Årets generalforsamling i Dansk Fysisk Selskab bliver afholdt fredag d. 4. oktober 2024 kl. 13:30-16:30 i Margrethe Bohr Multisalen på Niels Bohr Bygningen, Jagtvej 155 A, 2200 København N.

Alle er velkomne!

Tilmelding er nu åben via nedenstående link. Din tilmelding hjælper os også med at planlægge fredagsbaren efter generalforsamlingen. https://danskfysiskselskab.nemtilmeld.dk/4/.

Det er også muligt at deltage virtuelt, så medlemmer fra hele landet kan være med.

Inden generalforsamlingen byder vi på to spændende foredrag, og efterfølgende afholdes fredagsbar med favorable priser for medlemmer og mulighed for at melde sig ind i foreningen, hvis man ikke allerede er medlem.

Vi er glade for at kunne offentliggøre de to foredragsholdere! Foredragene bliver afholdt på engelsk.

⭐Christine Hvidberg, Professor, Is-, klima- og geofysik, Niels Bohr Insitutet, Københavns Universitet

Title: Ice sheet tipping points and sea level rise

Abstract: With ice volumes of more than 65 meters of sea level equivalent, Earth’s large ice sheets in Greenland and Antarctica are by far the largest potential sources of future sea-level rise. These giant ice reservoirs are losing mass in today’s warming climate and their long-term stability determines the fate of coastal communities around the world. Here, I discuss how we combine ice cores, observations, and models to understand how ice sheets evolve, and review ice-sheet instability processes and their impacts on sea-level rise.

⭐Jeffrey Hangst, Professor, Eksperimentel partikelfysik, Institut for Fysik og Astronomi, Aarhus Universitet og talsperson for the ALPHA Collaboration, CERN

Title: Gravitational and Spectroscopic studies of antimatter: the ALPHA antihydrogen experiment at CERN

Abstract: At CERN, we have rather recently become able to study atoms of antihydrogen – the antimatter equivalent of hydrogen.  The question to be addressed is fundamental and profound: “Do matter and antimatter obey the same laws of physics?”  For example, the Standard Model requires that hydrogen and antihydrogen have the same spectrum. The possibility of applying the precision measurement and manipulation techniques of atomic physics to an antimatter atom makes antihydrogen a very compelling testbed for fundamental symmetries such as CPT and the Weak Equivalence Principle. I will discuss the latest development in antihydrogen physics: the first gravitational studies¹ with the new ALPHA-g experiment. ALPHA-g is designed to measure the direction and magnitude of the gravitational acceleration of antimatter in the field of the Earth. I will also review the state-of-the-art of spectroscopic measurements on anti-atoms, including characterisation of the first laser-driven transition (1S-2S), observation of the antihydrogen hyperfine structure, observation of the Lyman-alpha transition, and laser cooling of trapped antihydrogen. To study antihydrogen, it must first be produced, trapped, and then held for long enough to make a measurement – using very few anti-atoms.  I will illustrate the techniques necessary to achieve these many milestones and finally consider the future of antihydrogen studies.

1. Observation of the effect of gravity on the motion of antimatter (ALPHA Collaboration) Nature 621,716–722 (2023).

Dagsorden for generalforsamlingen er:

1. Formandens beretning
2. Godkendelse af regnskab
3. Godkendelse af valgregler (se link herunder)
4. Forslag fra medlemmer
5. Eventuelt

Forslag fra medlemmer kan indsendes til bestyrelsen per mail eller stilles til generalforsamlingen.

Forslag til nye valgregler kan læses her: https://danskfysiskselskab.dk/forslag-regler-for-valg-til-dansk-fysisk-selskabs-bestyrelse/

Har du nogen spørgsmål, er du velkommen til at kontakte os på mail@danskfysiskselskab.dk

Vi glæder os til at se jer til en inspirerende eftermiddag!