Beam position monitor gate functionality implementation and applications

Journal Article · Thu Jun 14 00:00:00 EDT 2018 · MethodsX

DOI: https://doi.org/10.1016/j.mex.2018.06.006 · OSTI ID:1456893

Cheng, Weixing ^[1]; Ha, Kiman ^[1]; Li, Yongjun ^[1]; Podobedov, Boris ^[1]

---

1. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

We introduce a novel technique to implement gate functionality for the beam position monitors (BPM) at the National Synchrotron Light Source II (NSLS-II). The functionality, now implemented in FPGA, allows us to acquire two separated bunch-trains’ synchronized turn-by-turn (TBT) data simultaneously with the NSLS-II in-house developed BPM system. The gated position resolution is improved about 3 times by narrowing the sampling width. Experimentally we demonstrated that the machine lattice could be transparently characterized with the gated TBT data of a short diagnostic bunch-train Cheng et al., 2017; Li et al., 2017. Other applications, for example, precisely characterizing storage ring impedance/wake-field through recording the beam positions of two separated bunch trains has been experimentally demonstrated.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: SC0012704
• OSTI ID: 1456893
• Report Number(s): BNL--205777-2018-JAAM
• Journal Information: MethodsX, Journal Name: MethodsX Journal Issue: C Vol. 5; ISSN 2215-0161
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English