学术报告：The ESS Accelerator and Cryogenics System
报告题目：The ESS Accelerator and Cryogenics System
报 告 人：John Weisend
John Weisend is currently Deputy Head of Accelerator Projects and Group Leader for Specialized Technical Services at The European Spallation Source in Lund, Sweden. He is also an Adjunct Professor of Engineering at Lund University. He received his Ph.D. in Nuclear Engineering & Engineering Physics from the University of Wisconsin – Madison, where he investigated engineering applications of He II. He has worked at the SSC Laboratory, the Centre D’Etudes Nucleaires Grenoble, the Deutsches Elecktronen-Synchrotron Laboratory (DESY), the Stanford Linear Accelerator Laboratory (SLAC), the National Science Foundation and Michigan State University
Dr. Weisend’s research interests include He II and large scale accelerator cryogenics. He is the Chairman of the Board of Directors of the Cryogenic Society of America (CSA) He has led the CSA Short Course Program since 2001. He is Chief Technical Editor of Advances in Cryogenic Engineering. In addition to co-authoring more than 70 technical papers, Dr. Weisend is the co-author (with N. Filina) of Cryogenic Two-Phase Flow and the editor of the Handbook of Cryogenic Engineering and of Cryostat Design.
The European Spallation Source (ESS) is a state of the art neutron science facility currently under construction in Lund, Sweden. The ESS uses a high power (5 MW) proton beam to create neutrons via spallation in a tungsten target. The resulting neutrons, cooled by a surrounding 20 K hydrogen moderator, then go to a suite of scientific instruments that use the neutrons to conduct research into a variety of materials topics including: condensed matter science, biomaterials and the structure of engineering materials. Once completed, ESS will be the brightest neutron source in the world.
This talk provides an overview of the ESS project and of the proton accelerator including the extensive use of in-kind contributions by partner nations. A key enabling technology of ESS is the cryogenics system that provides cooling to the accelerator, target moderator and instruments. The current status of the cryogenics system will also be presented.