{"id":376,"date":"2026-04-28T13:44:23","date_gmt":"2026-04-28T13:44:23","guid":{"rendered":"https:\/\/caos-gw.unipg.it\/vacuum-towers\/"},"modified":"2026-05-05T20:31:52","modified_gmt":"2026-05-05T20:31:52","slug":"vacuum-towers","status":"publish","type":"page","link":"https:\/\/caos-gw.unipg.it\/en\/what-is-caos\/vacuum-towers\/","title":{"rendered":"Vacuum towers"},"content":{"rendered":"<style type=\"text\/css\">\n#foogallery-gallery-258 .fg-image { width: 200px; }<\/style>\n\t\t\t<div class=\"foogallery foogallery-container foogallery-carousel foogallery-lightbox-foogallery fg-carousel fg-ready fg-light fg-round-small fg-shadow-medium fg-loading-default fg-loaded-fade-in fg-hover-semi-zoomed fg-hover-fade fg-hover-circle-plus2\" id=\"foogallery-gallery-258\" 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class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/01.-20240905_131519__little.jpg\" data-attachment-id=\"348\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/01_-20240905_131519__little\/2998915697.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/02.-20240905_155058__little.jpg\" data-attachment-id=\"349\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/02_-20240905_155058__little\/2501838690.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/03.-20251106_112202__little.jpg\" data-attachment-id=\"352\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/03_-20251106_112202__little\/1551165769.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/04.-20260121_112517__little.jpg\" data-attachment-id=\"353\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/04_-20260121_112517__little\/1212949087.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/05.-20260121_141038__little.jpg\" data-attachment-id=\"354\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/05_-20260121_141038__little\/3397423728.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span 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href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/07.-20260325_143414__little.jpg\" data-attachment-id=\"356\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/07_-20260325_143414__little\/3710014134.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/08.-WhatsApp-Image-2026-04-03-at-09.22.14_little.jpg\" data-attachment-id=\"357\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/08_-WhatsApp-Image-2026-04-03-at-09_22_14_little\/3557954157.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/09.-20260403_091936__little.jpg\" data-attachment-id=\"358\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/09_-20260403_091936__little\/3735932084.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/10.-IMG20260403091635_little.jpg\" data-attachment-id=\"359\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/10_-IMG20260403091635_little\/2786057920.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/11.-20260403_130555__little.jpg\" data-attachment-id=\"360\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/11_-20260403_130555__little\/1466709342.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/12.-20260414_184632__little.jpg\" data-attachment-id=\"361\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/12_-20260414_184632__little\/3817441100.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a 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class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/14_-20260416_141927__little\/3094593781.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/15.-WhatsApp-Image-2026-04-03-at-10.31.23_little.jpg\" data-attachment-id=\"364\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/15_-WhatsApp-Image-2026-04-03-at-10_31_23_little\/3514513108.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/16.-20260428_185438__little.jpg\" data-attachment-id=\"365\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/16_-20260428_185438__little\/1370697863.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/17.-Una-e-mezza_little.jpg\" data-attachment-id=\"366\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/17_-Una-e-mezza_little\/3684991134.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/torravuoto2.jpg\" data-attachment-id=\"532\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/torravuoto2\/3884447183.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div><div class=\"fg-item fg-type-image fg-idle\"><figure class=\"fg-item-inner\"><a href=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/04\/torriavuoto1.jpg\" data-attachment-id=\"533\" data-type=\"image\" class=\"fg-thumb\"><span class=\"fg-image-wrap\"><img decoding=\"async\" width=\"200\" height=\"200\" class=\"skip-lazy fg-image\" data-src-fg=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/cache\/2026\/04\/torriavuoto1\/1915691395.jpg\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%20viewBox%3D%220%200%20200%20200%22%3E%3C%2Fsvg%3E\" loading=\"eager\"><\/span><span class=\"fg-image-overlay\"><\/span><\/a><\/figure><div class=\"fg-loader\"><\/div><\/div>\t<\/div>\n\t<div class=\"fg-carousel-bottom\"><\/div>\n\t<div class=\"fg-carousel-progress\"><\/div>\n\t<button type=\"button\" class=\"fg-carousel-next\" title=\"Next\"><\/button>\n<\/div>\n<p>Gravitational wave detectors operate in Ultra-High Vacuum. This serves both to ensure the correct propagation of laser light without obstacles and to eliminate thermal noise and molecular vibrations.<br\/>The two 15-meter towers at CAOS are connected in a single vacuum chamber served by mechanical and molecular pumps that together reach an internal pressure of 10<sup>-8<\/sup> mbar.<br\/>In this environment, the <a href=\"https:\/\/caos-gw.unipg.it\/en\/what-is-caos\/superattenuators\/\" data-type=\"page\" data-id=\"144\">Superattenuators<\/a> can be tested under the same conditions in which they will then be used within the detectors.<br\/>The mass of the towers is carefully distributed along their height to ensure a level of stiffness that does not interfere with the operation of the seismic attenuation system they enclose.<br\/><br\/>These structures, designed for CAOS, represent an evolution of the Virgo towers and constitute a prototype for the <a href=\"https:\/\/einsteintelescope.eu\/\">Einstein Telescope<\/a>.<\/p>\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls=\"\" src=\"https:\/\/caos-gw.unipg.it\/wp-content\/uploads\/2026\/05\/timelapse_torre.mp4\"><\/video><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Gravitational wave detectors operate in Ultra-High Vacuum. This serves both to ensure the correct propagation of laser light without obstacles and to eliminate thermal noise and molecular vibrations.The two 15-meter towers at CAOS are connected in a single vacuum chamber served by mechanical and molecular pumps that together reach an internal pressure of 10-8 mbar.In [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":463,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-376","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/pages\/376","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/comments?post=376"}],"version-history":[{"count":3,"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/pages\/376\/revisions"}],"predecessor-version":[{"id":481,"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/pages\/376\/revisions\/481"}],"up":[{"embeddable":true,"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/pages\/463"}],"wp:attachment":[{"href":"https:\/\/caos-gw.unipg.it\/en\/wp-json\/wp\/v2\/media?parent=376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}