Exjobbsförslag från företag

Detta är ett uppsatsförslag hämtat från Nationella Exjobb-poolen. Klicka här för att komma tillbaka till samtliga exjobbsförslag.

Förslaget inkom 2011-08-23

Optical observation of aurora on an astrophysical balloon

OBS! ANSÖKNINGSTIDEN FÖR DETTA EXJOBB HAR LÖPT UT.
PoGOLite (Polarized Gamma-ray observer) is an astrophysical balloon
experiment for observing polarisation of gamma rays (25-80 keV) from
astrophysical sources. The experiment was flown on July 7, 2011, on a
balloon from Esrange near Kiruna. Due to balloon leakage the flight
had to be aborted, and only limited data were collected. A re-flight
of the experiment is planned for spring-summer 2012.

Being flown at high latitudes, the balloon also detects X-rays from
the aurora. To characterise the auroral precipitation in the field
of view an optical instrument was designed at the Alfvén laboratory.
This instrument is a narrowband photometer based on a Farbry-Perot etalon
and an inteference filter. The passband is about 0.1 nm, and the
centrewavelength is scanned by tilting the etalon with a step motor
based linear actuator. The emission of interest is 777.4 nm
line of atomic oxygen, a bright feature in the aurora.

The proposed MSc thesis will focus on the analysis of optical data recorded
during the 2011 flight, and further instrument characterisation in preparation
for the 2012 flight. Modeling the observed spectra, including the Rayleigh
scattered solar background is part of the project, as well as conducting
more observations of the night and twilight sky in Stockholm, and possibly aurora.

Your interests include physics, optics and spectroscopy, astronomy and
space physics.

  GÅ TILL XJOBB.NU FÖR FULLSTÄNDIG INFO OM DETTA EXJOBB




Informationen om uppsatsförslag är hämtad från Nationella Exjobb-poolen.