KLOE-2 Inner Tracker: the First Cylindrical GEM Detector

Collaboration
for the collaboration.
Oct 8, 2017
5 pages
Published in:
  • PoS EPS-HEP2017 (2017) 491
Contribution to:
  • Published: Oct 8, 2017 by SISSA

Citations per year

20182019202001
Abstract: (SISSA)
KLOE-2 at the DAΦ\PhiNE e+ee^+ e^- collider is the main experiment of the INFN Laboratori Nazionali di Frascati (LNF) and is the first high-energy experiment using GEM technology with a cylindrical geometry, a novel detector developed at LNF exploiting kapton properties. Four concentric cylindrical triple-GEM detectors compose the Inner Tracker, inserted around the interaction region and before the inner wall of the pre-existing KLOE Drift Chamber, to improve the resolution on decay vertices close to the interaction point and reconstructed from low-momentum charged secondaries.State-of-the-art solutions have been expressly developed or tuned for this project: single-mask GEM etching, now used also for several LHC experiments upgrades, multi-layer XV patterned readout circuit, PEEK spacer grid, GASTONE front-end board a custom 64-channel ASIC with digital output, and the Global Interface Board for data collection, with a configurable FPGA architecture and Gigabit Ethernet. Alignment and calibration of a cylindrical GEM detector was never done before and represented one of the experiment's challenging activities. The first set of alignment and calibration parameters obtained with cosmic-ray muon data has been used to validate the integrated tracking and vertexing using both Inner Tracker and Drift Chamber information, exploiting the Kalman filter technique. Results obtained with ϕπ+ππ0\phi\to \pi^+ \pi^- \pi^0 and KSπ+πK_S \to \pi^+ \pi^- samples will be reported.KLOE-2 is presently taking data with the aim of collecting more than 5 fb1^{-1} by March 2018.The success of the cylindrical GEM technology developed by the KLOE-2 collaboration paved the way to its usage in other high-energy physics experiments, among these is the BES III experiment at BEPC II.
  • activity report
  • muon: cosmic radiation
  • gas electron multiplier
  • tracking detector: design
  • spatial resolution
  • track data analysis
  • calibration
  • alignment
  • integrated circuit
  • KLOE