can be used to extract subcycle time information regarding the sequential release of the two electrons.© American Physical Society (APS). This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).Text