Author: Donadio, M.P.
Paper Title Page
WEPHA044 Upgrade of the Bunch Length and Bunch Charge Control Systems for the New SLAC Free Electron Laser 1185
  • M.P. Donadio, A.S. Fisher, L. Sapozhnikov
    SLAC, Menlo Park, California, USA
  In 2019 SLAC is building a new linear accelerator based on superconducting niobium cavities. The first one, now called the copper linac, could generate 120 electron bunches per second. The new one, called superconducting linac, will generate 1 million per second, bringing some challenges to many devices along with the accelerator. Most of them receive sensors and actuators in a VME-based Platform with its control running in software, with RTEMS as OS. This is feasible for 120 Hz, but not for 1 MHz. The new control hardware is ATCA-based Platform, that has carrier boards with FPGA connected to servers running Embedded real-time Linux OS, forming the High-Performance System (HPS). Instead of having all the new architecture installed at the accelerator and tested on the go, SLAC used the strategy of testing the systems in the copper linac, to have them ready to use in the superconducting linac in what was called the Mission Readiness Program. The Bunch Length System and the Bunch Charge System are examples of devices of this program. Both systems were tested in the copper linac at 120 Hz, with excellent results. The next step is to test them at the superconducting linac, at 1 MHz.  
poster icon Poster WEPHA044 [1.308 MB]  
DOI • reference for this paper ※  
About • paper received ※ 28 September 2019       paper accepted ※ 09 October 2019       issue date ※ 30 August 2020  
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