Mainz 2014 – scientific programme
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T: Fachverband Teilchenphysik
T 81: Myondetektoren 2
T 81.3: Talk
Wednesday, March 26, 2014, 17:15–17:30, P12
Sandwich Structures as Basic Material for Large Area Micromegas Detectors — •Elias Pree, Otmar Biebel, Ralf Hertenberger, Ulrich Landgraf, and Ralph Müller — LMU München
The small wheel upgrade (NSW) of the ATLAS detector requires large area micromegas detectors of high planarity. Their drift cathodes and readout panels will be based on m2 sized sandwich panels of 0.5 mm FR4 printed circuit board (pcb) material as skins and 10 mm aluminum-honeycomb.
The non-trivial production process will be discussed allowing for planarities below 0.1 mm for the whole surface. Results using different metrological methods to determine the planarity and parallelism will be presented.
Sagging curves measured after application of a defined weight allow for determination of the Young-modulus needed to calculate the bending of the detectors under stress.
Consequences for the application in the NSW will be discussed.