Sawtooth Calculation in CEPC-PDR

Two methods for changing the closed orbit due to energy loss in the FLAG system of the new SAD version. Comparison of emit results, beta dispersion, and orbit parameters in RADCOD versus NORADCOD scenarios. Twiss parameters and bunch length comparisons for energy loss in RADCOD. ExternalMap(EMIT) analysis showing delta and dpx relationships and their impact on the system.

• Sawtooth Calculation
• CEPC-PDR
• Energy Loss
• Emit Results
• Twiss Parameters

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Uploaded on Feb 22, 2025 | 0 Views

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1. Sawtooth calculation in CEPC-PDR Jin Wu, Sha Bai

2. Two methods FLAG in new SAD version Change the closed orbit due to energy loss(for each B magnet)

3. FLAG in new SAD version SAD Ver.1.0.10.11k64-pre1 RADCOD/EMIT

4. Emit result comparison RADCOD NORADCOD

5. beta & dispersion & orbit NORADCOD RADCOD

6. Twiss parameters comparison NORADCOD RADCOD x y x* y* x z 0.0800001 0.0809842 0.2200000 0.2189670 0.219915 0.219713 0.001000 0.001081 2.15121nm 5.2697nm 3.38423E-6 m 3.67405E-6 m Bunch length 2.53716622 mm 2.83797076 mm

7. ExternalMap(EMIT) cod+{0,-dpx,0,0,0,-delta} delta = 24.33024*ANGLE^2/L; dpx = delta*ANGLE; ?2 6??0?3?4?2 ?2 6??0?3?4 ?? ?2= ?0= ?

8. Emit result comparison RADCOD Energy loss

9. beta & dispersion & orbit Energy loss RADCOD

10. Twiss parameters comparison Energy loss RADCOD x y x* y* x z 0.0796340 0.0809842 0.2191162 0.2189670 0.219514 0.219713 0.001056 0.001081 4.53568nm 5.2697nm 3.74951E-6 m 3.67405E-6 m Bunch length 2.86413549 mm 2.83797076 mm