{"id":1306,"date":"2021-12-17T14:14:12","date_gmt":"2021-12-17T21:14:12","guid":{"rendered":"https:\/\/www.irlabs.com\/?p=1306"},"modified":"2023-08-30T14:41:13","modified_gmt":"2023-08-30T21:41:13","slug":"ir-labs-designs-constructs-and-tests-dewar-for-shark-nir","status":"publish","type":"post","link":"https:\/\/www.irlabs.com\/ir-labs-designs-constructs-and-tests-dewar-for-shark-nir\/","title":{"rendered":"IRLabs Designs, Constructs, and Tests Dewar for SHARK-NIR"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1248px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-0 fusion_builder_column_inner_3_4 3_4 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:75%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.56%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.56%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\" style=\"--awb-text-transform:none;\"><h4>Overview<\/h4>\n<p>Exoplanet research and characterization are the main purposes of the Large Binocular Telescope (LBT) located on Mt. Graham in southeastern Arizona. The telescope\u2019s binocular design combined with impressive adaptive optics provides the large effective aperture, high angular resolution, low thermal background, and exceptional sensitivity for detecting faint objects. The LBT has two identical 8.4m telescopes mounted side-by-side on a common altitude-azimuth mounting.<\/p>\n<p>At the heart of the telescope are a pair of SHARK (<strong>S<\/strong>ystem for coronagraphy with <strong>H<\/strong>igh <strong>A<\/strong>daptive optics from <strong>R<\/strong> to <strong>K<\/strong> band) instruments. The SHARK-NIR (near infrared) and SHARK-VIS (visible light) will be used together to observe exoplanets. IRLabs designed, manufactured, and tested the dewar for the SHARK-NIR instrument and cooling platform for its HAWAII-2RG detector.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-four\"><h4 class=\"fusion-title-heading title-heading-left\" style=\"margin:0;\">Watch Video<\/h4><\/div><div class=\"fusion-video fusion-youtube\" style=\"--awb-max-width:750px;--awb-max-height:422px;\"><div class=\"video-shortcode\"><div class=\"fluid-width-video-wrapper\" style=\"padding-top:56.27%;\" ><iframe title=\"YouTube video player 1\" src=\"https:\/\/www.youtube.com\/embed\/bIFf2smYkOI?wmode=transparent&autoplay=0&amp;rel=0\" width=\"750\" height=\"422\" allowfullscreen allow=\"autoplay; fullscreen\"><\/iframe><\/div><\/div><\/div><div class=\"fusion-text fusion-text-2\" style=\"--awb-text-transform:none;\"><h4>Key Facts<\/h4>\n<p><strong>Project:<\/strong> SHARK-NIR Instrument for Large Binocular Telescope<br \/>\n<strong>Clients:<\/strong> <a href=\"https:\/\/www.oapd.inaf.it\/\" target=\"_blank\" rel=\"noopener\">INAF-Padova<\/a> and <a href=\"https:\/\/www.as.arizona.edu\/\" target=\"_blank\" rel=\"noopener\">UArizona Steward Observatory<\/a><br \/>\n<strong>Project Location:<\/strong> United States<br \/>\n<strong>Application:<\/strong> <a href=\"https:\/\/www.irlabs.com\/industries\/astronomy\/\">Astronomy<\/a><br \/>\n<strong>IRLabs Product:<\/strong> <a href=\"https:\/\/www.irlabs.com\/products\/cryostats\/customized-cryostats\/\">Customized NDL dual-vessel liquid nitrogen dewar<\/a><\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-1 fusion_builder_column_inner_1_4 1_4 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:25%;--awb-margin-top-large:0px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:7.68%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"1882\" height=\"1247\" alt=\"Large Binocular Telescope using SHARK-NIR instrument\" title=\"Large Binocular Telescope (LBT)\" src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1.jpg\" data-orig-src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1.jpg\" class=\"lazyload img-responsive wp-image-1308\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271882%27%20height%3D%271247%27%20viewBox%3D%270%200%201882%201247%27%3E%3Crect%20width%3D%271882%27%20height%3D%271247%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1-200x133.jpg 200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1-400x265.jpg 400w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1-600x398.jpg 600w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1-800x530.jpg 800w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1-1200x795.jpg 1200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1.jpg 1882w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-3\" style=\"--awb-text-transform:none;\"><p style=\"text-align: left;\"><span style=\"font-size: 12pt;\"><em>Large Binocular Telescope (LBT), Mt. Graham, Arizona, is an international collaboration of the <a href=\"https:\/\/www.as.arizona.edu\/\" target=\"_blank\" rel=\"noopener\">University of Arizona Steward Observatory<\/a> in the US, <a href=\"https:\/\/www.oapd.inaf.it\/\" target=\"_blank\" rel=\"noopener\">INAF- Astronomical Observatory of Padova<\/a> in Italy, LBT-Beteiligungsgesellschaft\u00a0 in Germany, and the Ohio State University Research Corporation, representing the University of Minnesota, University of Virginia, and the University of Notre Dame in the US.<\/em><\/span><\/p>\n<\/div><\/div><\/div><\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-2 fusion_builder_column_inner_3_4 3_4 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:75%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.56%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.56%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-4\" style=\"--awb-text-transform:none;\"><h4>Challenges<\/h4>\n<p>There were several thermal management and opto-mechanical requirements that were unique to the SHARK-NIR instrument including:<\/p>\n<ul>\n<li>Extended hold time of more than 30 hours: Extended hold time was required throughout the full range of motion including 190\u2070 rotation of the instrument and 90\u2070 altitude of the telescope at the zenith of its alt-azimuth mount.<\/li>\n<li>Maintain an optically centered array during full range of motion: The array needed to be optically centered throughout the full range of instrument and telescope rotation.<\/li>\n<li>Evolving adaptive optics (AO) criteria: Understanding of the applied AO evolved during the project, driving several new requirements for the dewar.\u00a0 Dewar design needed to adapt along with AO.<\/li>\n<li>Repeatable demount and precision remount: The dewar needed to be removed manually for convenient servicing and remounted to its precise position.<\/li>\n<li>Remote and manual heat switch operation: Telescope users need to operate the heat switch remotely and manually.<\/li>\n<\/ul>\n<\/div><div class=\"fusion-text fusion-text-5\" style=\"--awb-text-transform:none;\"><h4>Solution<\/h4>\n<p>Starting with our founder, Dr. Frank Low, IRLabs has decades of experience in solving challenges in IR astronomy. Our engineering team worked closely with INAF-Padova and Steward Observatory to design, produce and test a customized dewar that met unique specifications of the SHARK-NIR.<\/p>\n<p>To achieve extended hold times the dewar uses a dual vessel configuration. The outer vessel cools the radiation shield to prevent heat transfer to the inner section, maintaining the required 77 K temperature and low background for the HAWAII-2RG detector. In addition, LN2 volume management maintains the required temperatures throughout system travel and extended hold time of more than 30 hours.<\/p>\n<p>The array is required to remain optically centered throughout the instrument\u2019s movement. The traditional support structure that suspends the vessels from only the neck of the dewar would not meet these opto-mechanical requirements. We designed an internal structure to be supported at both ends using low thermal conductivity materials. This sturdy structure holds the array within specification during movement.<\/p>\n<p>The adaptive optics subassembly was being better understood and evolving during the project, driving several new requirements for the dewar including relocating the optical port during manufacturing. These are the challenges of science that we have the experience and service commitment to tackle and adapt to.<\/p>\n<p>For repeatable demounting and precise remounting during servicing, we used the instrument\u2019s weight and center of mass when filled with cryogens, to correctly design and install mounting points and pins for precise remounting.<\/p>\n<p>We designed the heat switch to operate either remotely or manually, allowing for the necessary increased operating temperature at the cold stage, while maintaining a high system hold time.<\/p>\n<p>IRLabs\u2019 experience in cryogenic and optical systems, our understanding of the challenges of IR astronomy, and our adaptability during the project make us a trusted solution provider for unique and challenging projects.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-3 fusion_builder_column_inner_1_4 1_4 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:25%;--awb-margin-top-large:0px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:7.68%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><img decoding=\"async\" width=\"877\" height=\"522\" alt=\"Illustration of two vessel configurations of IRLabs customized NDL dual-vessel liquid nitrogen dewar\" title=\"Illustration of two vessel configuration of IRLabs customized NDL dual-vessel liquid nitrogen dewar\" src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot.png\" data-orig-src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot.png\" class=\"lazyload img-responsive wp-image-1321\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27877%27%20height%3D%27522%27%20viewBox%3D%270%200%20877%20522%27%3E%3Crect%20width%3D%27877%27%20height%3D%27522%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot-200x119.png 200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot-400x238.png 400w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot-600x357.png 600w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot-800x476.png 800w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/Range-of-Motion-screen-shot.png 877w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-6\" style=\"--awb-text-transform:none;\"><p style=\"text-align: center;\"><em>Dual vessel configuration and LN<sub>2<\/sub> volume management maintained required temperatures through system travel and extended hold time of more than 30 hours.<\/em><\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-3 hover-type-none\"><img decoding=\"async\" width=\"1716\" height=\"1020\" alt=\"Illustration of IRLabs customized NDL dual-vessel liquid nitrogen dewar\" title=\"Illustration of IRLabs customized NDL dual-vessel liquid nitrogen dewar\" src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case.jpg\" data-orig-src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case.jpg\" class=\"lazyload img-responsive wp-image-1322\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271716%27%20height%3D%271020%27%20viewBox%3D%270%200%201716%201020%27%3E%3Crect%20width%3D%271716%27%20height%3D%271020%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case-200x119.jpg 200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case-400x238.jpg 400w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case-600x357.jpg 600w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case-800x476.jpg 800w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case-1200x713.jpg 1200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/transparent-case.jpg 1716w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-7\" style=\"--awb-text-transform:none;\"><p style=\"text-align: center;\"><em>The sturdy internal support structure (in blue) will keep the array optically centered throughout the instrument\u2019s full range of motion.<\/em><\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-4 hover-type-none\"><img decoding=\"async\" width=\"2560\" height=\"1440\" alt=\"Heat switch in IRLabs customized NDL dual-vessel liquid nitrogen dewar\" title=\"Heat switch in IRLabs customized NDL dual-vessel liquid nitrogen dewar\" src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-scaled.jpg\" data-orig-src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-scaled.jpg\" class=\"lazyload img-responsive wp-image-1320\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%272560%27%20height%3D%271440%27%20viewBox%3D%270%200%202560%201440%27%3E%3Crect%20width%3D%272560%27%20height%3D%271440%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-200x113.jpg 200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-400x225.jpg 400w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-600x338.jpg 600w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-800x450.jpg 800w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-1200x675.jpg 1200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/internal_wire_motor_06_heat-switch-scaled.jpg 2560w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-8\" style=\"--awb-text-transform:none;\"><p style=\"text-align: center;\"><em>Heat switch operated by remote motor drive or manual drive.<\/em><\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-5 hover-type-none\"><img decoding=\"async\" width=\"1818\" height=\"1726\" alt=\"Customized IRLabs customized NDL dual-vessel liquid nitrogen dewar for SHARK-NIRNDL dual-vessel liquid nitrogen dewar for HARK-NIR\" title=\"IRLabs customized NDL dual-vessel liquid nitrogen dewar for SHARK-NIR\" src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02.jpg\" data-orig-src=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02.jpg\" class=\"lazyload img-responsive wp-image-1323\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271818%27%20height%3D%271726%27%20viewBox%3D%270%200%201818%201726%27%3E%3Crect%20width%3D%271818%27%20height%3D%271726%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02-200x190.jpg 200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02-400x380.jpg 400w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02-600x570.jpg 600w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02-800x760.jpg 800w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02-1200x1139.jpg 1200w, https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/at_20-degrees_02.jpg 1818w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-9\" style=\"--awb-text-transform:none;\"><p style=\"text-align: center;\"><em>Special fixtures were used during testing and validation at the extreme orientations of the instrument during its full range of motion.<\/em><\/p>\n<\/div><\/div><\/div><\/div><div class=\"fusion-text fusion-text-10\" style=\"--awb-text-transform:none;\"><h4>More Information<\/h4>\n<ul>\n<li><a href=\"https:\/\/sites.google.com\/inaf.it\/shark-nir\/home\">About SHARK-NIR<\/a><\/li>\n<li><a href=\"https:\/\/www.oapd.inaf.it\/\">INAF-Padova<\/a><\/li>\n<li><a href=\"https:\/\/www.as.arizona.edu\/CAAO\/index.html\">UArizona Department of Astronomy and Steward Observatory<\/a><\/li>\n<li><a href=\"https:\/\/www.as.arizona.edu\/CAAO\/index.html\">UArizona Center for Astronomical Adaptive Optics<\/a><\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>At the heart of the Large Binocular Telescope is the pair of SHARK-NIR instruments which will used used together to observe exoplanets. Our engineering team worked closely with INAF-Padova and Steward Observatory to design, produce and test a customized dewar that met unique specifications of the SHARK-NIR.<\/p>\n","protected":false},"author":4,"featured_media":1308,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>IRLabs Designs, Constructs, and Tests Dewar for SHARK-NIR - IRLabs<\/title>\n<meta name=\"description\" content=\"The Large Binocular Telescope will use a pair of SHARK-NIR instruments together to observe exoplanets. 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Our engineering team worked closely with INAF-Padova and Steward Observatory to design, produce and test a customized dewar that met unique specifications of the SHARK-NIR.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.irlabs.com\/ir-labs-designs-constructs-and-tests-dewar-for-shark-nir\/\" \/>\n<meta property=\"og:site_name\" content=\"IRLabs\" \/>\n<meta property=\"article:published_time\" content=\"2021-12-17T21:14:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-30T21:41:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1882\" \/>\n\t<meta property=\"og:image:height\" content=\"1247\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Chris Foster\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Chris Foster\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.irlabs.com\/ir-labs-designs-constructs-and-tests-dewar-for-shark-nir\/\",\"url\":\"https:\/\/www.irlabs.com\/ir-labs-designs-constructs-and-tests-dewar-for-shark-nir\/\",\"name\":\"IRLabs Designs, Constructs, and Tests Dewar for SHARK-NIR - IRLabs\",\"isPartOf\":{\"@id\":\"https:\/\/www.irlabs.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.irlabs.com\/ir-labs-designs-constructs-and-tests-dewar-for-shark-nir\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.irlabs.com\/ir-labs-designs-constructs-and-tests-dewar-for-shark-nir\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.irlabs.com\/wp-content\/uploads\/2021\/12\/SHARK-NIR-INAFP_SO-SoW-001-Dewar_Issue0.1.jpg\",\"datePublished\":\"2021-12-17T21:14:12+00:00\",\"dateModified\":\"2023-08-30T21:41:13+00:00\",\"author\":{\"@id\":\"https:\/\/www.irlabs.com\/#\/schema\/person\/fd11812ff1cfd9c1953335c5a30ac6bb\"},\"description\":\"The Large Binocular Telescope will use a pair of SHARK-NIR instruments together to observe exoplanets. 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