Injector Status Jan. 26, 2016 Time Meeting Haixin Huang.

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Injector Status Jan. 26, 2016 Time Meeting Haixin Huang

2 Injector Status l We worked on several bunch merge schemes now. l 8->4->2 merge: Bunch intensity is about E9/bunch. The highest from last year was 2.1E9/bunch with slightly higher EBIS input. Longitudinal emittance is about 0.7eVs. Currently, this setup is used for RHIC injection. l 6->3->1 merge: Booster merge is improved. RF radial loop is used to make the merge more stable so that baby bunch percentage is reduced to 12% (last year was >20%). The bunch intensity is 2.5E9 now (2.3E9 last year). Longitudinal emittance is larger, about 0.8eVs. l 12->6->2 merge: l with higher total intensity, the plunge foil provides additional protection for beam pipes. The plunge foil has been set up properly and ready for use. l The 13 Booster cycles have been tested for 7sec super cycle for 15 minutes and it is confirmed that 13 Booster cycles does not violate the PPMR requirement. l The Booster cycle has to be modified to meet the PPMR requirement. For this to happen, the merge has to move to higher energy. This remains to be done. l G10 kicker timing alignment issue is worked on.

Haixin Huang 3 AGS Bunch Merge Comparison 6->3->1 Merge 8->4->2 Merge