ATLAS Muon Spectrometer and Chinese Activities Zhu Chengguang Shandong University First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

ATLAS Muon Spectrometer includes Magnetic system Precision chamber system MDT(Monitored Drift Tube), CSC (Cathod Strip Chamber) Trigger chamber system RPC(Resistant Plate Chamber), TGC (Thin Gap Chamber) First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Magnet System ATLAS MUON Spectrometer Field integral vs. eta for infinite momentum muons. Each curve corresponds to a fixed azimuthal angle. First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Precision Chamber ATLAS MUON Spectrometer Produced in IHEP MDT is made of Drift Tubes, Monitored due to its large size. 320000 tubes The longest drift time: 480ns, around 20 times of LHC bunch-crossing <σ>=80μm for signle tube Dead area in between neighbour chambers for barrel, longest as 1700mm Produced in IHEP First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Muon reconstructed in simulation ATLAS MUON Spectrometer Muon reconstructed in simulation endcap η Sector number  9 11 13 15 1 3 5 7 9 barrel endcap φ First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

ATLAS MUON Spectrometer CSC is MWPC with <σ>=80μm spatial resolution 32 Chambers – 16 chambers per side, covering 2<|η|<2.7 of inner EC Layer max drift time 25ns+ 2nd coordinate measurement itself； Inclined to interaction point First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Muon momentum measurement ATLAS MUON Spectrometer Muon momentum measurement Single muon Pt resolution (simulation) Inner tracker Muon spectrometer First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

ATLAS MUON Spectrometer F. Cerutti, muon week Nov 2006 ATLAS MUON Spectrometer Blue not installed Red installed Violet : partly installed Side A Side C 8 7 6 5 4 3 2 10 11 1 16 15 14 13 12 9 8 7 6 5 4 3 2 10 11 1 16 15 14 12 9 Chamber testing underway: HV, gas tightness, alignment, DCS… Full commissioning up to cosmics only in sectors 13 (part of the chambers) Total Missing chambers :126/680 ~ 19%, 2~3 months of work needed First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Last MDT Sector （Endcap）Assembled ATLAS MUON Spectrometer Last MDT Sector （Endcap）Assembled Secor installation and service system commissioning is planned for early next year from S. Palestini First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

CSC Integration and testing ongoing at CERN (B184) ATLAS MUON Spectrometer CSC Integration and testing ongoing at CERN (B184) Mechanical integration with support frames & electronics testing underway and is 32/32 complete Global alignment fixtures to be integrated with chambers Surface Installation will take place from F. Tylor CSC Integration in B184 First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Trigger Chambers ATLAS MUON Spectrometer Time resolution is better than 25ns Provide second coordination measurement for MDT SM TGC only provide second coordination measurement Produced in SDU First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Trigger scheme ATLAS MUON Spectrometer triplet TGC doublet TGC doublet RPC Trigger scheme：Pivot station  Intersecting points  Coincidence window First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

TGC assembly status ATLAS MUON Spectrometer in the pit complete stored / final test being assembled components at CERN components to be delivered Legenda: TGC 1 – C in the pit TGC 2 – C complete TGC 3 - C TGC 1 - A TGC 3 - A TGC 2 - A TGC-C-3 completed in Dec.; TGC-A-1 and TGC-A-2 started and will be stored First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

ATLAS MUON Spectrometer First TGC Big Wheel has been installed First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Chinese activities on Muon Detector Production IHEP: 32 MDT chambers of type BEE and 16 chambers of type BIS.8 SDU: 400 TGC chambers USTC: Testing of all TGC front-end electronics First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Chinese Activities Chinese Activities In Nov. 1999，a memorandum of understanding was made between CERN and NSFC( Natural Science Foundation of China), declaring that China participates the ATLAS and CMS collaboration Institute of High Energy Physics (IHEP), Nanjing University (NJU), Shandong University (SDU), University of Science and Technology of China (USTC) joined the collaboration as Chinese Cluster. Supports also came from Ministry of Science and Technology of China and Academy of Science of China. First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Mar. 2004, site review was held in IHEP Chinese Activities MDT production（IHEP) Mar. 2004, site review was held in IHEP First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Mass production Chinese Activities First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

MDT mass production Chinese Activities wire position scan The precision of wire position is required to be 20m Measurement of wire position  rms of 7.5 µm wire position scan Rejection rate  1% First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Production task status Chinese Activities Production task status Until early 2006, production was complete, and all were transported to CERN for testing with X-ray tomography。  Qualified tubes ~99%.  Assembly qualities were well under control. First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Integration & Commissioning Chinese Activities Integration & Commissioning Gas system：gas distribution system, gas leak test; Control system：temperature sensor, magnet sensor, alignment system; electronics：HV, readout,shielding; Cosmic ray test：noise、efficiency,timing; Gas system testing Electronics testing First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Design of installation for BEE Chinese Activities Design of installation for BEE  Improvement of installation structure ；  Design of installation of service system ; Installation of magnet sensor First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Site review was held in Sep. 2002 Chinese Activities TGC Production (SDU) Site review was held in Sep. 2002 First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Mass production of TGC Chinese Activities First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Detector production vs Time Chinese Activities Detector production vs Time First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Quality Control Chinese Activities Flatness control of chamber Resistance control of cathode plane 0.5~1.5MΩ Flatness control of doublet First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

TGC HV training Uniformity test Chinese Activities Check the electronic performance of channels automatically with cosmic rays The uniformaty test system produced by USTC is used at CERN for certification of all TGCs after transportation. First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Efficiency Scan Chinese Activities 4 scans for wire and strip each doublet Color with low efficiency corresponding to supporters White with excellent efficiency First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

ATLAS-MUON leader G. Mikenberg on Dec. 17, 2004 Chinese Activities ATLAS-MUON leader G. Mikenberg on Dec. 17, 2004 ……… “…(tested) 98 doublets (196 chambers), … have excelled in all aspects; in particular, …the inefficiency area never exceeded 1% (the qualification criteria has been set at <5%) and all the detectors have pass the radiation test without any need of training. This is indeed an outstanding performance … By the end of 2004, all chambers were compeleted and transportation to CERN finished in 2005 A team consisting of 3 engineers from SDU is working on the TGC commissioning at CERN now First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

TGC frontend electronics test (USTC) Chinese Activities TGC frontend electronics test (USTC) USTC designed an automatic testing system for the TGC frontend readout card: ASD(Amplifier Shaper Discriminator) Finished the test of all 25000 ASDs By the way: NJU produced 330 copper absorbers for the endcap calorimeter. First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13

Summary Muon spectrometer commissioning goes well, some in advance. Chinese cluster was involved late, but did good work and made contributions. First Chinese-French Workshop Zhu Chengguang Beijing 2018/11/13