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T: Fachverband Teilchenphysik
T 29: TPC und Micromegas
T 29.4: Vortrag
Montag, 9. März 2015, 17:30–17:45, I.12.02 (HS 31)
High-Rate Capable, Low-Material Budget Floating Strip Micromegas — •Jonathan Bortfeldt, Otmar Biebel, Bernhard Flierl, Johannes Grossmann, Ralf Hertenberger, Philipp Lösel, Ralph Müller, Elias Pree, and Stefanie Pritzl — LS Schaile, LMU München
Floating strip Micromegas are versatile and high-rate capable particle detectors. Single particle tracking of medium-energy ions at fluxes up to 7 MHz/cm2 is possible, stable operation at rates of 2 GHz has been observed. Due to the nearly floating copper anode strips the detector is highly discharge tolerant.
A detector system consisting of four low-material budget floating strip Micromegas with an active area of 6.4 cm×6.4 cm and a scintillator based range telescope has been tested in 23 MeV proton beams at the tandem accelerator Garching. Fast Ne:CF4 based gas mixtures have been investigated which allow for a further increase of the high-rate capability by a factor of three. A synchronous readout of the strip detectors and the range telescope has been achieved.
We report on the track inclination reconstruction capabilities in a single detector plane and on the measured electron drift velocity with the new gas mxitures. We furthermore present ion range radiography measurements with the combined system.