Question: Which high energy particle collider was completed first, the Tevatron or the Large Hadron Collider? 

<P0-S0> The ISR (standing for "Intersecting Storage Rings") was a particle accelerator at CERN. <P0-S1>  It was the world's first hadron collider, and ran from 1971 to 1984, with a maximum center of mass energy of 62 GeV. <P0-S2>  From its initial startup, the collider itself had the capability to produce particles like the J/ψ and the upsilon, as well as observable jet structure; however, the particle detector experiments were not configured to observe events with large momentum transverse to the beamline, leaving these discoveries to be made at other experiments in the mid-1970s. <P0-S3>  Nevertheless, the construction of the ISR involved many advances in accelerator physics, including the first use of stochastic cooling, and it held the record for luminosity at a hadron collider until surpassed by the Tevatron in 2004. <SEP> <P1-S0> ZZ dibosons are rare pairs of Z bosons. <P1-S1>  They were first observed by the experiments at the Large Electron–Positron Collider (ALEPH, DELPHI, L3 and OPAL). <P1-S2>  The first observation in a hadron collider was made by the scientists of DØ collaboration at Fermilab. <P1-S3>  They are force-carrying particles produced in proton–antiproton collisions at the Tevatron, the world’s second highest-energy particle accelerator (after the CERN Large Hadron Collider). <P1-S4>  The observation of the ZZ dibosons was announced at a Fermilab seminar on 30 July 2008. <SEP> <P2-S0> The Tevatron was a circular particle accelerator (now inactive, since 2011) in the United States, at the Fermi National Accelerator Laboratory (also known as "Fermilab"), just east of Batavia, Illinois, and holds the title of the second highest energy particle collider in the world, after the Large Hadron Collider (LHC) of the European Organization for Nuclear Research (CERN) near Geneva, Switzerland. <P2-S1>  The Tevatron was a synchrotron that accelerated protons and antiprotons in a 6.86 km, or 4.26 mi, ring to energies of up to 1 TeV, hence its name. <P2-S2>  The Tevatron was completed in 1983 at a cost of $120 million and significant upgrade investments were made in 1983–2011. <SEP> <P3-S0> The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider, most complex experimental facility ever built, and the largest single machine in the world. <P3-S1>  It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries, as well as hundreds of universities and laboratories. <P3-S2>  It lies in a tunnel 27 km in circumference, as deep as 175 m beneath the France–Switzerland border near Geneva, Switzerland. <P3-S3>  Its first research run took place from March 2010 to early 2013 at an energy of 3.5 to 4 teraelectronvolts (TeV) per beam (7 to 8 TeV total), about 4 times the previous world record for a collider. <P3-S4>  Afterwards, the accelerator was upgraded for two years. <P3-S5>  It was restarted in early 2015 for its second research run, reaching 6.5 TeV per beam (13 TeV total, the current world record).