Jos Engelen

Faculty Professor-em, Faculty of Science, University of Amsterdam

Address: Nikhef, Science Park 105, 1098 XG Amsterdam
Tel. +31(0)20 592 2142 | engelen at

A brief CV you find here and a list of scientific publications. Most of these publications can be found at and here with a targeted search (with a few entries of persons with the same name). Top citations (for what it is worth..!)   here Here a list of former Ph.D. students and their current whereabouts, send me updates :)
In progress: filling a repository with selected papers, notes etc.

One publication I am particularly fond of: MEASUREMENT OF DEEP INELASTIC COMPTON SCATTERING OF HIGH ENERGY PHOTONS, CERN/EP/85-07, 18 January 1985. Available here. Co-authors Daniel Treille and Jim Virdee became lifelong friends: they remained faithful to science whilst I strayed off into science management and administration... The discovery of the Higgs boson was their share!

Current activities include: member Supervisory Board Waddenacademie
Member RvC Matrix Innovation Center
Former 'Third' member of the Executive Board of NeCEN The Netherlands Centre for Electron Nanoscopy
Associate editor for European Physical Journal EPJ C

Buttons to the various chapters of this site:

Temporary topical special subject:

On ultra-dense hydrogen as a medium for 'spontaneous' appearance of antiprotons and their subsequent annihilation. To be clear: my indignation does not apply to the person(s) who wrote these articles but to those who published them in the peer reviewed scientific literature. They should retract this NONSENSE. They have no mechanism for this, they say...
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November 2023
"Comment on ‘Ultradense protium p(0) and deuterium D(0)and their relation to ordinary Rydberg matter: a review’ (2019 Physica Scripta 94 075005 )" has been published in Physics Scripta: here. Citation: Klavs Hansen and Jos Engelen 2023 Phys. Scr. 98 127001 DOI 10.1088/1402-4896/ad05c7

October 2023
As a follow up to a tweet on X, here is a note on Einstein's original (1905) derivation of the Lorentz transformations, which was confusing, or inconsistent, or sloppy, or wrong... Click here.

July 2023
A published comment by Klavs Hansen and Jos Engelen on a claim of cheap muon production for building a fusion reactor based on muon catalyzed fusion: here. Cite as: Hansen, K., Engelen, J. Are claims of cheap muon production correct?. Energ Sustain Soc 13, 24 (2023).

May 2023
Speech at the occasion of the award ceremony of the 2022 Kuyver Prize. See also dedicated webpage.

Wrote an article 'How quarks made their entrance into our worldview'. Original version in Dutch, submitted to Ned. Tijdschrift v. Natuurkunde. The automatically generated (using freely available AI software) translation in English: here. The NTvN-article has been accepted for publication. Once it has been published I will make a reprint available.

October 14 2022

Seminar in honor of Jim Virdee : Programme .
My talk (with slides appended) here

A while ago
I co-authored (with Paul 't Hart) a chapter (chapter 9) in the book Guardians of Public Value. The book is Open Access, chapter 9 is entitled: CERN: Guardian of the Human Aspiration to Understand the Universe

Minisymposium and valedictory lecture ('afscheidscollege') on March 10, 2017, Aula UvA. The lecture: text. The slides (without animation, however) are here
The write-up of the lecture can be found here

Orange = Dutch:
Afscheid Algemeen Bestuur NWO, 7 december 2016, Glazen Zaal, Den Haag, korte speech

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