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T: Fachverband Teilchenphysik

T 38: Gasgefüllte Detektoren II

T 38.6: Talk

Tuesday, March 20, 2018, 17:45–18:00, Z6 - SR 2.002

Transverse Diffusion in the TPC of the T2K Near Detector — Philip Hamacher-Baumann, Lukas Koch, •Thomas Radermacher, Stefan Roth, and Jochen Steinmann — III. Physikalisches Institut B, RWTH Aachen University

Transverse diffusion affects the spatial resolution in a Time Projection Chamber (TPC). In the TPCs of the T2K near detector it can be derived from the charge distribution on the MicroMeGaS plane. The electron cloud width is reconstructed from the charge fraction detected by the individual anode pads along the track. This cloud width depends on the drift distance between the point of ionization and the MicroMeGaS. From this the transverse diffusion coefficient can be extracted. Care has to be taken of the E-Field and B-Field inhomogeneities, because they can have an impact on the diffusion as well.