{"id":7700,"date":"2015-05-05T09:40:09","date_gmt":"2015-05-05T13:40:09","guid":{"rendered":"http:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7700"},"modified":"2015-05-05T11:06:19","modified_gmt":"2015-05-05T15:06:19","slug":"first-collisions-of-run-2","status":"publish","type":"post","link":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7700","title":{"rendered":"First Collisions of Run 2"},"content":{"rendered":"<p>This morning in Geneva saw the first collisions in the revamped LHC, there&#8217;s an event display from ATLAS <a href=\"https:\/\/cds.cern.ch\/record\/2014009\">here<\/a>, CMS <a href=\"https:\/\/cds.cern.ch\/record\/2014040\">here<\/a>.<\/p>\n<p>These collisions are just at the injection energy of 450 GeV\/beam, but over the past few weeks beams have been successfully ramped up (without intentional collisions, although see page 23 <a href=\"https:\/\/indico.cern.ch\/event\/385864\/contribution\/0\/material\/slides\/1.pdf\">here<\/a>) to the planned 6.5 TeV\/beam.  6.5 TeV beams have been accelerated not just with probe intensity, but with nominal bunch intensity and squeeze.  They are roughly halfway through a planned 8 week beam commissioning process and on schedule, with stable beams for physics collisions still planned for around June 1.   For quite a while now, 6.5 TeV\/beam collisions have been possible, but no word yet on when this is planned for, I assume there will be some sort of media event at that time. <\/p>\n<p><strong>Update<\/strong>: Something about this from CERN <a href=\"http:\/\/home.web.cern.ch\/about\/updates\/2015\/05\/low-energy-collisions-tune-lhc-experiments\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This morning in Geneva saw the first collisions in the revamped LHC, there&#8217;s an event display from ATLAS here, CMS here. These collisions are just at the injection energy of 450 GeV\/beam, but over the past few weeks beams have &hellip; <a href=\"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7700\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-7700","post","type-post","status-publish","format-standard","hentry","category-experimental-hep-news"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7700"}],"version-history":[{"count":3,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7700\/revisions"}],"predecessor-version":[{"id":7703,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7700\/revisions\/7703"}],"wp:attachment":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}