The interaction of the Laboratori Nazionali di Frascati – INFN with TE-MPE-EM Workshop

1. The interaction of the LaboratoriNazionalidiFrascati– INFN with TE-MPE-EM Workshop G. Bencivenni LNF-INFN Frascati - Italy

2. GEM for the LHCb experiment (past) • GEM for the Cylindrical-GEM (C-GEM) of KLOE-2 experiment (present) • GEM for the possible upgrade of the muon apparatus of LHCb (future) • GEM for the possible upgrade of the Inner Tracker of BESIII (future)

3. GEM for the first Muon Wall of LHCB In collaboration with INFN-Cagliari we built 24 (+6 spares) triple-GEM detectors with pad readout (2005-2006). While the R&D and then the interaction with Rui started in 2000). The size of the GEM was 20x24 cm2(active area). The TE-MPE-EM Workshop built the 90 (+20spares) GEM foils with the double-mask technique. The readout boards were realized by ELTOS (Italy).

4. Read-out Anode 2 mm GEM 3 2 mm GEM 2 2 mm GEM 1 3 mm Cathode Induction Transfer 2 Transfer 1 Conversion & Drift The Cylindrical-GEM of KLOE-2 (2011-2012) • 4 CGEM layers with radii from 13 to 21cm from IP and before KLOE Drift Chamber inner wall • 700 mm active length • XV strips-pads readout (25o÷30o stereo angle) • 1.5% X0total radiation length in the active region Cylindrical Triple GEM

5. The TE-MPE-EM workshop produced, on the basis of our design, with single-mask technology the GEM foils (up to about 400x700 mm2 active area) and also the readout foils (on kapton substrate): - GEM  n. 48 large foils - Readout boards  n. 16 large foils - Cathode/Drift  n. 12 large foils Detail of readourt board The gluing of the 3 GEM foils up to 1200 mm The first 3 layers of CGEM 700 mm

6. LHCbmuon upgrade with GEM (2014-2017) For the upgrade of most irradiated parts of the muon system, regions R1-R2 of station M2 , GEM is proposed as a possible rad-hard technology (particle fluxes up to 1 MHz/cm2 at the upgraded luminosity of 2x10 33 s-1cm-2). R1-R2 of M2

7. Cylindrical GEM for BES III - Beijing-China (2013-2015) Drift chamber Dimensionsof the InnerTracker : Rmin = 63 mm; Lmin=780mm Rmax=162mm; Lmax=870mm Numberof CGEM layers = 4 w/stereo XV readoutconfiguration Existing Inner Tracker (wire-chamber) to be replaced with 4 layers of Cylindrical GEM

8. Request for the TE-MPE-EM Workshop by BESIII: GEM  n. 16 GEM foils of ~ 800-900 mm active length, 300-400 mm wide Cathode  n. 8 foils ~ 800-900 mm active length, 300-400 mm wide Readout boards  n. 8 XV readout pattern (à la KLOE or Compass) ~ 800-900 mm active length, 300-400 mm wide

9. Conclusions After about 12 years of interaction/collaboration with the TE-MPE-EM Workshop, for sure we can says that it was a very positive and fruitful experience. But with the increase of requests from users and the busy schedules both in production and in the R&D of new structures, sometimes the biggest problem was the (not negligible) delay in the delivery of the requested materials. In addition, I personally think that Rui should be helped by a person, who should keep contacts (interface) with the various manufacturers of detectors.