Design of the EIC hadron storage ring stripline injection kicker with a novel impedance tuning capability

Sangroula, M.  P.; Liaw, C.  J.; Liu, C.; Sandberg, J.; Tsoupas, N.; Xiao, B.; Sun, X.

doi:10.1103/physrevaccelbeams.28.020401

Design of the EIC hadron storage ring stripline injection kicker with a novel impedance tuning capability

Journal Article · Tue Feb 18 00:00:00 EST 2025 · Physical Review Accelerators and Beams

DOI:https://doi.org/10.1103/physrevaccelbeams.28.020401· OSTI ID:2527307

^[1]; Liaw, C. J. ^[1]; Liu, C. ^[1]; Sandberg, J. ^[1]; ^[1]; ^[1]; Sun, X. ^[2]

Brookhaven National Laboratory (BNL), Upton, NY (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)

The Electron-Ion Collider (EIC), to be built at Brookhaven National Laboratory, will be a high luminosity (~10³⁴ cm^–2 s^–1) nuclear science facility. To facilitate EIC experiments, the existing yellow ring of the Relativistic Heavy Ion Collider (RHIC) will be reconfigured to serve as the Hadron Storage Ring (HSR). Designing a stripline injection kicker for the HSR beams, with high magnetic rigidity (~ 82 Tm), poses some technical challenges due to the required large pulsed voltage with long flattop duration, very fast rise time, expected shorter bunch spacing, and potential heating due to higher peak current. In addition, minimizing impedance mismatch in the transition region between the feedthrough and the stripline electrode is challenging. This paper focuses on the mechanical design and optimization of the HSR injection kicker, highlighting a novel impedance tuning capability achieved through an innovative kicker aperture adjustment mechanism. We comprehensively cover the design, including impedance optimization (both beam coupling and characteristic), beam-induced heating, and thermal analysis, and investigation of the maximum electric field due to high voltage signal excitation to ensure safe and reliable operation.

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704

OSTI ID:: 2527307

Report Number(s):: BNL--227638-2025-JAAM

Journal Information:: Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Journal Issue: 2 Vol. 28; ISSN 2469-9888

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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43 PARTICLE ACCELERATORS
beam impedance
beam injection, extraction, and transport
electromagnetic field calculations

Design of the EIC hadron storage ring stripline injection kicker with a novel impedance tuning capability

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