Damien Charles Weber has been Head and Chairman of the Center for Proton Therapy at the Paul Scherrer Institute since 2013. He has currently a faculty position both at the University of Zürich and Bern. He trained as a radiation oncologist at the University Hospital of Geneva and was a clinical and research fellow at the General Massachusetts Hospital/Harvard Medical School, after which he worked at PSI when coming back to Switzerland. His domain of expertise is Neuro-Oncology and has been past Chair both for the Radiation Oncology Group of the European Organization for the Research and Treatment of Cancer and for the Swiss Association for the Research in Radiation Oncology. He is currently the Co-Chairman of the European Particle Therapy Network (European Society of RadioTherapy and Oncology; ESTRO) and of the Publication Committee, Particle Therapy Oncology Group, as well as member of ESTRO's Scientific Council.

Uli Weber got his Ph.D. (Dr. rer. nat) in physics at the University of Kassel (Germany) in 1996. This research project was hosted by the GSI Biophysics department. During his PhD work and the following post-doctoral period (until 2000) he was working for the ion-beam therapy project at GSI, where more than 400 patients were treated. A main focus of his work was the development of precise and filigree beam modulators that enable a faster a precise treatment in combination with the raster scanning technique. In 2001, he switched to a large German hospital company (Rhön Klinikum AG) in order to work as the technical project manager for the construction of the Heidelberg and Marburg ion-beam therapy facilities. In 2015, after the completion of the construction Uli Weber returned to the GSI Biophysics department as head of the research group Space Radiation Physics. The main focus of research in this group lies on shielding and cross section measurements for space radiation, but also on ion-beam therapy relevant topics such as developments of 3D-printed beam modulators for fast treatment of patients.

Working on novel technology for bringing microbeam radiotherapy and FLASH radiotherapy closer to clinical application, I am a researcher in Medical Physics at the Technical University of Munich and the Helmholtz Center Munich. I studied Physics with a focus on Medical Physics and Biophysics at the University of Heidelberg, the German Cancer Research Center, and the University of Umeå in Sweden.

Dr. Wong is Professor Emeritus in the Department of Radiation Oncology and Molecular Radiation Sciences at Johns Hopkins University School of Medicine. Dr. Wong joined Hopkins in 2004 as the previous Director of Division of Medical Physics and oversaw the physics and dosimetry services of the department. Dr. Wong is the primary or contributing author of over 180 peer-reviewed scientific publications and 20 book chapters. He has been a principal investigator or co-investigator on 20 research initiatives funded by public agencies and industries. He is a co-inventor of the Active Breathing Coordinator, flat panel Cone-Beam CT, the Small Animal Radiation Research Platform (SARRP) and the new FLASH-SARRP that have been commercialized as radiation therapy products for the clinical and research community. Dr. Wong is a Fellow of the American Association of Medical Physicists and the awardee of the 2017 Edith Quimby Lifetime Achievement Award of the AAPM. He remains active in advancing cancer treatment through education, research and collaboration. His current research focus is on the translation potentials of spatial and temporal modulation in radiation treatment and molecular dosimetry to resolve biological responses to various radiation modalities.

Walter Wuensch is a principle applied physicist in the Radio-Frequency group at CERN currently leading the development of high-performance linac technology for multiple applications including CLIC and a broad range of next-generation compact accelerators including XFELs, Inverse Compton Sources and medical linacs. The accelerator technology development is complemented by both theoretical and experimental investigations of the fundamental processes which occur at high-gradients including field emission and breakdown. The investigations are illuminating long-standing mysteries and the newly gained understanding are being applied to a range of applications the electron linacs, RFQs and high-voltage systems.

Professor Cheng-Shie Wuu is currently the Director of Medical Physics at Department of Radiation Oncology, Columbia University Irving Medical Center. He is also the Clinical Director of Medical Physics Graduate Program at Department of Applied Physics and Applied Math, Columbia University. His research interests focus on 3D dosimetry using radiochromic plastic dosimeters with optical CT scanning, EPID transit dosimetry, and Cerenkov radiation. He is a Fellow of ACR as well as a Fellow of AAPM.