Search results for "ajautumiskammio"
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Calibration of the muon barrel chambers for the EMMA experiment
2017
The topic of this thesis was position calibration of muon barrel chambers used in the EMMA experiment. A detector ergo plank consist of seven chambers, and there were six uncalibrated detectors. The planks were set in a calibration stack, where there were four reference planks and six uncalibrated planks. Every chamber was divided into channels, and for every chamber, there was a specific position in the chamber. The position for each channel was ascertained by using manually calibrated reference planks and atmospheric muons. The calibration table was created for every chamber to obtain corresponding position for every channel in the chamber. The data collection was being done for approxima…
Efficiencies of the drift chambers in the EMMA experiment
2013
Cosmic rays are high-energy subatomic particles which travel almost at the speed of light all over the space. The shape of the cosmic ray energy spectrum is measured experimentally, but it is not perfectly understood. The slope of the spectrum at high energies is constant up to the knee energy (about 10^15 eV) where the slope steepens. The knee has been tried to be explained by several models which aim to describe the origin and the acceleration mechanisms of the cosmic ray. The stars and the shockwaves from supernova explosions are believed to be at least a part of cosmic ray evolution. The cosmic rays were found in the early 20th century and they have been studied with several methods. Wh…