Nicolas FagnoniEloy de Lera AcedoDavid R. DeBoerZara AbdurashidovaJames E. AguirrePaul AlexanderZaki S. AliYanga BalfourAdam P. BeardsleyBERNARDI, GIANNIGIANNIBERNARDITashalee S. BillingsJudd D. BowmanRichard F. BradleyPhil BullJacob BurbaChris L. CarilliCarina ChengMatt DexterJoshua S. DillonAaron Ewall-WiceRandall FritzSteve R. FurlanettoKingsley Gale-SidesBrian GlendenningDeepthi GorthiBradley GreigJasper GrobbelaarZiyaad HaldayBryna J. HazeltonJacqueline N. HewittJack HickishDaniel C. JacobsAlec JosaitisAustin JuliusNicholas S. KernJoshua KerriganHonggeun KimPiyanat KittiwisitSaul A. KohnMatthew KolopanisAdam LanmanPaul La PlanteTelalo LekalakeAdrian LiuDavid MacMahonLourence MalanCresshim MalgasMatthys MareeZachary E. MartinotEunice MatsetelaJuan Mena ParraAndrei MesingerMathakane MolewaMiguel F. MoralesTshegofalang MosianeAbraham R. NebenBojan NikolicAaron R. ParsonsNipanjana PatraSamantha PieterseJonathan C. PoberNima Razavi-GhodsJames RobnettKathryn RosiePeter SimsCraig SmithAngelo SyceNithyanandan ThyagarajanPeter K. G. WilliamsHaoxuan Zheng2022-03-222022-03-2220210035-8711http://hdl.handle.net/20.500.12386/31767The detection of the Epoch of Reionization (EoR) delay power spectrum using a "foreground avoidance method" highly depends on the instrument chromaticity. The systematic effects induced by the radio-telescope spread the foreground signal in the delay domain, which contaminates the EoR window theoretically observable. Applied to the Hydrogen Epoch of Reionization Array (HERA), this paper combines detailed electromagnetic and electrical simulations in order to model the chromatic effects of the instrument, and quantify its frequency and time responses. In particular, the effects of the analogue receiver, transmission cables, and mutual coupling are included. These simulations are able to accurately predict the intensity of the reflections occurring in the 150-m cable which links the antenna to the back-end. They also show that electromagnetic waves can propagate from one dish to another one through large sections of the array due to mutual coupling. The simulated system time response is attenuated by a factor $10^{4}$ after a characteristic delay which depends on the size of the array and on the antenna position. Ultimately, the system response is attenuated by a factor $10^{5}$ after 1400 ns because of the reflections in the cable, which corresponds to characterizable ${k_\parallel}$-modes above 0.7 $h\;\rm{Mpc}^{-1}$ at 150 MHz. Thus, this new study shows that the detection of the EoR signal with HERA Phase I will be more challenging than expected. On the other hand, it improves our understanding of the telescope, which is essential to mitigate the instrument chromaticity.STAMPAenArticle10.1093/mnras/staa32682-s2.0-85099720674https://academic.oup.com/mnras/article/500/1/1232/5935258?login=truehttp://arxiv.org/abs/1908.02383v2FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation