TY - RPRT TI - Towards advanced polarized electron sources AU - Litvinenko, Vladimir N. [Stony Brook Univ., NY (United States)] (ORCID:0000000224186060) AU - Bachhawat, Nikhil [Stony Brook Univ., NY (United States)] (ORCID:0000000191020127) AU - Brutus, Jean Clifford [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0009000005333574) AU - Cultrera, Luca [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Decker, Kenneth [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Gaowei, Mengjia [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Inacker, Patrick [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Jing, Yichao [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Ma, Jun [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Mondal, Kali Prasanna [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000162509126) AU - Narayan, Geetha [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Pinayev, Igor [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:000000023718876X) AU - Severino, Freddy [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Shih, Kai [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000156454245) AU - Skaritka, John [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Smart, Loralie [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Than, Yatming [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000180716292) AU - Walsh, John [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Wang, Erdong [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000199093099) AU - Wang, Gang [Brookhaven National Laboratory (BNL), Upton, NY (United States)] AU - Weiss, Dan [Brookhaven National Laboratory (BNL), Upton, NY (United States)] PY - 2026 DO - 10.1038/s41567-025-03138-7 UR - https://www.osti.gov/biblio/3018633 ID - 3018633 ER -