Technical Design Report of the ALICE Forward Calorimeter (FoCal)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">     <html xmlns="http://www.w3.org/1999/xhtml" lang="pt" xml:lang="pt" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Technical Design Report of the ALICE Forward Calorimeter (FoCal) - CERN Document Server</title> <link href='https://framework.web.cern.ch/framework/2.0/fonts/PTSansWeb/PTSansWeb.css' rel='stylesheet' type='text/css' /> <link rel="stylesheet" href="http://cds.cern.ch/img/invenio.css?v=20141127" type="text/css" /> <link rel="stylesheet" href="http://cds.cern.ch/img/cern_theme/css/cern_theme.css?v=20141127" type="text/css" /> <link rel="stylesheet"href="/css/font-awesome.min.css"> <meta http-equiv="X-UA-Compatible" content="IE=Edge"/> <link rel="stylesheet" href="http://cds.cern.ch/img/cern_toolbar/css/toolbar.css" type="text/css" />    <link rel="canonical" href="http://cds.cern.ch/record/2890281/files/" /> <link rel="alternate" hreflang="el" href="http://cds.cern.ch/record/2890281/files/?ln=el" /> <link rel="alternate" hreflang="fr" href="http://cds.cern.ch/record/2890281/files/?ln=fr" /> <link rel="alternate" hreflang="bg" href="http://cds.cern.ch/record/2890281/files/?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="http://cds.cern.ch/record/2890281/files/?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="http://cds.cern.ch/record/2890281/files/?ln=pt" /> <link rel="alternate" hreflang="no" href="http://cds.cern.ch/record/2890281/files/?ln=no" /> <link rel="alternate" hreflang="hr" href="http://cds.cern.ch/record/2890281/files/?ln=hr" /> <link rel="alternate" hreflang="ca" href="http://cds.cern.ch/record/2890281/files/?ln=ca" /> <link rel="alternate" hreflang="de" href="http://cds.cern.ch/record/2890281/files/?ln=de" /> <link rel="alternate" hreflang="it" href="http://cds.cern.ch/record/2890281/files/?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="http://cds.cern.ch/record/2890281/files/?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="http://cds.cern.ch/record/2890281/files/?ln=sv" /> <link rel="alternate" hreflang="sk" href="http://cds.cern.ch/record/2890281/files/?ln=sk" /> <link rel="alternate" hreflang="en" href="http://cds.cern.ch/record/2890281/files/?ln=en" /> <link rel="alternate" hreflang="pl" href="http://cds.cern.ch/record/2890281/files/?ln=pl" /> <link rel="alternate" hreflang="ru" href="http://cds.cern.ch/record/2890281/files/?ln=ru" /> <link rel="alternate" hreflang="ka" href="http://cds.cern.ch/record/2890281/files/?ln=ka" /> <link rel="alternate" hreflang="ja" href="http://cds.cern.ch/record/2890281/files/?ln=ja" /> <link rel="alternate" hreflang="es" href="http://cds.cern.ch/record/2890281/files/?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="http://cds.cern.ch/rss" /> <link rel="search" type="application/opensearchdescription+xml" href="http://cds.cern.ch/opensearchdescription" title="CERN Document Server" /> <link rel="unapi-server" type="application/xml" title="unAPI" href="http://cds.cern.ch/unapi" /> <link rel="apple-touch-icon" href="/apple-touch-icon.png"/> <link rel="apple-touch-icon-precomposed" href="/apple-touch-icon-precomposed.png"/> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="pt" /> <meta name="description" content="This report presents the technical design of the ALICE Forward Calorimeter (FoCal). FoCal is an upgrade of the ALICE experiment at the LHC, to be installed during Long Shutdown 3 for data-taking in the period 2029-2032. FoCal consists of a highly granular Si+W electromagnetic calorimeter combined with a Cu+scintillating-fiber hadronic calorimeter, covering pseudo-rapidity $3.2<\eta<5.8$. FoCal has unique capabilities to measure direct photon production at forward rapidity, which probes the gluon distribution in protons and nuclei at small-$x$, and is theoretically calculable at high precision. FoCal will carry out inclusive and correlation measurements of photons, neutral mesons, and jets in hadronic pp and p-Pb collisions, as well as J/$\psi$ production in ultra-peripheral p-Pb and Pb-Pb collisions. FoCal extends significantly the scope of the ALICE physics program to explore the dynamics of hadronic matter and the nature of QCD evolution at small $x$, down to $x\sim10^{-6}$. 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Technical Design Report of the ALICE Forward Calorimeter (FoCal) - CERN Document Server