SPARC PhD Award 2021 for Robert Klas Robert Klas Friedrich-Schiller University Jena and Helmholtz Institute Jena, Germany The SPARC collaboration sincerely congratulates Robert Klas (HI-Jena) on receiving [...] receiving the SPARC PhD award 2021. This prestigious award was conferred to Robert Klas for his outstanding PhD work on Efficiency Scaling of High Harmonic Generation using Ultrashort Fiber Lasers . Robert’s [...] been proposed, granted beam time, and conducted by the SPARC collaboration at CRYRING in 2019 and 2021 (E129). The successful implementation, however, posed a number of challenges. During the course of