Speaker
Description
Precise reconstruction of the beam sigma matrix is critical for transport-line modeling and injection optimization. Our earlier work demonstrated that the differentiable simulation framework Cheetah enables gradient-based recovery of the 5×5 transverse sigma matrix at the APS-U BTS transport line using quadrupole scans. In this paper, we extend the method to improve efficiency and robustness. We introduce a generalized formulation that incorporates multi-screen measurements, providing increased stability in realistic lattice configurations. The differentiable-tracking approach yields physically consistent reconstructions while remaining computationally scalable. These developments form a practical framework for sigma-matrix determination in complex transport lines and support future real-time model calibration and tuning at the APS-U and similar facilities.
Funding Agency
The work is supported by the U.S. DOE Office of Science-Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
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