title: Two mirror X-ray pulse split and delay instrument for femtosecond time resolved investigations at the LCLS free electron laser facility.
abstract: We built a two-mirror based X-ray split and delay (XRSD) device for soft X-rays at the Linac Coherent Light Source free electron laser facility. The instrument is based on an edge-polished mirror design covering an energy range of 250 eV-1800 eV and producing a delay between the two split pulses variable up to 400 femtoseconds with a sub-100 attosecond resolution. We present experimental and simulation results regarding molecular dissociation dynamics in CH3I and CO probed by the XRSD device. We observed ion kinetic energy and branching ratio dependence on the delay times which were reliably produced by the XRSD instrument.
authors.forename: Nora
authors.initials: N
authors.lastname: Berrah
authors.forename: Li
authors.initials: L
authors.lastname: Fang
authors.forename: Brendan F
authors.initials: BF
authors.lastname: Murphy
authors.forename: Edwin
authors.initials: E
authors.lastname: Kukk
authors.forename: Timur Y
authors.initials: TY
authors.lastname: Osipov
authors.forename: Ryan
authors.initials: R
authors.lastname: Coffee
authors.forename: Ken R
authors.initials: KR
authors.lastname: Ferguson
authors.forename: Hui
authors.initials: H
authors.lastname: Xiong
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Castagna
authors.forename: Vlad S
authors.initials: VS
authors.lastname: Petrovic
authors.forename: Sebastian Carron
authors.initials: SC
authors.lastname: Montero
authors.forename: John D
authors.initials: JD
authors.lastname: Bozek