{"id":54074,"date":"2025-07-09T12:00:38","date_gmt":"2025-07-09T06:30:38","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=54074"},"modified":"2025-07-09T13:13:50","modified_gmt":"2025-07-09T07:43:50","slug":"magnetometer","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/magnetometer\/","title":{"rendered":"Magnetometer"},"content":{"rendered":"<h2><b>Magnetometer Latest News<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Researchers at the Raman Research Institute (RRI), an autonomous institution of the Department of Science and Technology (DST), have devised a novel Raman-Driven Spin Noise Spectroscopy method for magnetometry in an all-optical quantum magnetometer that could address these challenges.\u00a0\u00a0<\/span><\/p>\n<h2><b>About Magnetometer<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A magnetometer is a passive instrument that <\/span><b>measures changes in the Earth\u2019s magnetic field.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The most <\/span><b>promising methods<\/b><span style=\"font-weight: 400;\"> for magnetic field measurement are based on <\/span><b>detecting polarization rotation <\/b><span style=\"font-weight: 400;\">of a probe light passing through alkali atoms in a very weak magnetic field.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Magnetometers based on this method, referred to as <\/span><b>Optically pumped atomic magnetometers (OPAMs) and Spin Exchange Relaxation Free (SERF) <\/b><span style=\"font-weight: 400;\">magnetometers.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Typically have high sensitivity but demand sophisticated magnetic shielding and have a lower dynamic range.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Magnetometers are useful devices with applications <\/span><b>in areas ranging from fundamental physics<\/b><span style=\"font-weight: 400;\"> to medical imaging and navigation.<\/span><\/li>\n<\/ul>\n<h3><b>What is Raman-Driven Spin Noise Spectroscopy (RDSNS)?<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It uses <\/span><b>laser light to listen to the tiny quantum jitters<\/b><span style=\"font-weight: 400;\"> of Rubidium atoms.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">These jittery movements, called spin noise, are random fluctuations in the spin of atoms\u2014fundamental quantum properties like tiny bar magnets.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When exposed to a magnetic field, the pattern of this spin noise shifts in predictable ways. By shining lasers and analyzing the noise, researchers can accurately measure the magnetic field without touching or disturbing the atoms.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">RDSNS enhances the <\/span><b>dynamic range considerably<\/b><span style=\"font-weight: 400;\"> without significant loss of sensitivity.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This method could transform the way we measure magnetic fields\u2014making the process faster, portable and precise even in noisy, real-world environments.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This method exhibits potential for field-deployable applications of magnetic field measurement with <\/span><b>broadband capability and fast time response<\/b><span style=\"font-weight: 400;\">, extending across various scientific, industrial and exploratory fields.<\/span><\/li>\n<\/ul>\n<p><b>Source: <\/b><a href=\"https:\/\/www.pib.gov.in\/PressReleasePage.aspx?PRID=2143198\" target=\"_blank\" rel=\"nofollow noopener\"><b>PIB<\/b><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A magnetometer is a passive instrument used to measure variations in the Earth\u2019s magnetic field, aiding in geophysical and space research. Read more about Magnetometer Instrument, Uses, Latest News<\/p>\n","protected":false},"author":24,"featured_media":54092,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[1421],"class_list":{"0":"post-54074","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-magnetometer","9":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/54074","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=54074"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/54074\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/54092"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=54074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=54074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=54074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}