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Published on: August 1, 2017
Particle simulation for direct plasma injection in a radio frequency quadrupole matching section
J Tamura1, T Hattori, N Hayashizaki
1Department of Energy Sciences, Tokyo Institute of Technology, Yokohama 226-8502, Japan. jtamura@riken.jp
The Review of Scientific Instruments
|March 3, 2010
Summary
Direct plasma injection into radio frequency quadrupole linacs requires an initially convergent beam to overcome electrostatic forces. Optimizing plasma density is crucial for efficient heavy-ion acceleration.
Area of Science:
- Physics
- Particle Accelerators
- Plasma Physics
Background:
- The direct plasma injection scheme (DPIS) is being investigated for high-intensity heavy-ion beam acceleration.
- This method involves injecting laser-produced plasma directly into a radio frequency quadrupole (RFQ) linac.
Purpose of the Study:
- To analyze the beam dynamics during ion injection in the DPIS.
- To identify factors affecting transmission efficiency within the RFQ matching section.
Main Methods:
- Three-dimensional particle-in-cell (PIC) simulations were employed to track particle motions.
- The simulations focused on the RFQ matching section to evaluate beam dynamics.
Main Results:
- The electrostatic field from the extraction electrode was found to decrease transmission efficiency.
- A radially defocusing force necessitates an initially convergent input beam for the RFQ.
Conclusions:
- The DPIS requires careful beam manipulation, specifically an initially convergent beam, to mitigate electrostatic effects.
- Further optimization of plasma density is essential for achieving optimal matching and improved performance in DPIS for heavy-ion acceleration.
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