Particle Physics, Astrophysics and Quantum Field Theory. The Status of the CMS Experiment
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1 75 Years Since Solvay Particle Physics, Astrophysics and Quantum Field Theory The Status of the CMS Experiment Dan Green Fermilab Singapore, Nov.,
2 The LHC Accelerator The ATLAS Detector Outline The Surface Assembly Hall Magnet Test and Cosmic Rays Lowering CMS into the Collision Hall Cosmic ray tests in the Collision Hall LHC Beam in 2008 Software and Computing Data and the Grid Singapore, Nov.,
3 Why the LHC the Terascasle? Physics at the LHC corresponds to conditions around here Singapore, Nov.,
4 Create Dark Matter at the LHC? Supersymmetric particles? A stable weakly interacting particle of mass ~ 1 TeV has a relic density ~ dark matter Singapore, Nov.,
5 The CERN Site Large Hadron Collider 27 km circumference Lake Geneva CMS LHCb ALICE ATLAS Singapore, Nov.,
6 The LHC Accelerator The LHC machine is fully installed and was ready to start operation with single beams on 10 th September 2008, but it is now delayed for several months until next spring after an incident that happened on September 19. Singapore, Nov.,
7 The Last Dipole Magnet, April ,000 km underground transport at a speed of 2 km/h! Singapore, Nov.,
8 LHC Accelerator - Dipoles To reach the required energy in the existing tunnel, the dipoles operate at 8.3 T & 1.9 K in superfluid helium. Colder that outer space - CMB Singapore, Nov.,
9 The Interaction Points Special quadrupole magnets ( Inner Triplets ) focus the particle beams to reach the highest densities ( luminosity ) at their interaction point in the center of the experiments Singapore, Nov.,
10 A Needle in a Haystack Singapore, Nov.,
11 The ATLAS Detector 45 m 24 m 7000 Tons Singapore, Nov.,
12 The ATLAS Cavern Singapore, Nov.,
13 Installation of the ATLAS Barrel Tracker (Aug 2006) Singapore, Nov.,
14 The Compact Muon Solenoid Basic design choice was a large solenoid with calorimetry inside and muon detection in the flux return yoke. Singapore, Nov.,
15 The CMS Collaboration Member States Non-Member States USA Total Member States Non-Member States USA Total Number of Laboratories Nr of Scientific Authors Scientific Authors 38 Countries 175 Institutions Belgium Austria Bulgaria Finland USA CERN France Germany Greece Russia Hungary Italy Uzbekistan Ukraine Georgia Belarus UK Poland Armenia Portugal Turkey Brazil Serbia China, PR Spain Pakistan China (Taiwan) Lithuania Switzerland Mexico Korea Iran Colombia New-Zealand Croatia Ireland India Cyprus Estonia Oct. 3rd 2007/gm Singapore, Nov.,
16 Assembly Hall SX5 Hadron Calorimeter inside the magnet, Singapore, Nov.,
17 Magnet Test Fall 2006 Field map, muon RECO, HCAL readout. Test synchronizing CMS subsystems scale 25 nsec Singapore, Nov.,
18 Cosmic Muon - Spectra Magnet test: alignment of the muon system. Movement in 3.8 T field tracked. Checked to be elastic. Extract charge ratio for cosmic rays. Singapore, Nov.,
19 Lowering HB Feb, 2007 Singapore, Nov.,
20 Lowering Magnet into the Collision Hall 2000 T heaviest crane load Singapore, Nov.,
21 Jan., Lowering of YE-1 January, 2008 the last heavy element of CMS is lowered into the Collision Hall. The silicon strip Tracker, the silicon Pixels and the endcap ECAL remain to be installed. Singapore, Nov.,
22 CMS: All Si Tracker Si Strip Module 75k chips using 0.25μm technology ~ 17,000 modules 200 m 2 of high purity silicon sensors 10 M electronic channels Detector CLK CCU Tx/Rx Tx/Rx T1 I2C Control module digital optical link TTCrx µp PLL Front End Controller APV Front End Module Optical transmitter TTCrx DCU 256:1 APV MUX ADC RAM Front End Driver analogue optical link FPGA FPGA Singapore, Nov.,
23 Tracker Insertion (Dec 07) 10,000,000 Channels 10x earlier detectors. Singapore, Nov.,
24 Beam-pipe Installed, May May Singapore, Nov.,
25 ECAL EE Summer 2008 ECAL has 70,000 crystals in total. Singapore, Nov.,
26 Barrel Pixels Aug The pixel system, 150 x 150 um, has 70,000,000 channels. Singapore, Nov.,
27 Final Closure Sept. 08 Singapore, Nov.,
28 Cosmic Ray Data in CMS Singapore, Nov.,
29 Muon Alignment with Cosmic Rays station 1 station 4 Singapore, Nov.,
30 Tracker Alignment with Cosmic Rays after alignment before alignment TIB Transverse impact point using cosmics to align tracker. Aim to have the Tracker pre- aligned using momentum analyzed cosmic ray muons. Singapore, Nov.,
31 HCAL Calibration Muons/Sources/Test Beam Initial Calorimeter calibration to ~ 5 % Singapore, Nov.,
32 Beam 1 1 st and 2 nd Turns Singapore, Nov.,
33 ATLAS, Beam Splash Sept. 10, 2008 Online display Singapore, Nov.,
34 Collimator Splash in CMS Dump 10 9 p of 0.45 TeV in collimator upstream of CMS. Get 1000 TeV muon energy deposits Singapore, Nov.,
35 Splash Energy in HCAL, ECAL Calorimeter energy deposits highly correlated Singapore, Nov.,
36 ECAL Timing with Spray Splash sends a plane of muons moving at a speed c sweeping across the detector. Can be used to set relative timing of detector elements. Singapore, Nov.,
37 Beam 2 RF Captured LHC injected beam in Sept., Beam r.f. phase tuned to capture circulating beam. Singapore, Nov.,
38 Beam Halo Events With beam 2 RF captured the events are much cleaner. Beam Halo muons due to upstream scraping. Singapore, Nov.,
39 Muon Bremm E in calor After the accident at the LHC, CMS have taken 300,000,000 cosmic ray muons. Significant number of events with E > 500 GeV muon bremmstrahlung in the calorimetry. Use these events to check tracking/muon/cal orimeter energy scales. Singapore, Nov.,
40 Software is Ready Muon RECO A. Kubik (Northwestern) Use the collimator splash to set timing. Use the halo muons to test the reconstruction software and extract the detection efficiency. Singapore, Nov.,
41 CMS Trigger and DAQ System Trigger Tables are Defined Trigger on minbias for LHC startup Data Quality and Trigger Monitoring are in place DAQ at ~ 50 khz has been stress tested Save 1 in 10,000,000 collisions to storage for further study Singapore, Nov.,
42 CMS Computing and Software The LHC Computing Grid Experiments will produce about 15 Million Gigabytes of data each year (about 20 million CDs) Tests done of data transfers from T1 -> T2 -> T3 in 2007 at full rate. The grid is ready. Singapore, Nov.,
43 T0 -> > T1 -> > T2 (US Example) T0 at CERN, T1 at Fermilab as US CMS national center, T2 at UCSD, Caltech, U Florida, Wisconsin, MIT, Nebraska and Purdue as regional US CMS centers. ( + Brazil +? ) Singapore, Nov.,
44 Remote Operations in CMS The LHC is a discovery machine so we must be ready on day one. Practice data transfer and data quality monitoring and remote data analysis using global runs. RO in many sites means more of CMS is engaged Singapore, Nov.,
45 Summary The CMS magnet, MB and HCAL were tested in the Surface Hall in 2006 After lowering into the Collision Hall all the CMS subsystems were aligned, calibrated and synchronized using cosmic rays. LHC beam was successfully used to set timings and confirm RECO algorithms. Data transfers and analysis models have been exercised We took 300 M cosmic ray events in Oct.-Nov. in preparation for the 2009 run. We are ready (and waiting) for multi-tev LHC collisions to begin to explore the Terascale and discover the new Physics. Singapore, Nov.,
46 Backup Slides Singapore, Nov.,
47 Muon Cosmic with Tracker Singapore, Nov.,
48 Magnet On Tracker - Muon Singapore, Nov.,
49 Strip Tracker - Cosmics Singapore, Nov.,
50 3-Muon Event in the CSC s Singapore, Nov.,
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