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Final focus system optimization

Final focus system optimization. Rebecca Glaudell CERN REU 2013 be-abp - cC3 with thanks to: rogelio tomas garcia Javier Barranco Garcia. BE – ABP – CC3. Be ams department. C LIC + C TF 3. A ccelerator B eam P hysics. BE – ABP – CC3. Be ams department. C LIC + C TF 3.

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Final focus system optimization

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  1. Final focus system optimization Rebecca Glaudell CERN REU 2013 be-abp-cC3 with thanks to: rogeliotomasgarcia Javier Barranco Garcia

  2. BE – ABP – CC3 Beams department CLIC + CTF3 Accelerator Beam Physics

  3. BE – ABP – CC3 Beams department CLIC + CTF3 Accelerator Beam Physics Rogelio Tomas Javier Barranco

  4. CLIC is a “compact” linear collider.

  5. The Final Focus System is part of the Beam Delivery System. • The Final Focus System (FFS) is focuses the beam near the interaction point (IP). • Within the FFS, there are nine sextupoles that can focus a beam with energy spread.

  6. The sextupoles can have their location and strength adjusted to minimize sigma. • The program MapClass2 simulates the beam and the FFS system. • While higher order calculations of the beam spread are necessary, they are time consuming.

  7. Nelder Mead’s Simplex Method will be used to minimize beam size. • There is no guarantee that the original Nelder Mead’s Simplex Method will look in the right direction, i.e. down the steepest gradient. • Improved Nelder Mead method calculates pseudo-gradients to improve the search direction. • We must adjust the original simplex code and apply it to ALL sextupoles’ positions and strengths.

  8. Anticipated obstacles: • I’m new to Python. • I’ve been calculating σx. I want χ2. • Accuracy increases calculation time. • 10-dimensional simplexes will be difficult to minimize. • Basically, there are many small things to change in the program that optimize the output and it will take a lot of time to find the best parameters.

  9. I want to see mountains again, mountains, Gandalf!

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