{"id":171,"date":"2020-10-26T14:13:40","date_gmt":"2020-10-26T13:13:40","guid":{"rendered":"\/?page_id=171"},"modified":"2021-01-26T10:25:46","modified_gmt":"2021-01-26T09:25:46","slug":"cold-2","status":"publish","type":"page","link":"https:\/\/spheres.ino.cnr.it\/index.php\/research\/development-of-gas-analyzers\/cold-2\/","title":{"rendered":"COLD 2"},"content":{"rendered":"\n
\"\"<\/figure><\/div>\n\n\n

COLD (Carbon Monoxide Laser Detector) 2 is a gas analyzer, tailored for the measurement of ambient carbon monoxide from the ground up to stratosphere, where the mixing ratio can drop down to a few ppb.<\/p>\n

It is based on the absorption of radiation at 4.7 micron, emitted by a room temperature Quantum Cascade Laser, iside a multipass cell, 36 m pathlength.<\/p>\n

It is the evolution of the instrument COLD (Cryogenically Operated Laser Diode). In that case the laser was a lead salts laser, operating at temperatures slightly above Liquid Nitrogen boiling temperature. In the photo below, the central plastic disk is the cover of the LN Dewar.<\/p>\n\n\n

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The change from cryogenic laser to room temperature laser was accompanied by a complete revision of the electronics, so that the dimensions and weight were substancially reduced.<\/p>\n

The instrument was originally designed to be deployed onboard M55 “Geophysica” aircraft (1500 kg payload, 21.000 m ceilings height).<\/p>\n\n\n

\"\"<\/figure><\/div>\n\n\n

It was recently adapted to fly onboard a Zero Pressure Balloon, up to 34 km height.<\/p>\n\n\n

\"\"<\/figure><\/div>\n\n\n

At the moment it is under restyling, in order to be deployed onboard NASA WB-57, for the ACCLIP<\/a> campaign.<\/p>\n\n\n

\n
\n
\"\"
Altitude vs CO mixing ratio for all the flights of the STRATOCLIM campaign in 2017<\/figcaption><\/figure>\n<\/div>\n\n\n\n
\n
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CO mixing ratio and altitude vs time for the STRATOCLIM flight on August 6, 2017<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n

References:<\/h4>\n

S. Bucci, B. Legras, P. Sellitto, F. D’Amato, S. Viciani, A. Montori, A. Chiarugi, F. Ravegnani, A. Ulanovsky, F. Cairo, and F. Stroh: “Deep convective influence on the UTLS composition in the Asian Monsoon Anticyclone region: 2017 StratoClim campaign results”, Atmos. Chem. Phys. 20, 12193-12210 (2020), doi: 10.5194\/acp-20-12193-2020<\/a><\/p>\n

S. Viciani, A. Montori, A. Chiarugi and F D\u2019Amato: “A Portable Quantum Cascade Laser Spectrometer for Atmospheric Measurements of Carbon Monoxide”, Sensors 18, 2380 (2018), doi: 10.3390\/s18072380<\/a><\/p>\n

S. Viciani, F. D\u2019Amato, P. Mazzinghi, F. Castagnoli, G. Toci, P.W. Werle: “A cryogenically operated laser diode spectrometer for airborne measurement of stratospheric trace gases”, Appl. Phys. B 90, pp. 581-592 (2008), doi: 10.1007\/s00340-007-2885-2<\/a><\/p>","protected":false},"excerpt":{"rendered":"

COLD (Carbon Monoxide Laser Detector) 2 is a gas analyzer, tailored for the measurement of ambient carbon monoxide from the ground up to stratosphere, where the mixing ratio can drop […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":90,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-templates\/page_fullwidth.php","meta":{"footnotes":""},"class_list":["post-171","page","type-page","status-publish","hentry","clearfix"],"_links":{"self":[{"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/pages\/171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/comments?post=171"}],"version-history":[{"count":8,"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/pages\/171\/revisions"}],"predecessor-version":[{"id":347,"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/pages\/171\/revisions\/347"}],"up":[{"embeddable":true,"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/pages\/90"}],"wp:attachment":[{"href":"https:\/\/spheres.ino.cnr.it\/index.php\/wp-json\/wp\/v2\/media?parent=171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}