Berkhout, Lindsay M.Lindsay M.BerkhoutJacobs, Daniel C.Daniel C.JacobsAbdurashidova, ZuhraZuhraAbdurashidovaAdams, TyroneTyroneAdamsAguirre, James E.James E.AguirreAlexander, PaulPaulAlexanderAli, Zaki S.Zaki S.AliBaartman, RushelleRushelleBaartmanBalfour, YangaYangaBalfourBeardsley, Adam P.Adam P.BeardsleyBERNARDI, GianniGianniBERNARDIBillings, Tashalee S.Tashalee S.BillingsBowman, Judd D.Judd D.BowmanBradley, Richard F.Richard F.BradleyBULL, PHILIPPHILIPBULLBurba, JacobJacobBurbaByrne, RubyRubyByrneCarey, StevenStevenCareyCarilli, Chris L.Chris L.CarilliChen, Kai FengKai FengChenCheng, CarinaCarinaChengChoudhuri, SamirSamirChoudhuriDeBoer, David R.David R.DeBoerde Lera Acedo, EloyEloyde Lera AcedoDexter, MattMattDexterDillon, Joshua S.Joshua S.DillonDynes, ScottScottDynesEksteen, NicoNicoEksteenEly, JohnJohnElyEwall-Wice, AaronAaronEwall-WiceFagnoni, NicolasNicolasFagnoniFritz, RandallRandallFritzFurlanetto, Steven R.Steven R.FurlanettoGale-Sides, KingsleyKingsleyGale-SidesGarsden, HughHughGarsdenGehlot, Bharat KumarBharat KumarGehlotGhosh, AbhikAbhikGhoshGlendenning, BrianBrianGlendenningGorce, AdelieAdelieGorceGorthi, DeepthiDeepthiGorthiGreig, BradleyBradleyGreigGrobbelaar, JasperJasperGrobbelaarHalday, ZiyaadZiyaadHaldayHazelton, Bryna J.Bryna J.HazeltonHewitt, Jacqueline N.Jacqueline N.HewittHickish, JackJackHickishHuang, TianTianHuangJosaitis, AlecAlecJosaitisJulius, AustinAustinJuliusKariseb, MacCalvinMacCalvinKarisebKern, Nicholas S.Nicholas S.KernKerrigan, JoshuaJoshuaKerriganKim, HonggeunHonggeunKimKittiwisit, PiyanatPiyanatKittiwisitKohn, Saul A.Saul A.KohnKolopanis, MatthewMatthewKolopanisLanman, AdamAdamLanmanLa Plante, PaulPaulLa PlanteLiu, AdrianAdrianLiuLoots, AnitaAnitaLootsMa, Yin ZheYin ZheMaEdward MacMahon, David HaroldDavid HaroldEdward MacMahonMalan, LourenceLourenceMalanMalgas, CresshimCresshimMalgasMalgas, KeithKeithMalgasMarero, BradleyBradleyMareroMartinot, Zachary E.Zachary E.MartinotMesinger, AndreiAndreiMesingerMolewa, MathakaneMathakaneMolewaMorales, Miguel F.Miguel F.MoralesMosiane, TshegofalangTshegofalangMosianeMurray, Steven G.Steven G.MurrayNeben, Abraham R.Abraham R.NebenNikolic, BojanBojanNikolicNunhokee, Chuneeta DeviChuneeta DeviNunhokeeNuwegeld, HansHansNuwegeldParsons, Aaron R.Aaron R.ParsonsPascua, RobertRobertPascuaPatra, NipanjanaNipanjanaPatraPieterse, SamanthaSamanthaPieterseQin, YuxiangYuxiangQinRath, EleanorEleanorRathRazavi-Ghods, NimaNimaRazavi-GhodsRiley, DanielDanielRileyRobnett, JamesJamesRobnettRosie, KathrynKathrynRosieSantos, Mario G.Mario G.SantosSims, PeterPeterSimsSingh, SaurabhSaurabhSinghStorer, DaraDaraStorerSwarts, HiltonHiltonSwartsTan, JianrongJianrongTanThyagarajan, NithyanandanNithyanandanThyagarajanvan Wyngaarden, PieterPietervan WyngaardenWilliams, Peter K.G.Peter K.G.WilliamsZheng, HaoxuanHaoxuanZhengXu, ZhileiZhileiXu2024-05-292024-05-2920240004-6280http://hdl.handle.net/20.500.12386/35147This paper presents the design and deployment of the Hydrogen Epoch of Reionization Array (HERA) phase II system. HERA is designed as a staged experiment targeting 21 cm emission measurements of the Epoch of Reionization. First results from the phase I array are published as of early 2022, and deployment of the phase II system is nearing completion. We describe the design of the phase II system and discuss progress on commissioning and future upgrades. As HERA is a designated Square Kilometre Array pathfinder instrument, we also show a number of “case studies” that investigate systematics seen while commissioning the phase II system, which may be of use in the design and operation of future arrays. Common pathologies are likely to manifest in similar ways across instruments, and many of these sources of contamination can be mitigated once the source is identified.STAMPAenArticle10.1088/1538-3873/ad31222-s2.0-85190746749https://iopscience.iop.org/article/10.1088/1538-3873/ad3122https://api.elsevier.com/content/abstract/scopus_id/85190746749FIS/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