Author: Wan, W.
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Design and Simulation of High Momentum Acceptance Gantries for Ion Beam Therapy  
  • A.M. Huggins
    HHU, Duesseldorf, Germany
  • L.N. Brouwer
    LBNL, Berkeley, USA
  • W. Wan
    ShanghaiTech University, Shanghai, People’s Republic of China
  One challenge of proton beam therapy is the shear size of its equipment. A proton gantry that rotates a beamline about a patient is typically about 10 meters in diameter, heavy and expensive. One approach to reduce size and cost of gantries is their miniaturization by the application of superconducting (SC) magnets in the beamline. SC magnets, however, have difficulties to quickly adapt their field when the beam energy is changed. Achromatic beamline designs with high momentum acceptance based on superconducting magnets can lead to compact gantries that still allow rapid beam application which is an important clinical requirement. In a collaborative effort LBNL, Varian Medical Systems and PSI have developed the Alternating Gradient Canted-Cosine-Theta (AG-CCT), a curved version of the CCT design that includes alternating quadrupole and sextupole components to build an achromat. The AG-CCT reaches a momentum acceptance of approx. 20 % dp/p while preserving beam profiles within clinical specification. Another design, conceived by LBNL and Varian, achieves momentum acceptance over the entire clinical beam energy range (70-225 MeV), called the fixed-field achromat. The beam optics principles of the two achromats and an optimized associated gantry beamline design is the main focus of the presented work, as well as putting these in context of clinical requirements and economic constraints.  
slides icon Slides SUPAF01 [2.886 MB]  
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SHINE: Shanghai High Rep-rate XFEL and Extreme Light Facility  
  • D. Wang
    SINAP, Shanghai, People’s Republic of China
  • W. Wan
    ShanghaiTech University, Shanghai, People’s Republic of China
  SHINE (Shanghai High Rep-rate XFEL and Extreme Light Facility) is a Free Electron Laser facility providing intense x-ray photons at soft and hard X-ray regimes with high repetition rate up to 1 MHz. This new facility is located at Zhangjiang National Comprehensive Science Center, Shanghai, where also hosts other large facilities on photon science including Shanghai Synchrotron Radiation Facility (SSRF) and Soft X-ray Free Electron Laser Facility (SXFEL). With an overall length of about 3.1km the SHINE facility consists a linear accelerator yielding up to 8 GeV electorn beam, 3 long FEL undulator lines producing 0.4-25 keV coherent photons and 10 endstations for user experiments. The ground breaking of project took place in April, 2018. This talk will present the status of SHINE facility with an emphasis on accelerator machine.  
slides icon Slides SUPAG07 [11.228 MB]  
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