BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Precise Calibration of Large Area Micromegas Detectors Using Cosmi
 c Rays
DTSTART;VALUE=DATE-TIME:20170302T045000Z
DTEND;VALUE=DATE-TIME:20170302T051000Z
DTSTAMP;VALUE=DATE-TIME:20260814T152753Z
UID:indico-contribution-1708@indico.inp.nsk.su
DESCRIPTION:Speakers: Maximilian Herrmann (LMU Munich)\nCurrently m$^2$-si
 zed micropattern detectors with spatial resolution better than 100 $\\mu$m
  and online trigger capability are of big interest for many experiments. \
 nLarge size in combination with superb spatial resolution and trigger capa
 bility implicates that the construction of these detectors is highly sophi
 sticated and imposes strict mechanical tolerances. \nWe developed a method
  to survey assembled and working detectors on potential deviations of the 
 micro pattern readout structures from design value as well as deformations
  of the whole detector\, using cosmic muons in a tracking facility.\n\nThe
  LMU Cosmic Ray Facility consists of two 8 m$^2$ ATLAS Monitored Drift Tub
 e chambers (MDT) for precision muon reference tracking and two segmented t
 rigger hodoscopes with sub-ns time-resolution and additional 10 cm positio
 n information along the wires of the MDTs. \nIt provides information on ho
 mogeneity in efficiency and pulse height of one or several micropattern de
 tectors installed in between the MDTs.\nWith an angular acceptance of $-30
 ^\\circ$ to +30$^\\circ$ the comparison of the reference muon tracking wit
 h centroidal position determination or time projection chamber like track 
 reconstruction in the micropattern detector allows for calibration in thre
 e dimensions. \n    \nWe present results of a m$^2$-sized one-dimensional 
 resistive strip Micromegas detector consisting of two readout boards with 
 in total 2048 strips\, read out by 16 APV25 front-end boards.\nThis 16-fol
 d segmentation along the precision direction in combination with a 10-fold
  segmentation in orthogonal direction by the resolution of the trigger hod
 oscope\, allows for very detailed analysis of the 1 m$^2$ detector under s
 tudy by subdivision into 160 partitions\, each being analyzed separately.\
 n\nWe are able to disentangle deviations from the readout strip straightne
 ss and global deformation due to the small overpressure caused by the Ar:C
 O$_2$ gas flux.  \n\nWe introduce the alignment and calibration procedure\
 , report on homogeneity in efficiency and pulse height and present results
  on deformation and performance of the m$^2$-sized Micromegas.\n\nhttps://
 indico.inp.nsk.su/event/8/contributions/1708/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1708/
END:VEVENT
END:VCALENDAR