The 1 st Result of Global Commissioning of the ATALS Endcap Muon Trigger System in ATLAS Cavern Takuya SUGIMOTO (Nagoya University) On behalf of TGC Group ~ Contents ~ 1. ATLAS Level 1 Trigger 2. Endcap muon trigger system 3. Global Commissioning Run (Milestone-3 run) 4. Results 5. Summary T. Sugimoto (Nagoya-U)
Introduction T. Sugimoto (Nagoya-U)
LHC-ATLAS Experiment Barrel muon chamber EM calorimeter Inner tracker 7 Te. V proton Solenoid magnet 25 m Barrel toroidal magnet Endcap muon chamber 45 m Endcap toroidal magnet T. Sugimoto (Nagoya-U) Hadron calorimeter TWEPP 07, Prague, 5 -Sept-2007 3
ATLAS Level 1 Trigger Calorimeter Trigger • Characteristics Muon Trigger Endcap Muon Trigger (TGC based) Front-end Preprocessor – Rate reduction: 1 GHz 100 k. Hz – Decision time: < 2. 5 ms Jet/ – Only raw electronic signals are used Cluster Processor • Muon Trigger System Energy-sum Processor Barrel Muon Trigger (RPC based) Muon Trigger/CTP Interface – Endcap (1. 05<|h|<2. 4) • Thin Gap Chamber (TGC) Central Trigger Processor – Barrel (|h|<1. 05) TTC • Resistive Plate Chamber (RPC) – Air-core super-conducting toroidal magnet (Endcap and Barrel) Barrel Toroidal Magnet Endcap Toroidal Magnet TGC 1 Big Wheel T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 4
Thin Gap Chamber • Structure – Similar to MWPC – Wire : 50 mm gold-plated Tungsten – Anode-Cathode Gap : 1. 4 mm – Wire-Wire Gap : 1. 8 mm – 2 -dimentional readout (wire, strip) – Cathode plane: carbon (~MW/cm 2) – Trapezoidal shape (~2 m 2) • Operation condition – Gas : CO 2 + n-C 5 H 12 (55: 45) – High Voltage : +2. 9 k. V – Operation Mode : Limited Proportional – Gas Gain : ~106 • Production and Inspection – In total 3600 chambers were produced in Japan (KEK), Israel (Weizmann) and China (1999 – 2006) T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 5
Endcap Muon Trigger System • Big Wheel – Triplet (TGC 1), middle doublet (TGC 2) and pivot doublet (TGC 3) – Each BW consists of 12 sectors 72 sectors are required. • Measurement items – muon hit position – Rough Pt momentum trigger if Pt > 6 Ge. V 1. Connect the IP and hit point on TGC 3 Infinite momentum track 2. Hit signal on TGC 1&2 is found in window 1&2. Pt > 6 Ge. V 3. Pt information is divided into 6 Pt threshold using LUT. 4. Pt threshold and hit position MUCTPI T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 6
TGC Assembly at CERN 1/12 sector Assembly (Oct. 2005 ~ Aug. 2007) (detail T. Kubota's poster) TGC Big Wheel Assembly (Jul. 2006~) Sector Transportation T. Sugimoto (Nagoya-U) 5 wheels assembled TWEPP 07, Prague, 5 -Sept-2007 7
Installation of Electronics Modules 22 m TGC Big Wheel 19” Mini-Rack + HSC, SSW, HPT (CTM) + LV, HV + Optical PP T. Sugimoto (Nagoya-U) Optical Fiber (~100 m) On-Detector Module Counting Room (USA 15) + CCI, SL, ROD, TTC + SPP, SLB + VME Crate, SBC + DCS modules Prague, 5 -Sept-2007 TWEPP 07, + Optical PP 8
ASICs for TGC Electronics TGC 1 TGC 2 TGC 3 ASD PS-Board on TGC chambers SLB ASIC 3/4 Coin. Readout PP delay BCID HSC(VME) (Big Wheel edge) H-Pt wire VME 64 Crates (USA 15) Trigger crate Sector Logic H-Pt JRC DCS-PS Doublets H-Pt strip Readout crate ROD ASD PP delay BCID ASD SLB ASIC 2/3 Coin. Readout PP delay BCID DCS-PS Service PP ASD card T. Sugimoto (Nagoya-U) Control crate JRC Triplet CAN H-Pt Board SSW HSC SLB PP CCI TTCvi DCS LCS TTC signal fanout to PS-Boards TTCrq TWEPP 07, Prague, 5 -Sept-2007 PS Board 9
Antifuse FPGAs for TGC Electronics TGC 1 TGC 2 TGC 3 ASD PS-Board on TGC chambers PP delay BCID JRC SLB ASIC 3/4 Coin. Readout PP delay BCID PS Board VME 64 Crates (USA 15) Trigger crate JRC DCS-PS Doublets ASD HSC(VME) (Big Wheel edge) conv H-Pt wire H-Pt strip PP SLB ASIC delay 2/3 Coin. BCIDReadout PP delay BCID Sector Logic Readout crate ROD SSWRX VME H-Pt Board SSW VME Control crate JRC Triplet DCS-PS HSC CCI VME TTCvi Service PPCAN SSWTX SSW Board TTC signal fanout TTCrq to PS-Boards T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 HSC Board 10
Global Commissioning T. Sugimoto (Nagoya-U)
TGC for Global Commissioning Run <Main purpose of Global Commissioning> 1. 2. 3. Provide Trigger Signal to whole sub-detectors mainly MDT End. Cap Read out TGC data via ROD-ROS link Join TGC segment to the ATLAS central DAQ system MDT TGC 1 Sector 09 TGC 1 Chamber condition + Gas: CO 2 100% + HV: 2. 8 k. V + Eff: ~20% T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 12
TGC Electronics TGC 1 TGC 2 TGC 3 ASD On TGC chambers PS-Board Big Wheel edge Counting Room HSC(VME) crate SLB ASIC 3/4 Coin. Readout PP delay BCID H-Pt wire DCS-PS R f JRC Doublets VME 64 crates Trigger crate H-Pt strip Sector Logic PP delay BCID SLB ASIC 2/3 Coin. Readout PP delay BCID DCS-PS CAN ROB Control crate HSC CCI TTCvi Service PP Readout SSW JRC Triplet MUCTPI Readout crate ROD ASD Trigger DCS LCS Control TTC CTP TTC signal fanout to PS-Boards TTCrq T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 13
Setup for Global Commissioning On TGC chambers TGC 1 Big Wheel edge Counting Room HSC(VME) crate Specially designed modules instead of HPT CTM VME 64 crates Trigger crate Sector Logic Trigger MUCTPI Readout crate ASD 1 -station coincidence PP delay BCID m SLB ASIC 2/3 Coin. Readout PP delay BCID ROD DCS-PS Control crate HSC CCI TTCvi Service PP CAN ROB SSW JRC Triplet Readout DCS LCS Control TTC CTP TTCrq T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 14
Commissioning Trigger Module (CTM) Input From PS boards (LVDS) • Functionality – 11 FPGAs • XILINX SPARTAN XC 2 S 50 E • 10 are used for Rx (LVDS). – Take all OR , mask any inputs • 1 is used for Tx (NIM). VME Rx – CPLD: VME control. • XILINX XC 2 C 256 P • Purpose Tx – Trigger output is asserted by all trigger matrices on SLB ASIC. – Usable to give 1 -station trigger signal It is impossible for HPT – Various trigger pattern by input mask Output To SL (NIM) • wire only / strip only / wire & strip T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 15
Local Trigger Path On TGC chambers TGC 1 Big Wheel edge Counting Room HSC(VME) crate CTM VME 64 crates Trigger crate No logic No LUT Fixed Pt Sector Logic Readout crate ASD 1 -station coincidence PP delay BCID SLB ASIC 2/3 Coin. Readout PP delay BCID ROD L 1 A SSW Control crate JRC DCS-PS Triplet HSC CCI TTCvi Service PP CAN TTCrq T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 16
Vth vs Trigger Rate • • half sector 2/3 coincidence (wire) Gas: CO 2 100% HV: 2. 8 k. V • good separation between S/N with threshold of 100 m. V • finally, we got stable 8 Hz of trigger from FULL TGC 1 sector 9 and fed them to CTP ( they found it in their system ) T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 17
Control Path On TGC chambers Big Wheel edge Counting Room HSC(VME) crate • CCI-HSC link – Optical communication module CTM • CCI: VME Slave • HSC: VME Master • JRC (Jtag Route Controller) ASD PP delay BCID SLB ASIC 2/3 Coin. Readout JRC DCS-PS Triplet VME 64 crates Trigger crate Sector Logic Readout crate ROD SSW G JTA I 2 C PP delay BCID Standard VME Protocol TGC 1 Control crate HSCCCI-HSC Link CCI (optical) TTCvi Service PP CAN TTC signal fanout to PS-Boards TTCrq T. Sugimoto (Nagoya-U) DCS LCS SBC Control Reset TWEPP 07, Prague, 5 -Sept-2007 18
Global Trigger Path On TGC chambers TGC 1 Big Wheel edge Counting Room HSC(VME) crate CTM VME 64 crates Trigger crate Sector Logic No logic No LUT Fixed Pt MUCTPI Readout crate ROD ASD PP delay BCID SLB ASIC 2/3 Coin. Readout PP delay BCID SSW Control crate JRC DCS-PS Triplet CTP HSC CCI L 1 A Clock TTCvi Service PP CAN TTC signal fanout to PS-Boards TTCrq T. Sugimoto (Nagoya-U) L 1 A Clock TWEPP 07, Prague, 5 -Sept-2007 MDT-EC 19
TDC Distribution of MDT RPC TGC+MDT Dt = t. TGC – t. RPC – t. TOF ~ 130 nsec Provide Trigger to whole ATLAS system!! T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 20
Track Reconstruction by MDT T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 21
Readout Path On TGC chambers TGC 1 Big Wheel edge Counting Room HSC(VME) crate • Local readout system – Special dump module for SSW data (spy mode) – Used for quick check w/o ROD CTM VME 64 crates Trigger crate Sector Logic Readout crate ROD ASD PP delay BCID SLB ASIC 2/3 Coin. Readout PP delay BCID SSW Control crate ROB Local Readout JRC DCS-PS Triplet HSC CCI TTCvi Service PP CTP CAN TTC signal fanout to PS-Boards TTCrq T. Sugimoto (Nagoya-U) Readout L 1 A, Clock TWEPP 07, Prague, 5 -Sept-2007 22
Measurement of L 1 A latency Test Pulse with L 1 A Signal Track Pattern PP L 1 Buffer SSW 2/3 CTM count MUCTPI ch layer 3 T. Sugimoto (Nagoya-U) SL SLB ASIC layer 1 layer 2 Local Readout system CTP + TTC L 1 A Latency is 76 clocks = 1. 90 msec (< 2. 5 msec) Estimation: 75 clk (by O. Sasaki, 2004) TWEPP 07, Prague, 5 -Sept-2007 23
Hit Profile for cosmic-ray test Wire Hit Profile of Endcap Region layer 1 T 5 T 6 • • T 7 T 8 layer 2 2/3 coincidence (wire) Vth = 100 m. V Gas: CO 2 100% HV: 2. 8 k. V layer 3 ch ( = R) • first data taken by Strip Hit Profile of Endcap Region layer 1 T 5 T 6 T 7 local Readout path T 8 • chambers are working fine • We are triggering cosmic-muons layer 2 T. Sugimoto (Nagoya-U) • trigger & readout path are working fine !! TWEPP 07, Prague, 5 -Sept-2007 24
Summary • Provide trigger signal to ATLAS global DAQ system – TGC 1 sector was used. • 1 station coincidence CTM board instead of HPT board – Cosmic ray muons are triggered successfully in ATLAS cavern. • Trigger & Readout path are working fine. • Measured latency is consistent with estimated value (1. 9 msec) • MDT reconstructed the cosmic muon trajectory using TGC trigger. • Plan toward Physics Run – Extend number of operational sectors • 3 station coincidence run done during the latest commissioning run – Timing Adjustment between stations. – Beam halo & single beam run Full system operation should be tested before starting physics run!! T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 25
Backup slides T. Sugimoto (Nagoya-U)
Trigger Logic T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 27
Multiplicity Distribution (events triggered by TGC) Wire + Strip wire Strip Wire + Strip running with CO 2 ( log ) reasonable T. Sugimoto (Nagoya-U) TWEPP 07, Prague, 5 -Sept-2007 28
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