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We present the development of a time- and angle-resolved photoemissionspectroscopy based on a Yb-based femtosecond laser and a hemispherical electronanalyzer. The energy of the pump photon is tunable between 1.4 and 1.9 eV, andthe pulse duration is around 30 fs. We use a KBe$_2$BO$_3$F$_2$ non-linearoptical crystal to generate probe pulses, of which the photon energy is up to6.7 eV, and obtain an overall time resolution of 1 ps and energy resolution of18 meV. In addition, $\beta$-BaB$_2$O$_4$ crystals are used to generatealternative probe pulses at 6.05 eV, giving an overall time resolution of 130fs and energy resolution of 19 meV. We illustrate the performance of the systemwith representative data on several samples (Bi$_2$Se$_3$, YbCd$_2$Sb$_2$,FeSe).

A time- and angle-resolved photoemission spectroscopy with probe photon energy up to 6.7 eV