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Optimization of the Magnets Arrangement in Insertion Devices and Minimizing the Phase Error Using Genetic Algorithm

Mohammadpour, Karam | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57030 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Vousoghi, Naser; Saeedi, Farhad; Hadad, Mansour
  7. Abstract:
  8. A synchrotron accelerator is a type of charged particle accelerator that uses insertion devices to generate high-intensity X-ray beams. One such insertion device is an undulator, which is made up of an array of magnet blocks. The Halbach method is used to arrange these blocks and create a pure permanent magnet (PPM) undulator. In this study, we used RADIA code to redesign an insertion device named SPEAR. PPMs are unique from one another due to differing remanence levels during construction, impacting their performance and effectiveness in various applications. Therefore, magnet sorting is a method used to reduce the phase error of the synchrotron radiation beam. Decreasing the phase error will reduce the intensity loss of the emitted beam in higher harmonics; therefore, it is essential to reduce the phase error. Due to the large number of magnet block permutations, it is not feasible to evaluate all the possible magnet sorting. We used Genetic algorithm to find the most efficient magnetic sorting. The optimum magnetic sorting obtained by this algorithm reduces phase error by 31.6% compared to a random magnetic block arrangement, with a 190-micrometer deviation of the electron path
  9. Keywords:
  10. Genetic Algorithm ; Phase Errors ; Pure Permanent Magnet ; Insertion Device ; RADIA Code ; Synchrotron ; Phase Oscillator

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