Code development for Dynamic aperture study. Mau-Sen Chiu Beam Dynamics Group National Synchrotron Radiation Research Center, Taiwan. Outline. Code structure and function description Demonstrate the code Conclusion and further development. Code structure.
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Dynamic aperture study
Beam Dynamics Group
National Synchrotron Radiation Research Center, Taiwan
Code Functions (at present)
1. Linear lattice functions
2. Nonlinear driving terms optimization
3. Tune shift with momentum
4. Tune shift with amplitude
5. Dynamic aperture
6. Phase space tracking
7. Frequency map (not ready)
8. Qx- Qy diagram plus resonance lines (not ready)
9. Momentum acceptance (not ready)
10. Touschek lifetime (not ready)
The treatment of multipole errors, misalignment errors, emittance coupling, and IDs has not been yet included.
Demonstrate the code
Conclusion and future development
1. The code has not been yet finished and still has bug.
a. The corrector, kicker, and ID have not been yet included.
b. The treatment of multipole errors, misalignment errors, and
emittance coupling has not been yet included.
2. Future development:
a. Use TPSA (Truncated power series) (from Yiton) to do particle
tracking and treat the sextupole strengths as variables, so that we
can get the map relation between the dynamic aperture and
sextupole strength or tune variation versus the sextupole strength.
b. Based on a. and use genetic algorithm for dynamic aperture
c. Phase I: Single PC version. Phase II: Parallel version (MPI, …)