Speaker
Description
High Intensity Heavy-ion Accelerator Facility (HIAF) is a giant accelerator facility aiming at high intensity primary and secondary beam preparation which is under construction in China. To achieve the challenging intensity goal, high intensity beam preparation remains a top priority of dynamics research. The first issue is how to accumulate in BRing with High injection gain(>56) and low beam loss(<5%). A dual-plane painting injection scheme is proposed, which performs horizontal and vertical painting simultaneously using a tilted electrostatic septum. The second issue is serious beam loss in early acceleration. The beam loss can induce dynamic vacuum effect, which is a more tougher intensity restriction issue than space charge effect. Mitigating the dynamic vacuum effect in the early stage is a critical approach to achieve a higher beam intensity. Therefore, a novel ES collimator is proposed. Dynamic simulation of the dual-plane painting injection of BRing reveals that the excellent performance of this scheme by a tenfold reduction in beam loss. The features associated with collimation efficiency and structure optimization are analyzed in detail.
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