A special @nikhef.bsky.social conference table (3x1.5m with an inlaid Nikhef logo) for our new director Jorgen D'Hondt is being produced at Houtwerk B.V. 👉 To be continued in early 2026 🥂✨!

Last week a @km3net.bsky.social neutrino ORCA33 detector on scale model 1:60 was presented in the entree hall of @nikhef.bsky.social. It was built as a Friday-afternoon-project by staff and students. ORCA33 lies in the Mediterranean sea at a depth of 2450 meters. youtu.be/Tn3ffk63VKc

Two months ago the two first VELO detectors were transported from @cern.bsky.social to @nikhef.bsky.social. They measured for 12 years in the LHCb experiment and were removed from the experiment 6 years ago in 2019. Question is whether they are suitable for exhibition? youtube.com/shorts/uLEXo...

Impressive machining of the second (of 5) top part of the Liquid Nitrogen vessel for #ETpathfinder at @nikhef.bsky.social Volume of this vessel will be 45L and will be filled with 25L liquid Nitrogen (N2) to cool the cryogenic shields in the four mirrors towers youtube.com/shorts/2AdCE...

@nikhef.bsky.social (National Institute for Subatomic Physics) is almost ready for her Christmas dinner (end of year party) tomorrow (Dec 10)

One month ago the Beam Splitter (BS) tower was installed in the bottom part of the vacuum vessel at #ETpathfinder. Now that all filters have been tuned, the vacuum vessel can be closed. @maastrichtu.bsky.social @nikhef.bsky.social @einsteintelescope.bsky.social youtu.be/6-TxZI1W8tA

@nikhef.bsky.social is ready for Christmass

This week a huge poster is installed in a busy @nikhef.bsky.social corridor where the R&D department is housed with a view to the Nikhef R&D setup at @cern.bsky.social H8 beamline: youtube.com/shorts/nc8my...

A major replacement of all Uninterruptible Power Supplies (UPS) and batteries in the @nikhef.bsky.social (National Institute for Subatomic Physics) Data Center is underway. youtube.com/shorts/ZB0Pv...

After 12 years of faithful service in the LHC vacuum of @cern.bsky.social at @lhcb.bsky.social the two VELO detectors have returned 'home' in november 2025 at @nikhef.bsky.social khef and we want to exhibit them! youtu.be/bzJk1xwMF5A

Hoisting first (of 6) suspended tower (Beam Splitter Tower) at ETpathfinder @nikhef.bsky.social. youtu.be/1u9dI1lVM_8

Zie (en luister 🔊) hier de onthulling door Jop Vissers Vorstenbosch van z'n spectaculair dynamisch lichtkunstwerk op 16 oktober 2025 in de entreehal van @nikhef.bsky.social (National Institute for Subatomic Physics): youtu.be/xCzHV0bpekc Titel: Een Onwaarschijnlijk Super Event

A week ago, on Thursday, October 30, 2025 @nikhef.bsky.social (National Institute for Subatomic Physics) celebrated its 50th anniversary with 250 participants, six external speakers, a panel discussion, an inspiring Nikhef video about Science & Society and the six former directors at the Rode Hoed:

See here the last installation day (8) of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled two and a half weeks ago in the lobby of the newly renovated @nikhef.bsky.social Title: An Improbable Super Event youtu.be/DF-3Li0kpVs

See here the second to last day (7) of the installation of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled on October 16 in the lobby of the newly renovated @nikhef.bsky.social Title: An Improbable Super Event youtu.be/YXVkqFCC-rg

See the sixh installation day (of eight) of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled on October 16 in the lobby of the newly renovated @nikhef.bsky.social (National Institute for Subatomic Physics) Title: An Improbable Super Event youtu.be/LVJxbnvrZu4

‪ See the fifth installation day (of eight) of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled last week (October 16) in the lobby of the newly renovated @nikhef.bsky.social (National Institute for Subatomic Physics) Title: An Improbable Super Event youtu.be/iSO6RaL5Nmk

See the fourth installation day (of eight) of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled last week (October 16) in the lobby of the newly renovated @nikhef.bsky.social National Institute for Subatomic Physics) Title: An Improbable Super Event youtu.be/alTRlBFClyE

See here the third installation day (of eight) of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled last week (October 16) in the lobby of the newly renovated @nikhef.bsky.social (National Institute for Subatomic Physics) Title: An Improbable Super Event youtu.be/-YDPfkIKlrU

See how well the new artwork by Jop Vissers Vorstenbosch is visible from outside @nikhef.bsky.social (National Institute for Subatomic Physics)

‪Here is a summary of the second day of the installation of the spectacular Artwork by Jop Vissers Vorstenbosch, which was unveiled last week (October 16) in the lobby of the newly renovated @nikhef.bsky.social Title: An Improbable Super Event youtu.be/gugNEdTZzFU

Artist Jop Vissers Vorstenbosch installed last week a spectacular dynamic light painting in the lobby of the newly renovated @nikhef.bsky.social See here a summary of the first day of installation, which took a total of 8 days. Title: An Improbable Super Event youtu.be/kqLgPRWTNio

Our new @nikhef.bsky.social entrance is enriched last week with a spectacular artwork, 'Improbable super event' by Jop Vissers Vorstenbosch. These are eight transparent paintings of particle tracks from the ALICE experiment at @cern.bsky.social and visualizations of two colliding black holes

The day after the unveiling of Jop Vissers Vorstenbosch's artwork in the entrance hall of @nikhef.bsky.social (National Institute for Subatomic Physics), Jop is still 'present' on video 😊

Today at 4:30 PM, the unveiling of Jop Vissers Vorstenbosch's artwork in the entrance hall of @nikhef.bsky.social (National Institute for Subatomic Physics): An incredibly super event

Preparations at the entree of @nikhef.bsky.social (National Institute for Subatomic Physics) are underway before artist Jop Vissers Vorstenbosch install his new (tuned to Nikhef) Artwork in early October.

Watch the 'aftermovie' of the @nikhef.bsky.social (National Institute for Subatomic Physics) 50th anniversary party 🥳, held 3 months ago on June 17, 2025: Catering & movie organized by Absolute Delicious absolute-delicious.nl

M'n dierbare collega Michiel Jaspers is gisteren, na 49 jaar en 50 weken 😲 op @nikhef.bsky.social (National Institute for Subatomic Physics), met twee confetti knallen met pensioen gegaan: youtu.be/LHbncW9BUo4

Check out this unique optical table, the so-called 'In-vacuum Seismic Isolation Optical Table' at @nikhef.bsky.social The platform is kept quiet by Active Noise Cancellation which can break through the wall of noise in which gravitational wave signals are buried @vuamsterdam.bsky.social

The third floor houses the @nikhef.bsky.social theory group 👨‍🎓 , as can be seen from what is written on the three chalkboards

See the large (6.5 x 2.5m) Project Wall Poster in our @nikhef.bsky.social director's (Jorgen D'Hondt) room. ATLAS (@cern.bsky.social) detector with an 'Observation of VVZ production' event display. Einstein Telescope detector and the Pierre Auger Observatory. @km3net.bsky.social neutrino detector

Status of project @cern.bsky.social ATLAS ITK End-Cap at @nikhef.bsky.social

Watch 50 years of @nikhef.bsky.social history (highlights) in 15 shorts of 1 minute: www.youtube.com/playlist?lis...

On June 17th, 2025 @nikhef.bsky.social celebrated its 50th anniversary 🥳 Since 2016 Nikhef has been working on the @cern.bsky.social ATLAS Upgrade Inner Tracker (ITk) Strip End-cap. Two super rigid CF structures are assembled with a precise gluing jig in the Nikhef clean-room.

This week on June 17th @nikhef.bsky.social celebrated its 50th anniversary 🥳 Since 2015, Nikhef worked on the Upgrade of the @cern.bsky.social ALICE Outer Barrel (OB) Inner Tracking System (ITS). The ITS Module has 14 pixel chips which measures each 30x15mm with a thickness of only about 0.25mm

@nikhef.bsky.social 50 was a very successful party yesterday!

Yesterday on June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳 Since 2015 NIKHEF has been building the @km3net.bsky.social detector. Each Digital Optical Module (DOM) contains 31 PhotoMultiplier Tubes (PMTs). Deployment in the Mediterranean Sea is at a depth of 2.5 - 3.5 km.

Today, June 17th @nikhef.bsky.social celebrates its 50th anniversary 🥳 Since 2015 NIKHEF has been building the @km3net.bsky.social detector. Each Digital Optical Module is 17 inches in diameter and contains 31 PhotoMultiplier Tubes. Deployment is in the Mediterranean Sea at a depth of 2.5-3.5 km.

Tomorrow June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳, great preparations are underway for the party

Tomorrow on June 17th @nikhef.bsky.social celebrates its 50th anniversary 🥳 NIKHEF was since 2010 in charge of the design and production of 5 MultiSAS systems, for Advanced Virgo, an upgrade of the Virgo interferometer with three kilometer long arms located near Pisa in Italy.

On June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳 Nikhef was in charge of the design and production of crucial hardware components for the vacuum, injection, and detection subsystems of Advanced Virgo, an upgrade of the Virgo interferometer located near Pisa (Italy).

On June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳 Since 1999, Nikhef is involved in the VErtex LOcator (VELO) of @lhcb.bsky.social. As a spin-off of the successful VELO CO2 cooling Nikhef built the CO2 cooling system of the Alpha Magnetic Spectrometer for at the ISS.

On June 17th, 2025 @nikhef.bsky.social (National Institute for Subatomic Physics) celebrates its 50th anniversary 🥳 Part 8: Since @cern.bsky.social built the Large Hadron Collider (LHC) NIKHEF is involved in the ALICE, @atlasexperiment.bsky.social and @lhcb.bsky.social experiments.

On June 17th, 2025 @nikhef.bsky.social Institute celebrates its 50th anniversary 🥳  In 2008 @cern.bsky.social converts LEP into the LHC, an accelerator with superconducting magnets. NIKHEF is involved in 3 major experiments: @lhcb.bsky.social, @atlasexperiment.bsky.social and ALICE:

On June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳  In 1999, NIKHEF starts research in Astroparticle physics at the neutrino telescope ANTARES in the Mediterranean Sea.

On June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳  In 1998 when the accelerator MEA-AmPS stopped the sections K&H were integrated. The institute name changed to: National Institute for Subatomic Physics. NIKHEF will built at DESY detectors for the ZEUS & HERMES experiments.

On June 17th, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳 In 1989 NIKHEF started to build a stretcher ring at the end of the linear Medium Energy Accelerator: the Amsterdam Pulse Stretcher and storage ring (AmPS). AmPS was 50m square and also 8.4 m below sea level.

June 17, 2025 @nikhef.bsky.social celebrates its 50th anniversary 🥳 In 1981 @cern.bsky.social decided to build the Large Electron Positron (LEP) accelerator. Nikhef can help build two of the four experiments (L3 & DELPHI), including Muon Chambers and Support structures for detectors.

Everybody at @nikhef.bsky.social Jamboree

Another @nikhef.bsky.social Jamboree day at Nijmegen