In the past two decades, femtosecond enhancement cavities enabling high-order harmonic generation at pulse repetition rates of several tens of MHz have become powerful tools for precision time-domain and frequency-domain spectroscopy in the vacuum- and extreme-ultraviolet spectral regions. In his new book, Ioachim Pupeza reviews the concepts underlying this technology, with a particular emphasis on the development of the MEGAS beamline, currently operated at the Max Planck Institute of Quantum Optics. “MEGAS” stands for Megahertz-repetition-rate pulses for attosecond photoelectron spectroscopy, and the development of this unique beamline has been the subject of the author’s habilitation at the Ludwig-Maximilians-Universität München.

Original Publication:

I. Pupeza, “Passive Optical Resonators for Next-Generation Attosecond Metrology” (Springer, 2022), ISBN 978-3-030-92971-8