William Lejon, master student in theoretical physics, Fysikum.

William Lejon has completed the bachelor's programme in physics at Fysikum and is now studying the master's programme in theoretical physics.

"I am 23 years old and will be 24 in August. I was born and raised in Stockholm. My family consists of a younger brother (21), mum (60) and dad (68). My interest in physics started when I was 6-7 years old and read about the planets in the solar system."

Master's thesis on neutron scattering and spallation

The European Spallation Source (ESS) is a research facility under construction in Lund. ESS will initially house 15 different science instruments based on neutron scattering after spallation. Spallation is the process by which the atomic nuclei of a heavy metal become unstable and emit neutrons after being bombarded with protons. HIBEAM-NNBAR is a proposed two-stage programme of experiments designed to search for neutrons that convert to antineutrons and/or sterile neutrons. 

William is currently working on his master's thesis which he plans to present in June.
"My thesis is about AI applications for the HIBEAM and NNBAR experiments. My studies have been hard but very rewarding. It was extra hard to study during covid."

Williams' recommendations to other physics students

"They can take it easy. Even if you sit in a lecture and feel like you don't understand, it's okay. The important thing is not that you understand now, or tomorrow, or even in a week. Physics is something you learn throughout your studies and you will be fine as long as you keep trying."

More information on the educations

Bachelor Programme in Physics, 180 credits

Master's Programme in Theoretical Physics, 120 credits

Machine learning applications for the HIBEAM-NNBAR experiment at the European Spallation Source - Candidate thesis presented in 2022