TY - RPRT TI - A flexible and differentiable coil proxy for stellarator equilibrium optimization AU - Fu, Lanke [Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States); New York Univ. (NYU), NY (United States)] (ORCID:000000026845387X) AU - Panici, Dario [Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)] (ORCID:0000000307364360) AU - Paul, Elizabeth J. [Columbia Univ., New York, NY (United States)] (ORCID:0000000293555595) AU - Kaptanoglu, Alan A. [New York Univ. (NYU), NY (United States)] (ORCID:0000000263372907) AU - Bhattacharjee, Amitava [Princeton Univ., NJ (United States)] (ORCID:0000000164110178) PY - 2026 DO - 10.1063/5.0307710 UR - https://www.osti.gov/biblio/3375921 ID - 3375921 ER -