By Jonathan Bortfeldt
This ebook discusses a unique and high-rate-capable micro trend gaseous detector of the Micromegas (MICRO-MEsh fuel detector) style. It offers an in depth characterization of the functionality of Micromegas detectors at the foundation of measurements and simulations, besides an in-depth exam of research and reconstruction equipment. The actual and effective detection of minimal ionizing debris in high-rate heritage environments is established. the superb functionality decided right here for those light-weight detectors will make attainable the stay clinical imaging of a sufferer in the course of ion-beam treatment.
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Extra resources for The Floating Strip Micromegas Detector: Versatile Particle Detectors for High-Rate Applications
Example text
1 the net drift vector may even point into the same direction as B. Diffusion of electrons perpendicular to the magnetic field is strongly suppressed, as the field forces the electrons on a helix around the magnetic field lines. In Time-Projection-Chambers, this is used to improve the spatial resolution, which would suffer from large electron diffusion. In the following, the magnetic field is assumed to be zero. 05 vd [mm/ns] Fig. 4 Electron drift velocity as a function of the electric drift field for various Ar:CO2 gas mixtures at 20 ◦ C and 1013 mbar, computed with MAGBOLTZ (Biagi 1999).
E. the measured pulse height spectra are not adequately described by a Landau function, the maximum of the distribution is correctly described by Eq. 3). In order to extract the measured most probable pulse height from the distribution of pulse heights, the distribution is fitted with a Landau function, convoluted with a Gaussian. The straggling can thus be absorbed into the Gaussian function. e. 1 Properties of typical elementary and molecular detector gases at 20 ◦ C and 1013 mbar (Beringer et al.
Strictly speaking, these low-field effects are not correlated to the electron mesh transparency, although all effects, leading to the observed drift field dependence of the pulse height are often subsumed in the term mesh transparency, that is used as synonym for the transparency of the mesh for electrons. 368 for a wire diameter of 25 µm. Fortunately, the transparency of the mesh for electrons is much higher, as the high electric amplification field extends into the mesh holes and guides electrons around the wires into the high field region.
