2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219140The physics programme of the ILC requires polarimetry with yet unprecedented precision. This note focusses on aspects of the upstream polarimeter as described in the ILC Reference Design Report which are not compatible with the extraordinary precision goals. In conclusion, recommendations for improving the design are given.to appear in the proceedings of LCWS 2008Instrumentation and DetectorsHigh Energy Physics - Experimenttext