Synopsis The new designed Time-resolved Atomic, Molecular and Optical Science end station, will be conﬁgured to take full advantage of both the high per pulse energy from the copper accelerator (120 Hz) as well as high average intensity and high repetition rate (1 MHz) from the superconducting accelerator. TMO will support many experimental techniques not currently available at LCLS and will have two X-ray beam focus spots. Thereby, TMO will support AMO science, strong-ﬁeld and nonlinear science and a new dynamic reaction microscope.
The unique capabilities of LCLS, the world’s ﬁrst hard X-ray FEL, have had signiﬁcant impact on advancing our understanding across a broad range of scientiﬁc ﬁelds, from fundamental atomic and molecular physics, to condensed matter, to catalysis and structural biology. A major upgrade of the LCLS facility, the LCLSII project, is now underway. LCLS-II is being developed as a high-repetition rate X-ray laser with two simultaneously operating, independently tunable FELs. It features a 4 GeV continuous wave superconducting linac that is capable of producing uniformly spaced (or programmable) ultrafast X-ray laser pulses at a repetition rate up to 1 MHz spanning the energy range from 0.25 to 5 keV. Furthermore, the XLEAP sub-femtosecond soft X-ray pulse generation program is scalable to LCLS-II repetition rate.
The Time-resolved atomic, Molecular and Optical Science (TMO) instrument, one of the three new LCLS-II instruments with a energy range from 0.25 to 2 keV, will support AMO science, strong-ﬁeld and nonlinear science, and a new dynamic reaction microscope. TMO will support many experimental techniques not currently available at LCLS and will have two X-ray focus spots. At the ﬁrst focus spot of the TMO instrument we will oﬀer the possibility to install standardized modular stations (roll in and out) which can be set up, aligned and commissioned out
side the hutch and then get installed for operations. These highly standardized stations will be optimized for performing high energy, high resolution, time- but also angular-resolved photoelectron spectroscopic measurements by using high resolution iTOF and eTOF, double-sidedVMI  or coaxial-VMI , and the future MRCOFFEE endstation. At the second focus spot a new reaction microscope endstation will house a COLTRIMS type spectrometer to accommodate extreme vacuum, sub-micron focus spot size, and target purity requirements as dictated by coincidence experiments. The accumulation of data will be performed on an event-by-event basis using the 1 MHz full repetition rate of LCLS-II. We would like to present some of the important science opportunities, new capabilities and instrumentation being planned for NEH 1.1 (TMO) at LCSL-II.
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