{"id":260662,"date":"2017-08-09T12:27:02","date_gmt":"2017-08-09T16:27:02","guid":{"rendered":"http:\/\/www.rochester.edu\/newscenter\/?p=260662"},"modified":"2020-04-13T17:29:30","modified_gmt":"2020-04-13T21:29:30","slug":"high-pressure-stakes-high-energy-density-physics-university-rochester-260662","status":"publish","type":"post","link":"https:\/\/www.rochester.edu\/newscenter\/high-pressure-stakes-high-energy-density-physics-university-rochester-260662\/","title":{"rendered":"New research initiative turns laser focus on high-energy-density physics"},"content":{"rendered":"<p>Atoms behave much differently when squeezed to pressures more than a million\u2014or even a billion\u2014times the atmospheric pressure on Earth. Understanding how atoms react under such high-pressure conditions can lead to the creation of new materials and give scientists valuable insights into the make-up of stars and planets, as well as the universe itself.<\/p>\n<p>Those are among the reasons the University of Rochester has turned its attention to the relatively new field of high-energy-density physics. Another reason is that the University is well poised to make major contributions to the field.<\/p>\n<p>\u201cOur people and our resources put us in a unique position to gain crucial insights in the field of high-energy-density physics,\u201d says Provost and Senior Vice President for Research Rob Clark.<\/p>\n<p>Rochester\u2019s <strong><a href=\"http:\/\/www.lle.rochester.edu\/\">Laboratory for Laser Energetics<\/a><\/strong>, for example, is home to the OMEGA laser. At 10 meters tall and 100 meters long, the OMEGA is the world\u2019s largest university-based laser.<\/p>\n<p>Rochester has also recruited Gilbert \u201cRip\u201d Collins to lead a new, multidisciplinary research initiative for high-energy-density physics. Collins was previously the director of Lawrence Livermore National Laboratory\u2019s Center for High-Energy-Density Physics, and is now professor in the <strong><a href=\"http:\/\/www.me.rochester.edu\/\">Department of Mechanical Engineering<\/a><\/strong> and the <a href=\"http:\/\/www.pas.rochester.edu\/\"><strong>Department of Physics and Astronomy<\/strong>,<\/a> as well as senior scientist at the University\u2019s Laboratory for Laser Energetics. Collins says the initiative \u201cwill make it easier to collaborate between chemistry, engineering, physics, and astronomy,\u201d leading to faster advances in the field.<\/p>\n<p>Collins studies, among other things, how atoms bond under conditions of extreme pressure. Typically, it\u2019s the outermost electrons of an atom that react with the electrons of other atoms. But when the pressure on the atoms is greatly increased, the inner electrons get involved, and that\u2019s when the fun begins.<\/p>\n<figure id=\"attachment_262022\" aria-describedby=\"caption-attachment-262022\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-262022 size-full\" src=\"https:\/\/www.rochester.edu\/newscenter\/wp-content\/uploads\/2017\/08\/high-energy-density-physics.jpg\" alt=\"High Energy Density Physics using the Omega Laser. How high is high? The OMEGA laser can produce the equivalent of 100 billion atmospheres of pressure. That's the equivalent of 12 fully loaded Ninitz class aircraft carriers balanced on one square millimeter. What happens to carbon under pressure? Carbon is a great example of how high-energy-density-physics can fundamentally change the properties of matter; extreme chemistry matters. Pressure affects atomic bonds. At atomic pressures (~300 million atmospheres) the atoms themselves are fundamentally changed. \" width=\"1000\" height=\"773\" srcset=\"https:\/\/www.rochester.edu\/newscenter\/wp-content\/uploads\/2017\/08\/high-energy-density-physics.jpg 1000w, https:\/\/www.rochester.edu\/newscenter\/wp-content\/uploads\/2017\/08\/high-energy-density-physics-630x487.jpg 630w, https:\/\/www.rochester.edu\/newscenter\/wp-content\/uploads\/2017\/08\/high-energy-density-physics-768x594.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-262022\" class=\"wp-caption-text\">(University illustration \/ Michael Osadciw)<\/figcaption><\/figure>\n<p>\u201cUnder extreme pressure, the chemical properties of the elements that we\u2019re familiar with no longer apply,\u201d he says. \u201cWe need new periodic tables for different pressure conditions.\u201d<\/p>\n<p>Diamond is one well-known material that forms under high pressure. Place carbon 100 miles deep into the earth\u2014where the pressure is nearly 50,000 times greater than what exists on the earth\u2019s surface and the temperatures are above 2,000 degrees Fahrenheit\u2014and the atoms become highly organized in a structure we call a diamond.<\/p>\n<p>Yet that level of pressure is at the low end of the scale when it comes to high-energy-density physics. At more extreme pressures, such as two million atmospheres, sodium is converted into an insulator; at 10 million atmospheres, it\u2019s believed that hydrogen can be turned into a superconducting superfluid; and when pressures exceed 200 million atmospheres, it may be possible to make aluminum transparent.<\/p>\n<p>The OMEGA laser allows researchers to achieve such pressures.<\/p>\n<p>\u201cMany people think of lasers as a source of intense heat,\u201d says Collins. \u201cLasers can also operate as a source of highly focused pressure, and the OMEGA laser allows us to study materials at pressures of millions to billions of atmospheres.\u201d Understanding how atoms behave under extreme pressures will enable researchers \u201cto purposefully manipulate matter to form somewhat new, exotic materials,\u201d he adds.<\/p>\n<p>Robert McCrory, vice president and director of the Laboratory for Laser Energetics, says Collins, who enjoys an international reputation, \u201cis superbly fit to lead the effort at the University.\u201d He notes that facilities such as the laser lab, the National Ignition Facility at Lawrence Livermore, where Collins was employed before, as well as the Z machine at Sandia National Laboratories, \u201chave opened the new high- energy-density physics frontier\u201d and secured American leadership in the field.<\/p>\n<p>But there\u2019s even more to high-energy-density physics than creating new materials. Michael Campbell, deputy director of the Laboratory for Laser Energetics, calls the field an \u201cenduring science.\u201d<\/p>\n<p>\u201cThere will always be new areas to explore, including the nature of the universe itself,\u201d he says. \u201cThe pressure at the center of planets exceeds millions of atmospheres and hundreds of billions for stars. High-energy-density physics can be key to helping us learn what planets and stars are made of, whether, like earth, they have magnetic fields, and how radiation and energy flow within our sun and other stars.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gilbert \u201cRip\u201d Collins, formerly of Lawrence Livermore National Laboratory, will lead a multidisciplinary initiative in Rochester to study how atoms behave at extreme pressures.<\/p>\n","protected":false},"author":16,"featured_media":261822,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[116],"tags":[29502,33312,5296,23252,33322],"class_list":["post-260662","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sci-tech","tag-featured-post-side","tag-high-energy-density-physics","tag-laboratory-for-laser-energetics","tag-planets","tag-rip-collins"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>New research initiative turns laser focus on high-energy-density physics<\/title>\n<meta name=\"description\" content=\"Gilbert \u201cRip\u201d Collins will lead a multidisciplinary initiative in Rochester to study how atoms behave at extreme pressures.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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