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Marco Kraan @mjkraan.bsky.social · 02/10/2026

Morgwn, zaterdag 3 oktober vanaf 12:00 t/m 17:00 uur is Open Dag op @nikhef.bsky.social Kom je ook?

Marco Kraan @mjkraan.bsky.social · 01/09/2026

The @cern.bsky.social ATLAS ITK ENDCAP CF-structure is, after 2 years, back in the @nikhef.bsky.social (National Institute for Subatomic Physics) cleanroom: youtu.be/cgUd68cS_Dc?...

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ATLAS ITK ENDCAP CF-structure back in cleanroom

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 21/08/2026

Why are they lying on the cleanroom floor for the @cern.bsky.social ATLAS ENDCAP at @nikhef.bsky.social (National Institute for Subatomic Physics)? You will find out next week!

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Marco Kraan @mjkraan.bsky.social · 13/08/2026

ATLAS (@cern.bsky.social) photoshoot on a Petal prototype. Test to use a photo camera for initial petal inspections when a Petal arrives at @nikhef.bsky.social (National Institute for Subatomic Physics).

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Marco Kraan @mjkraan.bsky.social · 12/08/2026

ECLIPS FOILS (not certified) are free tot take at the @nikhef.bsky.social (National Institute for Subatomic Physics) coffee desk Formerly used for the production of Foil Wire Chambers at @cern.bsky.social

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Marco Kraan @mjkraan.bsky.social · 06/08/2026

The removal of the @cern.bsky.social ATLAS ITK ENDCAP Mockup from the @nikhef.bsky.social cleanroom

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Marco Kraan @mjkraan.bsky.social · 05/08/2026

The @cern.bsky.social ATLAS ITK Mockup, with 15 dummy petals and cooling tubes, is placed in the closed Thermal Enclosure at the @nikhef.bsky.social clean room for a Moisture Test. Cooling lines are connected to the CO2 cooler (-30°C) and dry air (dew temp -40°C) is blown into the volume.

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Marco Kraan @mjkraan.bsky.social · 16/07/2026

Spectacular unveiling of VELO1 Exhibition with Mylar film at @nikhef.bsky.social ! The problem was that the exhibition is quite high and angular, and pulling it over the exhibition posed a high risk of damaging the glass display case. Mylar tears very easily and was the solution for the unveiling:

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Marco Kraan @mjkraan.bsky.social · 15/07/2026

@cern.bsky.social Director-General Mark Thomson and @nikhef.bsky.social @lhcb.bsky.social Program Leader Mara Senghi Soares jointly unveiled the VELO1 Exhibition together with Nikhef director Jorgen D'Hondt on Thursday, July 9 2026. youtu.be/R3CUyh5X33Y

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VELO1 Exhibition at Nikhef - Unveiling (July 9, 2026)

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 14/07/2026

VELO1 Exhibition at @nikhef.bsky.social - The Making Of After 12 years of faithful service at @lhcb.bsky.social the two VELO1 detectors are exhibit in a vertical position to obtain the best view. This exhibition will illustrate the strong link between science & technology. youtu.be/0-yUvrCoRWY

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VELO1 Exhibition at Nikhef - The Making Of

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 10/07/2026

This masterpiece, consisting of two VELO detectors with 46 Si modules in a row with an overlap of 4 mm and a mutual offset of 15 mm, can now be admired at @nikhef.bsky.social! It collected data from 2010 till 2018 in @lhcb.bsky.social @cern.bsky.social

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Marco Kraan @mjkraan.bsky.social · 08/07/2026

VELO Exhibition will be unveiled July 9 at @nikhef.bsky.social Until now, this assembly was never visible to humans, it was only 'visible' by the passing particles in @lhcb.bsky.social from 2010 till 2018. These two silicon detectors have been measured for 10 years in the LHC beam @cern.bsky.social

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Marco Kraan @mjkraan.bsky.social · 06/07/2026

VELO1 Exhibition: CO2 cooling & flat cables The new @lhcb.bsky.social VELO1 Exhibition will be unveiled on July 9 at @nikhef.bsky.social. These two silicon detectors have been measured for 10 years in the LHC beam of @cern.bsky.social youtube.com/shorts/LqYQ_...

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VELO1 Exhibition: CO2 cooling & flat cables

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 02/07/2026

VELO1 Exhibition: first detector successfully installed! The new @lhcb.bsky.social VELO1 Exhibition will be unveiled on July 9 at @nikhef.bsky.social (National Institute for Subatomic Physics). These two silicon detectors have been measured for 10 years in the LHC beam of @cern.bsky.social

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Marco Kraan @mjkraan.bsky.social · 25/06/2026

4 wheels, feet, support bars & base display panel is assembled on the base frame of the VELO1 Exhibition. The new @lhcb.bsky.social VELO1 Exhibition will be unveiled on July 9 at @nikhef.bsky.social. These two silicon detectors have been measured for 10 years in LHC. youtube.com/shorts/LGFfj...

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VELO1 Exhibition: assembly wheels and base display panel on base frame

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 19/06/2026

VELO1 Exhibition: 4 support bars/rings & steel base frame are ready @nikhef.bsky.social. To be continued... The new @lhcb.bsky.social VELO1 Exhibition will be unveiled on July 9 at Nikhef. These two silicon detectors have been measured for 10 years in the LHC beam of @cern.bsky.social

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Marco Kraan @mjkraan.bsky.social · 09/06/2026

The 4 aluminum elegant bars (which hold one @lhcb.bsky.social @cern.bsky.social VELO1 detector above the other) are ready at @nikhef.bsky.social (National Institute for Subatomic Physics)! The two VELOs are eager to exhibit.

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Marco Kraan @mjkraan.bsky.social · 02/06/2026

Three-quarters of the milling of this elegant aluminium bar, which holds one VELO1 above the other, is complete in our @nikhef.bsky.social workshop. A new @lhcb.bsky.social VELO1 Exhibition will be unveiled on July 9 at Nikhef.

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Marco Kraan @mjkraan.bsky.social · 29/05/2026

A new @lhcb.bsky.social VELO exhibition will be unveiled on July 9 at @nikhef.bsky.social (National Institute for Subatomic Physics). Production has already started to make this happen on short notice in collaboration with Rozemond Tentoonstellingen & LetterZ

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Marco Kraan @mjkraan.bsky.social · 20/05/2026

A new lab takes shape at @nikhef.bsky.social for research into ultra-cold mirrors for gravitational-wave detectors: ICELab The ICELab hosts a new research facility designed to study and characterize mirror coatings for the next generation of gravitational-wave detectors as Einstein Telescope (ET)

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Marco Kraan @mjkraan.bsky.social · 16/04/2026

Installing and closing the ETpathfinder Injection Tower. This tower consists of four 3.5-meter-high Inverted Pendulus (IPs), three Geometric Anti-Spring (GAS) filters and an 1.3x1.3m optical table. All three GAS filters were already tuned at @nikhef.bsky.social youtu.be/s4UdIFONVwM

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Installing and closing ETpathfinder Injection Tower

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 26/03/2026

See the first machining step of the housing for the Quadrant Photo-Diode (QPD) for ETPathfinder. The housing is being manufactured on a latest-generation 5-axis DMG CMX 70U milling machine at @nikhef.bsky.social (National Institute for Subatomic Physics). youtube.com/shorts/Up4Z6...

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QPD ETpathfinder

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 19/03/2026

Artwork of Jop Vissers Vorstenbosch at @nikhef.bsky.social (National Institute for Subatomic Physics)

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Marco Kraan @mjkraan.bsky.social · 25/02/2026

See here the production of the first housings of the Quadrant Photo-Receivers (QPRs) at @nikhef.bsky.social for the future Laser Interferometer Space Antenna (LISA). LISA is the first European space mission to measure gravitational waves in the universe. youtu.be/akYodNUc2KU

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Production LISA QPR Housing @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 29/01/2026

Today @nikhef.bsky.social (National Institute for Subatomic Physics) again covered with a thin layer of snow ❄️

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Marco Kraan @mjkraan.bsky.social · 23/01/2026

The cloud chamber is an important part of the @nikhef.bsky.social expostrip, the instrument that make traces of small particles visible, but is now under maintenance 🛠️ It will be back soon 😊

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Marco Kraan @mjkraan.bsky.social · 23/01/2026

Yesterday, January 22, after 2 months of production, the special custom-made @nikhef.bsky.social conference table for our director (Prof. Jorgen D'Hondt) is installed by the company HOUTWERK and with the help of our facilities department. youtube.com/shorts/k-QGX...

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Installation of the special Nikhef conference table (3/3)

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 15/01/2026

Yesterday, the well-attended @nikhef.bsky.social New Year's reception (postponed due to ❄️ conditions last week) and the announcement that master's student Meer Patel has won the 2025 Olga Igonkina travel grant for her work on the dark matter detector : www.nikhef.nl/news/oiga-ig...

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Marco Kraan @mjkraan.bsky.social · 14/01/2026

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

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Marco Kraan @mjkraan.bsky.social · 23/12/2025

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 🥂✨!

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Marco Kraan @mjkraan.bsky.social · 22/12/2025

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

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KM3NeT ORCA33 scale model 1:60

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 16/12/2025

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...

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Crucial check VELO1 for exhibition at Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 10/12/2025

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...

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LN2 vessel ETpathfinder

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 09/12/2025

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

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Marco Kraan @mjkraan.bsky.social · 05/12/2025

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

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Closing BS vacuum vessel @ ETpathfinder

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 27/11/2025

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...

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Poster with a view to CERN

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 21/11/2025

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...

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Major replacement UPS & batteries at Nikhef Data Center

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 18/11/2025

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

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Exhibition LHCb VELO at Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 13/11/2025

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

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Hoisting first suspended tower @ ETpathfinder

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 05/11/2025

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

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Onthulling Kunstwerk door Jop Visser Vorstenbosch

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 05/11/2025

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:

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Marco Kraan @mjkraan.bsky.social · 03/11/2025

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

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DAY 8 - Installation Artwork Jop Vissers Vorstenbosch @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 30/10/2025

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

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DAY 7 - Installation Artwork Jop Vissers Vorstenbosch @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 28/10/2025

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

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DAY 6 - Installation Artwork Jop Vissers Vorstenbosch @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 27/10/2025

‪ 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

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DAY 5 - Installation Artwork Jop Vissers Vorstenbosch @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 24/10/2025

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

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DAY 4 - Installation Artwork Jop Vissers Vorstenbosch @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 23/10/2025

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

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DAY 3 - Installation Artwork Jop Vissers Vorstenbosch @ Nikhef

YouTube video by Marco Kraan

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Marco Kraan @mjkraan.bsky.social · 23/10/2025

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

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