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SLAC Publication: SLAC-PUB-16478
SLAC Release Date: March 6, 2017
Radiation Safety Aspects of the LCLS-II Accelerator at SLAC
Blaha, Jan.
The LCLS-II (Linac Coherent Light Source II) project at SLAC National Accelerator Laboratory will expand further X-ray Free Electron Laser science program in US and worldwide. For that, a new superconducting linac with MW power capability will need to be accommodated in the present accelerator complex. The usage of the existing infrastructure, where some sections are designed only for a low beam power and some have many service penetrations with direct line-of-sight to the beam, etc., make the i... Show Full Abstract
The LCLS-II (Linac Coherent Light Source II) project at SLAC National Accelerator Laboratory will expand further X-ray Free Electron Laser science program in US and worldwide. For that, a new superconducting linac with MW power capability will need to be accommodated in the present accelerator complex. The usage of the existing infrastructure, where some sections are designed only for a low beam power and some have many service penetrations with direct line-of-sight to the beam, etc., make the implementation of the project challenging especially for the radiological impact of the LCLS-II beam operations as well as the choice of the radiation protection measures and controls needed to mitigate them. The paper introduces radiation safety systems and strategies employed at SLAC and describes in more detail different radiation shielding solutions to protect personnel and environment against prompt as well as residual radiation within LCLS-II project. For instance, shielding for locations with expected high beam losses, such as dumps and collimators, and shielding for various types of penetrations connecting accelerator enclosure with occupied areas. Moreover, the evaluation of radiation due to field emission from the accelerator cavities for radiological and machine protection purposes is also given. Finally, description of the Radiation Safety Systems at SLAC including the Beam Containment System and Access Control System and other systems required to protect personnel, public and the environment, is described as well. Show Partial Abstract
  • Interest Categories: Accelerator Physics, Accelerator (control systems), Safety, X-Ray Free Electron Laser, Other