A. E. Romero

Email: agustiner at alumni.stanford.edu

ORCID: https://orcid.org/0000-0002-9920-231X

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Ultra-fast transverse beam orbit control in LCLS copper linac. Part I

https://iopscience.iop.org/article/10.1088/1748-0221/17/11/P11031/pdf

Current and future experiments at LCLS require x-ray pulse trains of variable time separation on the nanosecond scale. For instance, the cavity-based XFEL (CBXFEL) will use up to 4 pulses separated by 218.5 ns, the X-ray Laser Oscillator (XLO) will use 15 to 25 ns spaced pulses, and the Matter under Extreme Conditions (MEC) experiments use pulse trains separated by 5 nanoseconds or less. In this paper, we demonstrate an ultra-fast e-beam trajectory control method based on transverse electro-magnetic (TEM) striplines and state-of-the-art power sources, to enhance LCLS operations in these regimes.

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LCLS MULTI-BUNCH IMPROVEMENT PLAN: FIRST RESULTS

https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT037

https://jacow.org/ipac2022/papers/tupopt037.pdf

LCLS copper linac primarily operates in a single bunch mode with a repetition rate of 120 Hz. Presently, several inhouse projects and LCLS user experiments require double- and multi-pulse trains of X-rays, with inter-pulse delay spanning between 0.35 and 220 ns. We discuss beam control improvements to the copper linac using ultra-fast stripline kicker, as well as additional photon diagnostics. We especially focus on a case of double-pulse mode, with 220 ns separation.

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