NESTI, RenzoRenzoNESTIVILLA, FabrizioFabrizioVILLATERENZI, LUCALUCATERENZI2024-03-072024-03-072014http://hdl.handle.net/20.500.12386/34913This report describes a study of the ALMA band 2+3 (67-116GHz) Fore-Optics (FO) with the aim to investigate the possibility to implement the fore-optics at cold, i.e. inside the cartridge at 15K. We studied the performances of the FO with ALMA antenna and different feed designs. We compare performances with the warm scheme of the FO as implemented in the band 3 cartrdigeELETTRONICOenResearch reportFIS/05 - ASTRONOMIA E ASTROFISICA