Sökning: "Astroparticle physics"

Visar resultat 21 - 25 av 37 avhandlingar innehållade orden Astroparticle physics.

1. 21. A New Measurement of Low Energy Antiprotons In the Cosmic Radiation

   Författare :Petter Hofverberg; Mark Pearce; Stephane Coutu; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cosmic radiation; antiprotons; solar modulation; Astroparticle physics; Astropartikelfysik;

   Sammanfattning : New measurements of the antiproton flux and the antiproton-to-proton flux ratio at the top of the atmosphere between 80 MeV and 2.0 GeV are presented. The measurement was conducted from July 2006 to March 2008 with the PAMELA satellite experiment. LÄS MER

3. 22. Imaging the high energy cosmic ray sky

   Författare :Petter Hofverberg; Mark Pearce; Bob van Eijk; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astroparticle physics; Astropartikelfysik;

   Sammanfattning : The Stockholm Educational Air Shower Array (SEASA) project is deploying an array of plastic scintillator detector stations on school roofs in the Stockholm area. Signals from GPS satellites are used to time synchronise signals from the widely separated detector stations, allowing cosmic ray air showers to be identified and studied. LÄS MER

4. 23. Pre-Flight Development of the PoGOLite Pathfinder

   Författare :Mózsi Kiss; Mark Pearce; Gottfried Kanbach; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astroparticle physics; Astropartikelfysik;

   Sammanfattning : The Polarized Gamma-ray Observer (PoGOLite) is a balloon-borne instrument that will measure gamma-ray polarization in the energy range 25-80 keV from astronomical sources such as pulsars, accretion discs and jets from active galacticnuclei. The two additional parameters provided by such observations, polarizationangle and degree, will allow these objects to be studied in a new way, providing information about their emission mechanisms and geometries. LÄS MER

5. 24. Performance Studies and Star Tracking for PoGOLite

   Författare :Cecilia Marini Bettolo; Mark Pearce; Nicolas Produit; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polarization; pulsars; x-ray; PoGOLite; Astroparticle physics; Astropartikelfysik;

   Sammanfattning : PoGOLite is a balloon-borne experiment, which will study polarized soft γ-ray emissionfrom astrophysical targets in the 25-80 keV energy range by applying well-typephoswich detector technology. Polarized γ-rays are expected from a wide variety of sources including rotation-powered pulsars, accreting black holes and neutron stars,and jet-dominated active galaxies. LÄS MER

7. 25. Studies of positron identication with the PAMELA calorimeter

   Författare :Laura Rosetto; Mark Pearce; Christophe Clement; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astroparticle physics; Astropartikelfysik;

   Sammanfattning : .... LÄS MER