{"id":35879,"date":"2026-02-23T21:36:26","date_gmt":"2026-02-23T15:51:26","guid":{"rendered":"https:\/\/www.revoscience.com\/en\/?p=35879"},"modified":"2026-02-23T21:36:28","modified_gmt":"2026-02-23T15:51:28","slug":"cern-begins-cooldown-of-hilumi-lhc-test-stand-in-major-upgrade-milestone","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/cern-begins-cooldown-of-hilumi-lhc-test-stand-in-major-upgrade-milestone\/","title":{"rendered":"CERN begins cooldown of HiLumi LHC test stand in major upgrade milestone"},"content":{"rendered":"\n

Scientists at CERN have triggered the complex cooldown of a 95-m-long test stand that reproduces the underground configuration of innovative technologies for the Large Hadron Collider\u2019s high-luminosity upgrade\u00a0<\/strong><\/em><\/p>\n\n\n\n

\"\"
View of the IT String magnet line (Image: CERN)<\/sup><\/em><\/figcaption><\/figure>\n\n\n\n

GENEVA, Feb 23 <\/strong>\u2013 CERN has begun cooling a full-scale test stand for the High-Luminosity Large Hadron Collider (HiLumi LHC) to 1.9 Kelvin (\u2011271.3 \u00b0C), marking a key milestone in its flagship upgrade project.<\/p>\n\n\n\n

The 95-metre-long \u201cInner Triplet String\u201d replicates the new magnet system and infrastructure that will be installed in the collider during a four-year shutdown starting this summer. The HiLumi LHC, due to start operations in 2030, is designed to increase collision rates tenfold, enabling physicists to probe the Higgs boson and other particles with unprecedented precision.<\/p>\n\n\n\n

\u201cThis is the largest project undertaken by CERN in the past 20 years,\u201d Director-General Mark Thomson said. \u201cIt will allow us to understand how the Higgs boson interacts with itself \u2013 a measurement that could shed light on the origins and fate of the Universe.\u201d<\/p>\n\n\n\n

The upgrade introduces technologies never before used in a proton accelerator, including superconducting crab cavities, crystal collimators and high-temperature superconducting transfer lines. Central to the project are new niobium\u2013tin magnets, capable of generating stronger fields than the collider\u2019s current niobium\u2013titanium magnets.<\/p>\n\n\n\n

\u201cAll systems have been tested individually. The IT String validates their integration under operational conditions,\u201d said Oliver Br\u00fcning, CERN\u2019s Director for Accelerators and Technology.<\/p>\n\n\n\n

The HiLumi LHC project involves nearly 50 institutes across more than 20 countries, with contributions from CERN member states and partners including the United States, Japan, Canada and China. The cooldown process, using liquid helium refrigeration, is expected to take several weeks.<\/p>\n","protected":false},"excerpt":{"rendered":"

GENEVA, Feb 23 \u2013 CERN has begun cooling a full-scale test stand for the High-Luminosity Large Hadron Collider (HiLumi LHC) to 1.9 Kelvin (\u2011271.3 \u00b0C), marking a key milestone in its flagship upgrade project.<\/p>\n","protected":false},"author":2,"featured_media":35880,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-35879","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physics"],"featured_image_urls":{"full":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN.webp",1440,960,false],"thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-200x200.webp",200,200,true],"medium":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-675x450.webp",675,450,true],"medium_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-768x512.webp",750,500,true],"large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-1100x733.webp",750,500,true],"1536x1536":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN.webp",1440,960,false],"2048x2048":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN.webp",1440,960,false],"ultp_layout_landscape_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-1200x800.webp",1200,800,true],"ultp_layout_landscape":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-870x570.webp",870,570,true],"ultp_layout_portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-600x900.webp",600,900,true],"ultp_layout_square":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-600x600.webp",600,600,true],"newspaper-x-single-post":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-760x490.webp",760,490,true],"newspaper-x-recent-post-big":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-550x360.webp",550,360,true],"newspaper-x-recent-post-list-image":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-95x65.webp",95,65,true],"web-stories-poster-portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-640x853.webp",640,853,true],"web-stories-publisher-logo":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-96x96.webp",96,96,true],"web-stories-thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2026\/02\/View-of-the-IT-String-magnet-line-Image-CERN-150x100.webp",150,100,true]},"author_info":{"info":["RevoScience"]},"category_info":"Physics<\/a>","tag_info":"Physics","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/35879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/comments?post=35879"}],"version-history":[{"count":1,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/35879\/revisions"}],"predecessor-version":[{"id":35881,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/35879\/revisions\/35881"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media\/35880"}],"wp:attachment":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media?parent=35879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/categories?post=35879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/tags?post=35879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}