G. Wei, V.S. Morozov, Fanglei Lin

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Presentation transcript:

Dynamic aperture with tune scan & selection of working point (Ion collider ring) G. Wei, V.S. Morozov, Fanglei Lin Yuri M. Nosochkov, Min-Huey Wang (SLAC) JLEIC Accelerator R&D Meeting, JLab, June 8, 2017 F. Lin

dynamic aperture with tune scan. Current working point (24.22, 23.16) 3 line scan, then make a map for each line Tune scan range (24.0, 23.0)  (24.5, 23.5) (24.03, 23.03)  (24.47, 23.47) Basic DA scan method

dynamic aperture with tune scan. Step: 0.02 Step: 0.01

dynamic aperture with tune scan. 24.22, 23.16 24.1, 23.14

dynamic aperture with tune scan. 24.22, 23.16 24.1, 23.14

dynamic aperture with tune scan. 24.1, 23.14 24.1, 23.14 dp/p ±0.3% ~ 10 

dynamic aperture with tune scan. 24.1, 23.14 24.22, 23.16

dynamic aperture with tune scan. 24.22, 23.16 24.1, 23.14

FMA (Frequency Map Analysis) 24.1, 23.14 24.22, 23.16

dynamic aperture with tune scan. 24.1, 23.14 24.22, 23.16

dynamic aperture with tune scan. 24.22, 23.16 24.1, 23.14

Summary Dynamic aperture with tune scan was done. After surveying in two suitable area, A new working point (24.1, 23.14) was compared with current tune (24.22, 23.16). The new working point (24.1, 23.14) has a bigger DA, but the current working point (24.22, 23.16) has a stable DA for momentum offset.

Dynamic Aperture Map of Tune Scan Problem: Area VS. lines (Xmax, Ymax)

DA with detector solenoid & FFQ multipoles