I work within the field of astroparticle physics and conduct research on the high-energy universe through the study of X-/gamma-rays and cosmic rays. I am particularly interested in the design, developemnt and realisation of strategic satellite- and balloon-borne missions, as well as the analysis and astrophysical interpretation of resulting data-sets. Group homepage.

A satellite-borne apparatus used to study charged particles in the cosmic radiation with a particular emphasis on antimatter (antiprotons, positrons, and anti-helium if we're lucky). Distortions to the antiparticle energy spectra may indicate the nature of the dark matter in the Universe. Launched from the Baikonur cosmodrome in Kazakhstan on June 15th 2006, and still going strong.

I lead the PAMELA KTH group where we study cosmic antiparticles. I am also Principal Investigator for the PAMELA anticoincidence system - which was deisgned and built at KTH.

March 2010: I was awarded the 'Wallmarkska priset' by the Royal Swedish Academy of Sciences, "för hans uppfinningsrikedom i instrumentutveckling som resulterat i nya, uppmärksammade rön om förekomsten av antimateria i den kosmiska strålningen".

An outreach project which aims to bring the intellectual and technical challenge of cuttting-edge scientific research to high-school (gymnasium) students. The particular focus of the project is high energy cosmic rays. At first (2005), a network of scintillator detectors was established at schools in the Stockholm region allowing ultra-high energy cosmic ray air showers generated in the atmosphere to be observed. Now-a-days, and in conjunction with Vetenskapens Hus, we give high school students the chance to study cosmic rays using smaller detectors, such as the PFD described below and the Cosmic Ray Telescope.

The PFD is a small hand-held particle detector that was designed to follow Sweden's first astronaut, Christer Fuglesang, to the International Space Station (ISS) in 2006 onboard STS-116. Christer made it into space, but the PFD did not due to an administrative hitch. It was subsequently carried to ISS with STS-122 in 2008 and used by astronaunt Leo Eyharts. Christer finally used PFD on STS-128, which was launched in August 2009 (and I was there!). Data recorded with PFD has been used in undergraduate teaching at KTH, the SEASA project, and the Explore Space tour to Swedish high-schools in 2009. The PFD was returned to ISS on the final shuttle flight in 2011 and will remain there for the foreseeable future.