USPAS Induction Accelerators

Course instructors:

  • Yu-Jiuan Chen, Lawrence Livermore National Laboratory
  • Josh Coleman, Los Alamos National Laboratory
  • Nathaniel Pogue, Lawrence Livermore National Laboratory
  • Will Waldron, Lawrence Berkeley National Laboratory

The class will meet on M-F at 9:00 - 12:00 and 14:00 - 17:00, except no class on the last Friday afternoon. All morning sessions will be used for lectures. The afternoon sessions will be used for lectures mainly. However, the instructors may also turn parts of afternoon sessions into discussion sessions or office hours.

There will be one problem set per day handed out starting Monday. Problem sets are due at the beginning of class the day after they are handed out. The problem sets will be graded overnight and returned the next day. You are encouraged to work with someone on the problem sets. The final grade will be determined entirely by the problem sets. Therefore each homework set is worth ~11% of the grade.

Course structure

Day 1 - Introduction (Yu-Jiuan Chen),

  • Injectors (Josh Coleman)
    1. Electron Sources & Cathode Physics
      • Thermionic cathode
      • Cold cathodes
      • Photo cathodes
    2. Injector Designs & History
      • LLNL Injectors
      • LANL Injectors
    3. Injector Physics
      • Diode physics overview
      • Diode I-V measurements
      • Diode transport modeling

Day 2 - Pulsed Power - Concepts (Will Waldron)

Day 3a - Pulsed Power - Special Topics (Will Waldron)

Day 3b - Solenoid focusing system, envelope equation, and parametric instability (Nate Pogue)

Day 4 - Spot size scaling law and corkscrew motion (Yu-Jiuan Chen)

Day 5 - Induction cell design (Nate Pogue)

Day 6 - Introduction to instabilities, focus on BBU (Yu-Jiuan Chen)

Day 7 - Introduction to instabilities, focus on Ion Hose (Yu-Jiuan Chen)

Day 8 - Accelerator and Beam diagnostics (Josh Coleman)

    1. Diagnostic Tools & Injector Diagnostics
      • Optical diagnostic tools
      • Diode/Injector Diagnostics
    2. Accelerator & beam diagnostics 1
      • Pulsed power diagnostics, (E-dots, B-dots, dividers, etc)
      • Beam position monitors and beam current diagnostics
      • Emittance and beam profile measurements
      • Invasive beam diagnostics (OTR, ODR, Cherenkov)
    3. Accelerator and beam diagnostics 2
      • Corkscrew and BBU measurements
      • Electron spectrometers
      • Non-invasive diagnostics (ICS, interferometry)
      • New developments, advanced techniques

Day 9 - Target physics and diagnostics (Josh Coleman)

    1. Target Physics
      • e- beam target interaction
      • Target Designs
    2. Target Modeling tools
      • PIC
      • Monte Carlo
      • Hydrodynamic
      • Atomic physics and radiation transport
    3. Target Diagnostics
      • Probing regions & timescales
      • Opacity
      • Optical diagnostics
      • X-ray diagnostics