{"id":579,"date":"2023-12-07T17:46:34","date_gmt":"2023-12-07T17:46:34","guid":{"rendered":"https:\/\/web.infn.it\/TechTransfer\/?post_type=portfolio_page&p=579"},"modified":"2024-07-11T13:05:32","modified_gmt":"2024-07-11T13:05:32","slug":"aptnc","status":"publish","type":"portfolio_page","link":"https:\/\/web.infn.it\/TechTransfer\/portfolio_page\/aptnc\/","title":{"rendered":"APTNC"},"content":{"rendered":"

[vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=””][vc_column][vc_raw_html]JTVCd3BzZW9fYnJlYWRjcnVtYiU1RA==[\/vc_raw_html][vc_empty_space][vc_column_text]<\/p>\n

APTNC
\n<\/span><\/h1>\n

[\/vc_column_text][vc_empty_space][vc_column_text]<\/p>\n

Active Pulse Tube Noise Cancellation<\/h2>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=””][vc_column width=”2\/3″][vc_empty_space][vc_column_text]Sistema automatico per ridurre le vibrazioni generate dai sistemi di raffreddamento per temperature vicine allo zero assoluto senza elio liquido. La soppressione delle vibrazioni permette di ampliare il campo di utilizzo di questi sistemi anche per applicazioni particolarmente sensibili al rumore, come la microscopia a effetto tunnel o gli apparati per la risonanza magnetica (NMR, MRI).<\/p>\n

 <\/p>\n

I refrigeratori di tipo pulse tube (PT) funzionano attraverso le espansioni di un gas, tipicamente elio, pulsate a una frequenza tipica di 1.4 Hz e comandate attraverso l\u2019apertura di una valvola rotante; il vantaggio di questi sistemi \u00e8 che non necessitano di gas liquefatti ma, di contro, il ciclo di espansione e compressione del gas genera rumore e vibrazioni che possono impedire l\u2019utilizzo di questi sistemi in certe applicazioni.[\/vc_column_text][vc_empty_space][vc_single_image image=”2121″ img_size=”full” qode_css_animation=””][vc_empty_space][vc_column_text]L\u2019idea consiste nel controllare, in un sistema formato da due o pi\u00f9 PT, le fasi di apertura e chiusura delle valvole in modo che le vibrazioni si cancellino a vicenda, minimizzando il rumore.<\/p>\n

 <\/p>\n

Il sistema acquisisce, attraverso apposti microfoni, lo spettro di rumore dei PT che poi viene elaborato da un apposito algoritmo di minimizzazione e utilizzato per comandare l\u2019apertura delle valvole, creando un\u2019interferenza distruttiva che cancella attivamente il rumore.<\/p>\n

 <\/p>\n

Questo progetto ha generato una collaborazione con Leiden Cryogenics<\/a><\/span>\u00a0che propone in licenza la tecnologia di soppressione del rumore.[\/vc_column_text][vc_empty_space][\/vc_column][vc_column width=”1\/4″ css=”.vc_custom_1702565918832{margin-bottom: 50px !important;background-color: #042d4c !important;}” el_class=”column_details_portfolio”][vc_column_text]<\/p>\n

INFO<\/span><\/h4>\n

[\/vc_column_text][vc_empty_space][vc_column_text css=”.vc_custom_1702566426569{background-color: #042d4c !important;}”]<\/p>\n

RESPONSABILE PROGETTO<\/strong><\/h5>\n

Antonio D’Addabbo<\/p>\n

[\/vc_column_text][vc_empty_space height=”21px”][vc_column_text css=”.vc_custom_1702566743916{background-color: #042d4c !important;}”]<\/p>\n

ANNO<\/strong><\/h5>\n

2018<\/span><\/strong>[\/vc_column_text][vc_empty_space height=”21px”][vc_column_text css=”.vc_custom_1720703088252{background-color: #042d4c !important;}”]<\/p>\n

STRUTTURE COINVOLTE<\/strong><\/h5>\n

Laboratori Nazionali del Gran Sasso <\/span><\/strong><\/a><\/span>[\/vc_column_text][vc_empty_space height=”21px”][vc_column_text css=”.vc_custom_1714312205113{background-color: #042d4c !important;}”]<\/p>\n

SETTORI TECNOLOGICI<\/strong><\/h5>\n

Vuoto e criogenia <\/span><\/strong>[\/vc_column_text][vc_empty_space height=”21px”][vc_column_text css=”.vc_custom_1712607706138{background-color: #042d4c !important;}”]<\/p>\n

TECNOLOGIE COLLEGATE<\/strong><\/h5>\n

K_22.020; P_20.109<\/span><\/strong>[\/vc_column_text][vc_empty_space height=”21px”][vc_row_inner row_type=”row” type=”full_width” text_align=”left” css_animation=””][vc_column_inner el_class=”riga_spazio_progetti”][\/vc_column_inner][\/vc_row_inner][vc_empty_space height=”21px”][vc_column_text css=”.vc_custom_1720703101852{background-color: #042d4c !important;}”]<\/p>\n

CONTATTI<\/strong><\/h5>\n

Per maggiori informazioni sul progetto, <\/span>SCRIVICI<\/span><\/strong><\/span><\/a>[\/vc_column_text][vc_empty_space height=”21px”][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column][vc_empty_space height=”51px”][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=””][vc_column][vc_raw_html]JTVCd3BzZW9fYnJlYWRjcnVtYiU1RA==[\/vc_raw_html][vc_empty_space][vc_column_text] APTNC [\/vc_column_text][vc_empty_space][vc_column_text] Active Pulse Tube Noise Cancellation [\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=””][vc_column width=”2\/3″][vc_empty_space][vc_column_text]Sistema automatico per ridurre le vibrazioni generate dai sistemi di raffreddamento per temperature vicine allo zero assoluto senza elio liquido….<\/p>\n","protected":false},"author":1,"featured_media":1900,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","portfolio_category":[75,18,80],"portfolio_tag":[],"class_list":["post-579","portfolio_page","type-portfolio_page","status-publish","has-post-thumbnail","hentry","portfolio_category-fisica","portfolio_category-r4i","portfolio_category-vuoto-e-criogenia"],"acf":[],"yoast_head":"\nAPTNC - TechTransfer INFN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/web.infn.it\/TechTransfer\/portfolio_page\/aptnc\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"APTNC - TechTransfer INFN\" \/>\n<meta property=\"og:description\" content=\"[vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=””][vc_column][vc_raw_html]JTVCd3BzZW9fYnJlYWRjcnVtYiU1RA==[\/vc_raw_html][vc_empty_space][vc_column_text] APTNC [\/vc_column_text][vc_empty_space][vc_column_text] Active Pulse Tube Noise Cancellation [\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=””][vc_column width=”2\/3″][vc_empty_space][vc_column_text]Sistema automatico per ridurre le vibrazioni generate dai sistemi di raffreddamento per temperature vicine allo zero assoluto senza elio liquido....\" \/>\n<meta property=\"og:url\" content=\"https:\/\/web.infn.it\/TechTransfer\/portfolio_page\/aptnc\/\" \/>\n<meta property=\"og:site_name\" content=\"TechTransfer INFN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/IstitutoFisicaNucleare\/\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-11T13:05:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/web.infn.it\/TechTransfer\/wp-content\/uploads\/2023\/12\/APTNC_400px.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"400\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/web.infn.it\\\/TechTransfer\\\/portfolio_page\\\/aptnc\\\/\",\"url\":\"https:\\\/\\\/web.infn.it\\\/TechTransfer\\\/portfolio_page\\\/aptnc\\\/\",\"name\":\"APTNC - 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