TU2A —  Invited Oral Presentations   (11-Sep-12   10:50—12:20)
Chair: Y.H. Chin, KEK, Ibaraki, Japan
Paper Title Page
Review of FEL Projects  
  • J.N. Corlett
    LBNL, Berkeley, California, USA
  This talk will review the status of FELs in operation and proposals for major FEL facilities in the world.  
slides icon Slides TU2A01 [18.141 MB]  
TU2A02 Overview of SACLA Machine Status 427
  • Y. Otake
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  SACLA of an X-ray free-electron laser has been constructed and was successfully lased at 0.06 nm in 2011. SACLA mainly comprises a low-emittance thermionic electron gun, an 8-GeV linear accelerator using C-band (5712 MHz) cavities and 18 in-vacuum undulators. The concept to develop this machine is compactness compared with the other machine, such as LCLS with the length of more than 1 km. Stable X-ray lasing up to 0.06 nm as also the concept demands extreme stable accelerator components, such as 50 fs temporal stability at a cavity in an injector. We now realized a 700 m compact machine by a low-emittance at the electron gun, an accelerating gradient of more than 35 MV/m with the C-band accelerator, and the short-period undulators. The continuous lasing for more than several days is strongly supported by these stable components and small operator‘s trimming, and also established by reduction of perturbation sources to laser instability. SACLA is regularly operated for user experiments, such as the imaging with extreme amount of data. This presentation introduces the machine performance, the reduction of the perturbation sources and the operation of SACLA.  
slides icon Slides TU2A02 [28.971 MB]  
TU2A03 LCLS Operation Experience and LCLS-II Design 432
  • T.O. Raubenheimer
    SLAC, Menlo Park, California, USA
  This talk will report the operations experience at LCLS and will describe the LCLS-II, a new X-ray FEL facility that uses the middle 1/3 of the SLAC linac as compared to the LCLS which uses the last 1/3 of the SLAC linac.  
slides icon Slides TU2A03 [4.761 MB]  
TU2A04 High Current ERL at BNL 437
  • I. Ben-Zvi
    BNL, Upton, Long Island, New York, USA
  The electron hadron collider eRHIC will collide polarized and unpolarized electrons with a current of 50 mA and energy in the range of 5 GeV to 30 GeV with hadron beams, including heavy ions or polarized light ions of the RHIC storage ring. The electron beam will be generated in an energy recovery linac contained inside the RHIC tunnel, comprising six passes through two linac section of about 2.5 GeV each. The electron ERL poses many challenges in term of a high-current high-polarization electron gun, HOM damping in the linac, crab cavities, harmonic cavities and beam stability.  
slides icon Slides TU2A04 [2.227 MB]