Presentation is loading. Please wait.

Presentation is loading. Please wait.

TPC Calibration with laser tracks B.S. Nielsen & G. Renault for the ALICE Collaboration Niels Bohr Institute.

Published byLuke Ryan Modified over 9 years ago

Similar presentations

Presentation on theme: "TPC Calibration with laser tracks B.S. Nielsen & G. Renault for the ALICE Collaboration Niels Bohr Institute."— Presentation transcript:

1 22-Nov-05renault@nbi.dk1 TPC Calibration with laser tracks B.S. Nielsen & G. Renault for the ALICE Collaboration Niels Bohr Institute

2 22-Nov-05renault@nbi.dk2 Installation work on laser system Installation work still to be done:  Mount laser optics on TPC endcaps  Build laser tent/hut in clean room  Install laser (Spectron from Copenhagen or new Ekspla)  Take care of operational safety  Align all laser optics with UV beam --- this could be time consuming How to run the laser in the clean room:  DCS should work, but it is also possible to adjust by hand  Laser free running (10 Hz) --- supply trigger like cosmics  Operate each TPC half separately --- may have a fair amount of some setup time to change

3 22-Nov-05renault@nbi.dk3 First steps at NBI What has been done?  My Aliroot installed (soon on the HEHI www)  Aliroot environment installed (Config.C)  First Simulation+Reconstruction chain done What needs to be done?  Simulate laser tracks in the TPC (in Aliroot)  Reconstruct laser tracks in the TPC  Extract drift velocity (Temperature gradient)  Study misalignment effects on reconstructed laser tracks Man power (NBI): Johann, Gaël, Børge

4 22-Nov-05renault@nbi.dk4 Back up

5 22-Nov-05renault@nbi.dk5 Why do we need laser tracks in the TPC? In order to align and calibrate the TPC with Straight tracks:  Correct distortions in the z-direction due to –Temperature gradient (drift velocity gradient measurement) –Mechanical misalignment (reconstructed straight tracks)  Take into account: –Distortion due to ExB effects (calibration) –Space-Charge in the drift volume (calibration)

6 22-Nov-05renault@nbi.dk6 Laser tracks principle  2  (2*4.66eV) impurity ionization  N 2 (trace), IP~5-8 eV  Ne,CO 2 (90/10), IP~10eV  Metal structures will emit photo-electrons y z x E B drift laser track

Download ppt "TPC Calibration with laser tracks B.S. Nielsen & G. Renault for the ALICE Collaboration Niels Bohr Institute."

Similar presentations

TPC meeting, Sardinia, 16-17 May 2004Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, Sardinia, 16-17 May 2004 Børge Svane Nielsen Niels Bohr.

TPC meeting, Sardinia, May 2004Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, Sardinia, May 2004 Børge Svane Nielsen Niels Bohr.
TPC meeting, CERN, 17-18 January 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, 17-18 January 2003 Børge Svane Nielsen Niels Bohr.

TPC meeting, CERN, January 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, January 2003 Børge Svane Nielsen Niels Bohr.
Technical Board, CERN, 14 May 2002Børge Svane Nielsen, NBI1 TPC Laser system  Functions of the system  Basics of the design  Design updates since February.

Technical Board, CERN, 14 May 2002Børge Svane Nielsen, NBI1 TPC Laser system  Functions of the system  Basics of the design  Design updates since February.
TPC meeting, CERN, 29-30 April 2002Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, 29-30 April 2002 B.S.Nielsen, J. Westergaard Niels.

TPC meeting, CERN, April 2002Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, April 2002 B.S.Nielsen, J. Westergaard Niels.
TPC meeting, GSI, 2-3 June 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, GSI, 2-3 June 2003 Børge Svane Nielsen, Jørn Westergaard Niels.

TPC meeting, GSI, 2-3 June 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, GSI, 2-3 June 2003 Børge Svane Nielsen, Jørn Westergaard Niels.
DCS meeting, CERN, 17 June 2002Børge Svane Nielsen, NBI1 Forward Detectors DCS Forward Detectors (FWD): T0- quartz Cherenkov V0 - plastic scintillator.

DCS meeting, CERN, 17 June 2002Børge Svane Nielsen, NBI1 Forward Detectors DCS Forward Detectors (FWD): T0- quartz Cherenkov V0 - plastic scintillator.
Technical Forum, 8 March 2007Børge Svane Nielsen, NBI1 Status of the FMD Børge Svane Nielsen Niels Bohr Institute FMD 1 FMD 3 FMD 2 Outer ring Inner ring.

Technical Forum, 8 March 2007Børge Svane Nielsen, NBI1 Status of the FMD Børge Svane Nielsen Niels Bohr Institute FMD 1 FMD 3 FMD 2 Outer ring Inner ring.
TPC meeting, NBI, 2-3 September 2002Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, Copenhagen, 2-3 September 2002 Børge Svane Nielsen, Jørn.

TPC meeting, NBI, 2-3 September 2002Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, Copenhagen, 2-3 September 2002 Børge Svane Nielsen, Jørn.
Technical Board, 18 September 2002Børge Svane Nielsen, NBI1 Laser rays on TPC mylar strips Technical Board, 18 September 2002 Børge Svane Nielsen and Jørn.

Technical Board, 18 September 2002Børge Svane Nielsen, NBI1 Laser rays on TPC mylar strips Technical Board, 18 September 2002 Børge Svane Nielsen and Jørn.
Laser Design Review, CERN, 27 Jan 2003Børge Svane Nielsen, NBI1 TPC Laser system  Functions of the system  Basics of the design  Construction tolerances.

Laser Design Review, CERN, 27 Jan 2003Børge Svane Nielsen, NBI1 TPC Laser system  Functions of the system  Basics of the design  Construction tolerances.
TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, 7-8 October 2003 Børge Svane Nielsen, Niels Lindegaard,

TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, 7-8 October 2003 Børge Svane Nielsen, Niels Lindegaard,
IV Convegno Nazionale Fisica ALICE, Palau, 28.09.2008 Andrea Dainese 1 Cosmics in ITS: tracking & alignment A.Dainese (INFN Legnaro) ITS alignment group:

IV Convegno Nazionale Fisica ALICE, Palau, Andrea Dainese 1 Cosmics in ITS: tracking & alignment A.Dainese (INFN Legnaro) ITS alignment group:
TPC status Marian Ivanov. Outlook TPC performance ExB correction Alignment Nonlinearities and edge effects Drift velocity calibration.

TPC status Marian Ivanov. Outlook TPC performance ExB correction Alignment Nonlinearities and edge effects Drift velocity calibration.
11/12 December 20061Borge S. Nielsen, NBI FMD contribution Second Installation and Commissioning Workshop DAQ and ECS FMD contribution Børge S. Nielsen,

11/12 December 20061Borge S. Nielsen, NBI FMD contribution Second Installation and Commissioning Workshop DAQ and ECS FMD contribution Børge S. Nielsen,
Diamond Radiator Development Brendan Pratt University of Connecticut GlueX Collaboration Meeting, Jefferson Lab, October 2011.

Diamond Radiator Development Brendan Pratt University of Connecticut GlueX Collaboration Meeting, Jefferson Lab, October 2011.
HLT & Calibration.

HLT & Calibration.
Dariusz Miskowiec, TRD status meeting Oct 20061 alignment... i.e. how to figure out where the detectors are, and how to use this knowledge in the reconstruction.

Dariusz Miskowiec, TRD status meeting Oct alignment... i.e. how to figure out where the detectors are, and how to use this knowledge in the reconstruction.
Christine KOURKOUMELIS University of Athens ATLAS Muon Chamber construction in Greece and alignment studies for H  ZZ  4μ decay Como, 8/10/03.

Christine KOURKOUMELIS University of Athens ATLAS Muon Chamber construction in Greece and alignment studies for H  ZZ  4μ decay Como, 8/10/03.
Prepare DORIS for particle physics again F.Brinker, DESY, March 31 st 2008 Injector chain to Doris and Petra Situation at the IP-region Beam optic Work.

Prepare DORIS for particle physics again F.Brinker, DESY, March 31 st 2008 Injector chain to Doris and Petra Situation at the IP-region Beam optic Work.
1 HLT – a source of calibration data One of the main tasks of HLT (especially in the first years) –Monitoring of the detector performance –Analysing calibration.

1 HLT – a source of calibration data One of the main tasks of HLT (especially in the first years) –Monitoring of the detector performance –Analysing calibration.

Similar presentations

Ads by Google