TY - RPRT TI - Application of Lagrangian techniques for calculating the on-axis rotational transform AU - Guinchard, S. [Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)] (ORCID:0009000466173956) AU - Sengupta, W. [Princeton Univ., NJ (United States)] (ORCID:0000000234152067) AU - Hudson, S. R. [Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)] (ORCID:0000000315302733) PY - 2025 DO - 10.1017/s0022377824001648 UR - https://www.osti.gov/biblio/2536699 ID - 2536699 ER -