08 Applications of Accelerators, Technology Transfer and Industrial Relations
T27 Neutron Sources
Paper Title Page
THPS060 RAM Methodology and Activities for IFMIF Engineering Design 3565
 
  • J.M. Arroyo, A. Ibarra, J. Molla
    CIEMAT, Madrid, Spain
  • J. Abal, E. Bargalló, J. Dies, C. Tapia
    UPC, Barcelona, Spain
 
  IFMIF will be an accelerator-based neutron source to test fusion candidate materials. The Engineering Validation and Engineering Design Activities of IFMIF are aimed to deliver the complete engineering design file of this major facility. Achieving a high level of availability and reliability is a key point for IFMIF mission. A goal of 70% of operational availability has been established. In order to fulfill the availability requirements, RAM has to be considered during the engineering design phase. This paper summarizes the methodology developed and the proposed process aimed at including RAM in the design of IFMIF, as well as the activities performed in this framework. Overall RAM specifications have been defined for IFMIF project. RAM methodology dealing with RAM design guidelines, reliability database and RAM modelization has been developed. As a first step for the iterative process of RAM analysis of IFMIF design, a fault tree model based on a new reliability database has been performed with Risk Spectrum®. The result is a first assessment of the availability and first allocation of RAM requirements.  
 
THPS062 Cavity-recirculated Laser Charge Stripping of Hydrogen Ions 3568
 
  • I. Jovanovic
    Penn State University, University Park, Pennsylvania, USA
  • R. Tikhoplav
    RadiaBeam, Santa Monica, USA
 
  Funding: This work is supported by the U.S. Department of Energy.
High-intensity proton accelerators such as those at the Oak Ridge National Laboratory’s Spallation Neutron Source require an intense, robust, reliable, and low-cost source of hydrogen ions. Laser-based charge stripping is a promising, high-efficiency method that could meet the requirements of present and future facilities. We are seeking to improve the efficiency of hydrogen ion stripping by an order of magnitude using laser recirculation. In our approach we recirculate a high-power laser using the technique termed recirculation injection by nonlinear gating, with a frequency-doubling nonlinear crystal as an efficient switch that allow pulse injection into the cavity. We present our progress on cavity development and the preliminary experimental assessment of cavity performance in high-radiation environment. Our experimental studies were conducted by irradiating the nonlinear crystal used in the laser cavity by fast neutrons in a research nuclear reactor and measuring its change in transmissivity.