LINAC2026 - 33rd Linear Accelerator Conference

Envelope optics for a beam in a traveling-wave linac

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC1.A01: Beam Dynamics, beam simulations, beam transport Poster Session

Speaker

Emma Ghelfi (TRIUMF)

Description

We present a second-order Hamiltonian formulation describing a beam in a traveling-wave rf structure.
With the infinitesimal transfer matrix formalism, the linear optics about the accelerating reference particle are computed. The spatial phase advance is obtained from complex electromagnetic field data by extracting the accumulated phase and differentiating it to determine the local wave number k(s), providing a systematic reduction from full field descriptions to a reduced-order beam dynamics model.
The model is implemented in the first order envelope code TRANSOPTR, with its results benchmarked against a particle tracking code ASTRA. The TRANSOPTR model provides a practical framework for efficient tuning and optimization of systems incorporating traveling-wave linacs.

Funding Agency

We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), grant no. SAPIN-2026-00037