the interaction of the laboratori nazionali di frascati – infn with te-mpe-em workshop
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The interaction of the Laboratori Nazionali di Frascati – INFN with TE-MPE-EM Workshop. G. Bencivenni LNF-INFN Frascati - Italy. GEM for the LHCb experiment (past) GEM for the Cylindrical-GEM (C-GEM) of KLOE-2 experiment (present) - PowerPoint PPT PresentationTRANSCRIPT
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The interaction of the Laboratori Nazionali di Frascati– INFN with
TE-MPE-EM Workshop
G. BencivenniLNF-INFN
Frascati - Italy
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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)
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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).
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The Cylindrical-GEM of KLOE-2 (2011-2012)
4 CGEM layers with radii from 13 to 21 cm from IP and before KLOE Drift Chamber inner wall
700 mm active length
XV strips-pads readout (25o÷30o stereo angle)
1.5% X0 total radiation length in the active region
3 mm
2 mm2 mm
2 mm
Cathode
GEM 1GEM 2
GEM 3
Anode
Read-out
Cylindrical Triple GEM
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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
The first 3 layers of CGEM
The gluing of the 3 GEM foils
700 mm
up to
1200
mm
Detail of readourt board
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LHCb muon 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).
# chambers /
size(w/out spares)
Total GEM foil area
M2R1 M2R2
n. 48 ~30x25 cm2
n. 96 ~60x27 cm2
~54 m2
R1-R2 of M2
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Cylindrical GEM for BES III - Beijing-China (2013-2015)
?1620
?318
?431.5
?562
?497
724
2174
1952
1782
1612
1442
12721092
910870
2582
?349
?118
?126
10461070
?359
-1
-1
?730
?690.5
?626.5
?367.8
G
24-M8(沿8圆周 等分)
F
B
H
P-P 1 1剖旋转( : )
R
K
?1620
?318
?431.5
?562
?497
724
2174
1952
1782
1612
1442
12721092
910870
2582
?349
?118
?126
10461070
?359 -1
-1
?730
?690.5
?626.5
?367.8
G
24-M8(沿8圆周 等分)
F
B
H
P-P 1 1剖旋转( : )
R
K
Dimensions of the Inner Tracker :
Rmin = 63 mm; Lmin=780mmRmax=162 mm; Lmax=870mm
Number of CGEM layers = 4 w/stereo XV readout configuration
Drift chamber
Existing Inner Tracker (wire-chamber) to be replaced with 4 layers of Cylindrical GEM
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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
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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.