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Chaotic behavior of channeling particles.
Ling Chen1, Alain E. Kaloyeros, Guang-Hou Wang
1Department of Physics, The University at Albany-SUNY, Albany, New York 12222Department of Physics, Nanjing University, Nanjing 210008, People's Republic of China.
Chaos (Woodbury, N.Y.)
|March 1, 1994
Summary
Energetic charged particles exhibit channeling within crystal lattices. This study demonstrates how particle energy and incident angle control the transition from regular to chaotic motion in tungsten, explaining experimental observations.
Area of Science:
- Condensed matter physics
- Crystallography
- Particle physics
Background:
- Channeling involves the guided motion of energetic charged particles along crystal lattice structures.
- Particle trajectories can transition from predictable periodic motion to complex chaotic behavior within crystal channels.
Purpose of the Study:
- To simulate and analyze the transition from regular to chaotic motion in charged particle channeling.
- To investigate the influence of projectile energy and incident angle on channeling dynamics.
- To explain experimental fine structures in angular scans using chaotic motion.
Main Methods:
- Utilized the Moliere potential for approximating particle-atom interactions.
- Simulated channeling of positively charged particles in a tungsten (100) crystal plane.
- Varied channeling parameters, including projectile energy and incident angle.
Main Results:
- Demonstrated the transition from regular to chaotic motion by adjusting channeling parameters.
- The Moliere potential effectively models particle-lattice interactions.
- Simulated results correlate with observed phenomena in channeling experiments.
Conclusions:
- Chaotic motion is a significant factor in charged particle channeling dynamics.
- The transition to chaos is controllable via particle energy and incident angle.
- This work provides a theoretical basis for interpreting fine structures in channeling experiments.