Principles and operation of a new type of electron spectrometer – ArTOF

Highlights: •We describe new angle and time resolving electron analyzer with outstanding performance. •The transmission is more than 250 times higher compare to conventional hemispherical analyzer, no loss of energy resolution, time resolved studies are possible. •Details of operation modes and handling are discussed. •Review of studies performed is given as also an outlook of future possibilities. •Examples of new applications are discussed. -- Abstract: A new energy and angular electron analyzer ArTOF (Angular Resolved Time of Flight) is described. The analyzer is based on simultaneous measurement of flight times and angles in an advanced electron lens system. In angular modes the new analyzer combines an increase in transmission by almost three orders of magnitude with improved resolution, in comparison to standard state-of-the-art electron spectrometers. In this report we describe some design principles and we give a review of calibration and alignment procedures necessary for the use of the ArTOF on a synchrotron radiation facility. Our program scripts to handle the large datasets are also discussed. Furthermore we give a broad description of the new research fields that benefit from the use of the ArTOF and give a short summary of the first results of angle resolved photoemission measurement with ArTOF using the single-bunch X-ray pulses from the BESSY II storage ring facility