Muon tomography is an application of particle detectors where we exploit the peculiar properties of muons to create three-dimensional images of the interior of unknown, inaccessible volumes. You might also want to be reminded that muons are unstable elementary particles; they are higher-mass versions of electrons which can be found in cosmic ray showers or produced in particle collisions.

During my long trip to South America, which just ended (leaving me fighting with a record pile of unanswered emails, an even higher pile of laundry, and a headache for jetlag-induced sleep deprivation), I had the real pleasure to make acquaintance with a Colonel of the British army (Guy Wood) during a cruise of the Galapagos archipelago. One of the recurring topics of our evening chats was of course international travel - the cause of our encounter - and in one occasion he pointed out that Air France is the airline with the worst record in terms of plane accidents.

Yesterday I profited of the kindness of Cesar Ocampo, the site manager of the Parque Astronomico near San Pedro de Atacama, in northern Chile, to visit a couple of places that the SWGO collaboration is considering as the site of a large array of particle detectors meant to study ultra-high-energy gamma rays from the sky. 

SWGO and cosmic ray showers

Yesterday I visited a high school in Venice to deliver a lecture on particle physics, and to invite the participating students to take part in an art and science contest. This is part of the INFN "Art and Science across Italy" project, which has reached its fourth edition, organizes art exhibits with the students' creations in several cities across Italy. The best works are then selected for a final exhibit in Naples, and the 24 winners are offered a week-long visit to the CERN laboratories in Geneva, Switzerland.

I just finished reading a very nice piece on the Guardian, written by my friend and ex colleague Eleni Petrakou, who collaborated with me in the CMS experiment at CERN and is now a scientific writer. The topic is the disruptive effect that the war in Ukraine has caused to scientific collaboration. I urge you to read it if the matter is of any interest to you.