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class="search-field" placeholder="" value="" name="s" title="Cerca:"/> </label>  <button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-search" aria-hidden="true"></span></button> </form></li> </ul> </div>  </div> </nav> </header>  <div id="main" class="animated fadeIn">  <div class="container"> <div class="row"> <div class="col-xs-12 col-sm-9 col-md-9 col-lg-9 m10h"> <article id="post-4214" class="post-4214 post type-post status-publish format-standard hentry category-archive category-news"> <h1 class="entry-title">KM3NeT is growing</h1> <div class="entry-content"> <p><a href="https://web.archive.org/web/20190715173747/https://www.km3net.org/wp-content/uploads/2019/05/deploying-a-furled-detection-unit.jpg"><img class="alignleft wp-image-4215 size-thumbnail" src="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/deploying-a-furled-detection-unit-180x180.jpg" alt="" width="180" height="180"/></a>28 May 2019 – The KM3NeT/ORCA detector is now running with two detection units. The two units were installed during a recent deployment campaign. The KM3NeT researchers are eagerly analysing the recorded signals, while preparing the deployment of a further set of detection units.</p> <p>For deployment, the units are packed in a compact configuration and lowered the 2.5 km from the deployment vessel to the sea floor. Using an acoustic system based on a set of acoustic transponders anchored on the sea floor, they are positioned to within 1 m of their nominal position. After connection to the sea floor network, a ROV triggers the detection unit to unfurl to its vertical position. For ORCA, the units are horizontally spaced by 20-23 m from each other. Vertically, the optical light sensors are attached to the unit with a spacing of about 9 m.</p> <figure id="attachment_4216" aria-describedby="caption-attachment-4216" style="width: 300px" class="wp-caption alignnone"><a href="https://web.archive.org/web/20190715173747/https://www.km3net.org/wp-content/uploads/2019/05/height-versus-time-of-light-signals.png"><img class="wp-image-4216 size-medium" src="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/height-versus-time-of-light-signals-300x159.png" alt="" width="300" height="159" srcset="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/height-versus-time-of-light-signals-300x159.png 300w, https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/height-versus-time-of-light-signals-768x408.png 768w, https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/height-versus-time-of-light-signals-1024x544.png 1024w" sizes="(max-width: 300px) 100vw, 300px"/></a><figcaption id="caption-attachment-4216" class="wp-caption-text">Height versus the time of the recorded light signals seen in both detection units for a down-going muon particle created in the atmosphere.</figcaption></figure> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <h4><strong>Sea science instrumentation module</strong></h4> <p>In addition to the two units for neutrino research, also a sea science instrumentation module was installed. This unit, built by the <a href="https://web.archive.org/web/20190715173747/http://www.dt.insu.cnrs.fr/">technical division of INSU</a> for <a href="https://web.archive.org/web/20190715173747/http://www.emso-fr.org/EMSO-France">EMSO-France</a>, hosts sensors that provide real-time monitoring of a variety of environmental parameters including temperature, pressure, conductivity, oxygen, turbidity and sea current. The module also incorporates an acoustic modem that, in the near future, will communicate acoustically with an autonomous ‘Albatross’ line; an instrumentation line dedicated to the oceanographic studies of the full 2.5 km water column.</p> <figure id="attachment_4217" aria-describedby="caption-attachment-4217" style="width: 300px" class="wp-caption alignnone"><a href="https://web.archive.org/web/20190715173747/https://www.km3net.org/wp-content/uploads/2019/05/sea-science-instrumentation-module.jpg"><img class="wp-image-4217 size-medium" src="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/sea-science-instrumentation-module-300x225.jpg" alt="" width="300" height="225" srcset="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/sea-science-instrumentation-module-300x225.jpg 300w, https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/sea-science-instrumentation-module-768x576.jpg 768w, https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/sea-science-instrumentation-module.jpg 1024w" sizes="(max-width: 300px) 100vw, 300px"/></a><figcaption id="caption-attachment-4217" class="wp-caption-text">The instrumentation module.</figcaption></figure> <figure id="attachment_4218" aria-describedby="caption-attachment-4218" style="width: 281px" class="wp-caption alignnone"><a href="https://web.archive.org/web/20190715173747/https://www.km3net.org/wp-content/uploads/2019/05/pressure-variations-at-the-sea-floor-due-to-tidal-action.png"><img class="wp-image-4218 size-medium" src="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/pressure-variations-at-the-sea-floor-due-to-tidal-action-281x300.png" alt="" width="281" height="300" srcset="https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/pressure-variations-at-the-sea-floor-due-to-tidal-action-281x300.png 281w, https://web.archive.org/web/20190715173747im_/https://www.km3net.org/wp-content/uploads/2019/05/pressure-variations-at-the-sea-floor-due-to-tidal-action.png 747w" sizes="(max-width: 281px) 100vw, 281px"/></a><figcaption id="caption-attachment-4218" class="wp-caption-text">Time series of the pressure variations on the sea floor due to the tidal action.</figcaption></figure> </div> <footer class="entry-footer"> </footer> </article> <script type="text/javascript"> jQuery(document).ready(function ($) { //Add buttons lightbox and download $(".size-thumbnail").each(function(){ console.log($(this)); var full_image = $(this).attr('src').replace('-180x180', ''); var caption = full_image.replace(/^.*\/|\.[^.]*$/g, ''); var html_block = ' <div class="links animated fadeInDown">'; html_block += ' <a href="'+full_image+'" title="KM3NeT - 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