KM3NeT - News Archive

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KM3NeT at #icrc2019

 

28-07-2019 The bi-annual International Cosmic Ray Conference (ICRC) is one of the most important conferences  where astroparticle physicists share their latest results. This year’s conference, the 36th edition,  is organised in Madison, Wisconsin, USA, from 24 July – 1 August.

Together, the ANTARES and KM3NeT Collaborations present their results in a highlight talk by Rosa Coniglione and in total 35 talks and posters.

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 


For the experts:

Below a gallery of  contributions  presented  at #icrc2019 on be half of the KM3NeT Collaboration. They comprise technical work, calibration work, data analysis, software developments and predictions of  sensitivities of the detectors and theoretical limits. Click on the images for the proceedings.

Talks:

Posters:

 


KM3NeT is growing

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.

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.

Height versus the time of the recorded light signals seen in both detection units for a down-going muon particle created in the atmosphere.

 

 

 

 

 

 

 

Sea science instrumentation module

In addition to the two units for neutrino research, also a sea science instrumentation module was installed. This unit, built by the technical division of INSU for EMSO-France, 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.

The instrumentation module.
Time series of the pressure variations on the sea floor due to the tidal action.

Notre Dame

With great sadness we have witnessed the recent news on the destruction of the iconic Notre Dame Cathedral in Paris, a UNESCO World Heritage monument.

The KM3NeT Collaboration, with a significant participation from French Universities and Research Institutions, offers its full support and sympathy to France and the people of Paris, hoping for a quick restoration of the Notre Dame.

(Photo by H.T. van Deurzen, Notre Dame, 2019/03/05 23:47)


ORCA is operational

8 March 2019 – Last month, the KM3NeT team of CPPM, Marseille together with the ship crews successfully installed an ORCA detection unit. It was the first unit connected to the refurbished main electro-optical cable to shore. After a few weeks of technology tests, the unit is given free for physics runs. ORCA is operational!

Unfortunately, after the deployment of one unit, the winch of the heavy lift line failed and three other units could not be deployed. They will be deployed during the next sea campaign.

In the mean time, KM3NeT researchers have taken up the duty of 24/7 shifts overlooking proper functioning of the detection units at both the ORCA and ARCA site. It is a pleasure to watch good quality data streaming to shore.

Pictures below: Four detection units in their deployment mode on deck of RV Castor (left), the package with the detection unit hanging on the heavy weight lift line just above the water surface (middle) and a plot of the signals that a down-going muon particle leaves in the detection unit: height vs the time of the recorded light signals (right).


ARCA is alive again

29 January 2019 – KM3NeT had a good start of 2019. Data taking of the first detection unit of ARCA could be resumed, after the operation of the unit had to be stopped in 2017, because of a fault in the seafloor cable network. Thanks to a fix of the network early January, the ARCA unit is operational again and data taking runs smoothly since. The first events could be reconstructed immediately after switch-on. This first ARCA detection unit was installed on 3 December 2015 and has been operational until data-taking had to be halted in 2017. It remained unattended in the deep sea for more than a year and celebrated last December its 3rd anniversary at its location at a depth of 3400 m without any ceremony. KM3NeT is happy the unit is back into operation again.

Below, screenshots of the computers in the shore station at Porto Palo di Capo Passero during installation of the unit in 2015. Above: the first reconstructed event after resuming data taking in 2019.

  

 


Workshop on simulation and data analysis

23 January 2019 – An internal KM3NeT workshop on ‘Simulation and Data Analysis’ was organised at INFN – Istitutio Nazionale di Fisica Nucleare in Genova, Italy. In the last two years the ARCA and ORCA sites were equipped with the first detection units which allowed for obtaining the first calibration data. The data comprises many measurements of muons created in the atmosphere. These measurements, although background to the neutrino signal, are extremely useful for the understanding of the detector performance and improving detector calibration and simulations of the detector response. The aim of the workshop was to review the currently existing simulation software tools and tuning them to reach agreement with the collected data on a new precision level.

Simulation of background events comprises very computationally intensive tasks, which must be run on the GRID and cloud infrastructures. For this, automatic workflows for the software deployment and running on different computer infrastructures were discussed and tests have been started. The simulation workflows also should keep provenance of the data to allow for repetition  and tracing of each simulated event. Automisation of the quality control of the data and simulation is yet another key task addressed at the workshop.


Launch of ESCAPE cluster for Open Science

20 November 2018 – As an ESFRI research infrastructure for neutrino astronomy and particle physics, KM3NeT actively participates in the new ESCAPE science cluster that will address Open Science data challenges shared by the participating European large research infrastructures for astronomy and particle physics. Early 2019, ESCAPE will be launched officially. Read the press release and the project summary.

Read more


KM3NeT meets in Caserta

This week, 22-26 October 2018, researchers and engineers of KM3NeT are in Caserta, Italy for their annual Fall-meeting. The meeting is organised by the colleagues of the KM3NeT team of INFN/Naples. A week full of presentations and discussions in parallel and plenary sessions. Today we are looking forward for an excellent Italian Collaboration dinner.

Thank you, Pasquale Migliozzi and your organising team for hosting us!


New KM3NeT management team elected

23 October 2018 – KM3NeT proudly presents its new management team!

In a few months from now, at 1 February 2019, the new management team will take over from the current one for a term of two years. Mauro Taiuti chairs the team as the Spokesperson (Director) of the KM3NeT Collaboration. He shares the tasks with Aart Heijboer, who is the Deputy Spokesperson. Miles Lindsey Clark is the Technical Project Manager and Paschal Coyle the Physics and Software Manager. Together they will lead the KM3NeT Collaboration of researchers and engineers in their endeavour of building the ARCA and ORCA neutrino detectors, taking data and searching with deep learning techniques and complex algorithms for signatures of neutrinos.

The KM3NeT Collaboration has great confidence in the team and congratulates all four members with their election!


KM3NeT wishes all XPRIZE finalists good luck!

During November and December 2018, KM3NeT will follow with great interest the sea operations of the finalists of the Shell Ocean Discovery XPRIZE.

The Shell Ocean Discovery XPRIZE is a global competition for innovation in deep sea technology. The challenge for the nine teams in the final competition is to explore and map within 24 hours and with a resolution of at least five metres a large area of the seafloor of the Mediterranean Sea, off-shore the city of Kalamata on the Peleponnese  peninsula of Greece.

The selected area is about 500 km2 with depths up to 4000 m. The teams must explore at least 250 km2 of the area with their self-developed autonomous technology. The autonomous devices will be launched from a control centre in Kalamata, where they must be recovered again at the end of their explorative mission.

Fortunately for KM3NeT the selected area includes the future third installation site of KM3NeT. The high-resolution bathymetric map resulting from the measurements of the finalists will be made available to NCSR-Demokritos, one of the founding partners of KM3NeT and the managing institute of the KM3NeT-Gr installation site. The high-resolution map is a fantastic contribution to the implementation of the KM3NeT-Gr site.

The KM3NeT Collaboration wishes all finalists good luck in their challenging endeavour!