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We describe a setup of time-, spin-, and angle-resolved photoemissionspectroscopy (tr-SARPES) employing a 10.7-eV ($\lambda$=115.6 nm) pulse laserat 1-MHz repetition rate as a probe photon source. This equipment effectivelycombines technologies of a high-power Yb:fiber laser, ultraviolet-drivenharmonic generation in Xe gas, and a SARPES apparatus equipped withvery-low-energy-electron-diffraction (VLEED) spin detectors. A high repetitionrate (1 MHz) of the probe laser allows experiments with the photoemissionspace-charge effects significantly reduced, despite a high flux of 10$^{13}$photons/s on the sample. The relatively high photon energy (10.7 eV) alsobrings the capability of observing a wide momentum range that covers the entireBrillouin zone of many materials while ensuring high momentum resolution. Theexperimental setup overcomes a low efficiency of spin-resolved measurements,which gets even more severe for the pump-probed unoccupied states, and affordsfor investigating ultrafast electron and spin dynamics of modern quantummaterials with energy and time resolutions of 25 meV and 360 fs, respectively.

Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser