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Large Micromegas Sept2012 beamtest run – PartII (21-24.09.2012). T. Alexopoulos, G. Glonti , M. Hoffmann, G. Iakovidis , P. Iengo , Y. Kataoka , V. Lavorini , S. Leontsinis , K. Ntekas , V. Polychronakos , G. Sekhniadze , M. Trovatelli ….
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Large Micromegas Sept2012 beamtest run – PartII (21-24.09.2012) T. Alexopoulos, G. Glonti, M. Hoffmann, G. Iakovidis, P. Iengo, Y. Kataoka, V. Lavorini, S. Leontsinis, K. Ntekas, V. Polychronakos, G. Sekhniadze, M. Trovatelli…..
TEST BEAM SETUP Sept2012 (10.09.2012-30.09.2012) Jura 1480 L1 X Freiburg frame 1250 TOP VIEW veto Sci T1 T7 T3 T5 T5 T3 T7 T1 XY 205 42 727 Beam profile wire chamber x s1 5 s256 s640 z 26 26 26 -θ 15 y finger Sci (SA) s128 170 5 s256 s1 s1 Si1 Si3 SC Si6 SB Y-inverted T8 T2 T6 T4 T4 T6 T2 T8 SB Tmm6 SD (π-,-120GeV/c) Saleve 16 X Tmm5 SIDE VIEW y s1 s640 s1 s1 26 26 26 z x Tmm5 XY 120 x s640 XY XY Tmm2 Tmm2 s640 s1 Si1 Si6 Si3 s64 50 Y-inverted XY XY XY XY X X X X X X X X X X X X X X X X (π-,-120GeV/c) Tmm6 1155 New movable table L1 Tmm3 Tmm3 Info: Ref MM: Tmm2-6, p=0.250mm, sw=0.150mm, gp=5mm Info: Test MM: T1-8, p=0.4mm, sw=0.3mm, gp=5mm Info: L1 (1x1m2): T1-8, p=0.4mm, sw=0.3mm, gp=5mm
Beam Intensity=1.5E5/spill nominal HV value
spill spill [min]
J S APV10 APV11 APV9 APV7 APV6 APV8 APVS APV4 S S S S M M M M 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 connector readout area s513 s1536 s1 s2048 y gas out x beam z X=middle of chamber Y=-720mm Y=-550mm Y=-384mm gas in Y=-94mm
Gas gain measured by L1 Gain=104 from 55Fe
C D strip B A Y=-720mm Y=-550mm Y=-384mm B A D C Y=-94mm Y=0 mm Unterminated strip side
strip Y=1200 mm Readout strip side Y=0 mm Unterminated strip side Y=0 mm Y=1200 mm
η = qR/(qR +qL) A B qL< qR qL>qR qLqR qLqR C qLqR D Ε qLqR D B C Ε A strip
Future Plan for the rest of the run (21.09 to 30.09.2012): • Study uTPC mode using the APV; install APV on T1,2,5,6, leave VMM1 on T3,4,7,8 • Continue scanning L1 on the edges and on the middle junction for different Y • Continue on uTPC mode for L1; use reference chambers X T1 T3 T5 T7 XY s1 s256 s64 s256 s1 T2 T4 T6 T8 Tmm6 L1 beam Tmm5 APV, VMM1 XY Tmm2 1X 1Y 1X 1Y 1X 1Y 1X 1Y Current scheme: 8X 2X 2X 2X 2X 2X 2X 2X 2X XY XY X X X X X X X X 4X 1X 2X 2X 2X 2X 2X 2X 2X 2X 1X 1X 1X proposed scheme: Tmm3
Spatial Resolution for Normal Tracks track • Use reference chambers Tmm2,3,5,6 to define a track • Extrapolate the track to L1 • Calculate residuals Tmm3,2 res strip Tmm6,5 L1
Spatial Resolution of Tmm chambers
track Tmm3,2 res Tmm6,5 L1 cluster position L1 45o correlation
track Tmm3,2 res L1 cluster position [mm] L1 cluster position [mm] Tmm6,5 After correction Resolution is at 93um without taking into account the error coming from the extrapolation of the track. L1 Residuals [mm] Extrapolated track to L1 [mm]
L1 cluster position [mm] L1 cluster position [mm] To remove the extrapolation error of the track, calculate the residuals by including the L1 cluster position into the fit. Final resolution is ~80um as calculated by σ = (σincl*σexcl)1/2 Residuals [mm] Extrapolated track to L1 [mm]
track Tmm3,2 res Tmm6,5 L1 To remove the extrapolation error of the track, calculate the residuals by including the L1 cluster position into the fit. Final resolution is ~80um T2,3,5,6
Connector 7-10 Connector 1&2
Connector 9 strip X[m] (table position) 25/09/12
APV10 APV11 APV9 APV7 APV6 APV8 APVS APV4 S S S S M M M M 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 connector active area s513 s1536 s1 s2048 gas out X=4.252m Y=-0.971m (table position reading) Y=-0.800m Y=-0.634m gas in Y=-0.344m
Efficiency of L1 Connector 9
Efficiency of L1 for two different runs pilars pilars
Resolution and ineff of L1 at the edge, connector 15-16
Version 0.9 Most Important Features • Root Integration + QtRoot + MultiThreading • Online Monitoring (Beam Profile, Time + Charge Distributions, Events Comparison from Trigger+Track • Event Builder • Single Ntuple Maker for both Tracking & Trigger data & Run Info • Run Control Panel • Calibration Run Mode (ongoing work) • many more...
Normal Tracks - Cluster charge at various strip positions strip Y=-0.971m Y=-0.800m Y=-0.634m Y=-0.344m
strip Y=-0.971m Y=-0.800m Y=-0.634m Y=-0.344m
strip Y=-0.971m Y=-0.800m Y=-0.634m Y=-0.344m tmaxin ns of ref & L1 MM
MC 0o CT=60% 2o CT=60% 3o CT=60% 0o no CT
Future Plan for the rest of the run (21.09 to 30.09.2012): • Study uTPC mode using the APV; install APV on T1-4, leave VMM1 on T5-8 • Continue scanning L1 on the edges and on the middle junction for different Y • Continue on uTPC mode for L1; use reference chambers or BAT track X T1 T3 T5 T7 XY s1 s256 s64 s256 s1 T2 T4 T6 T8 Tmm6 L1 beam Tmm5 APV, VMM1 XY Tmm2 1X 1Y 1X 1Y 1X 1Y 1X 1Y Current scheme: 8X 2X 2X 2X 2X 2X 2X 2X 2X XY XY X X X X X X X X 1X 1Y 1X 1Y proposed scheme: 2X 1X 2X 2X 2X 2X 2X 2X 2X 2X 1X or 4X 1X 2X 2X 2X 2X 2X 2X 2X 2X 1X 1X 1X proposed scheme: Tmm3