Presentation is loading. Please wait.

Presentation is loading. Please wait.

The Ring Imaging Cherenkov Detectors of the LHCb Experiment

Published byDana Marsh Modified over 9 years ago

Similar presentations

Presentation on theme: "The Ring Imaging Cherenkov Detectors of the LHCb Experiment"— Presentation transcript:

1 The Ring Imaging Cherenkov Detectors of the LHCb Experiment
Franz Muheim University of Edinburgh On behalf of the LHCb RICH collaboration

2 Outline LHCb Experiment Ring Imaging Cherenkov Detectors
RICH Commissioning Preliminary Results with LHC Beam Data Outlook and Conclusions Cassis, France 3 – 7 May 2010

3 Crucial for LHCb physics programme
LHCb Experiment b-b angular correlation RICH2 Dipole magnet RICH1 VELO collision point mrad horizontal mrad vertical Crucial for LHCb physics programme optimised geometry and choice of luminosity Trigger efficient in hadronic & leptonic modes excellent tracking and Vertexing (m, ) excellent particle ID - RICH ~1 cm B

4 First LHCb Events at 7 TeV
30th March 2010 RICH2 RICH1 Cassis, France 3 – 7 May 2010

5 The RICH Radiators RICH1: RICH2:
Expected photon yields for isolated saturated particles A. Alves et al., JINST 3:S08005,2008. Silica Aerogel n=1.03 2 to 10 GeV/c C4F10 gas n=1.0014 Up to ~60 GeV/c CF4 gas n=1.0005 Up to ~100 GeV/c RICH1: 25250 mrad vertical 25 300 mrad horizontal RICH2: 15100 mrad vertical, 15 120 mrad horizontal Aerogel C4F10 CF4 6.7 30.3 21.9 Cassis, France 3 – 7 May 2010

6 Photon Detectors + Shielding
RICH1 and RICH2 Layout RICH1 RICH2 Flat mirrors Spherical Mirrors Photon Detectors + Shielding Central Tube Support Structure 7.2 m Cassis, France 3 – 7 May 2010

7 RICH Detectors - Pictures
RICH 2 Detector Support structure, entrance window, magnetic shielding RICH 1 Inside gas enclosure with Aerogel and planar mirrors RICH 1 Beryllium beampipe, VELO exit window and seal and planar mirrors Cassis, France 3 – 7 May 2010 RICH 1 Aerogel tile

8 LHCb Detector RICH2 RICH1 Cassis, France 3 – 7 May 2010

9 Hybrid Photon Detectors
Pixel HPDs developed in collaboration with industry (Photonis-DEP lead partner) Combines vacuum technology with silicon pixel readout - Quartz window with S20 photocathode nm wavelength Factor 5 20kV LHCb RICH HPDs total area of 3.3m2 with 2.5 x 2.5 mm2 granularity Readout Encapsulated 32x32 pixel silicon sensor Bump-bonded binary readout chip Operates at the LHC bunch crossing frequency (40MHz) RICH1 HPD Panel Pixel chip Cassis, France 3 – 7 May 2010

10 RICH Commissioning LHCb RICH detectors have been commissioned extensively starting in autumn 2007 Detector Control System and Monitoring Photon Detectors Properties Magnetic Distortion Monitoring System First Light Cosmic Rays Gas Systems See talk by Ross Young See poster by Funai Xing Cassis, France 3 – 7 May 2010

11 Experiment & Detector Control
RICH Operation fully automated 1 piquet shift High Voltage Status RICH Control Panel High Voltage over 24 hours Cassis, France 3 – 7 May 2010

12 RICH Commissioning RICH 1 and RICH 2 fully commissioned HPD properties
Level-0 and Level-1 Electronics Detector control & safety systems (DCS/ ECS) Monitoring HPD properties Monitored with laser light source Dark count rate, ion feedback ~18% of HPDs have developed large ion feedback 73 HPDs replaced now ~13 HPD replacements/year expected q RICH1 cont. wave laser light source See talk by Ross Young Cassis, France 3 – 7 May 2010

13 HPD Time Alignment Alignment methods Middle points
With laser light and beam data From 7 TeV data - Resolution ~ 1 ns See talk by Ross Young Middle points Lower, Middle, Upper points RICH1 RICH2 # of L0 board (2 HPDs) Cassis, France 3 – 7 May 2010

14 Magnetic Field Calibration
RICH1 Collimated LEDs on movable bar Retracted during collisions See poster by Funai Xing RICH1 fringe magnetic field after shielding ~14 G Cassis, France 3 – 7 May 2010

15 First Light – LHC beams LHC injection beam tests
in Aug/Sept 2008 Tracks passed through LHCb in “wrong” direction high density ~ 10/cm2 Cherenkov light in the HPD windows Used for time alignment RICH2 data from LHC beam

16 Cosmic Rays Trigger - Scintillator planes Low rate First RICH rings
2x2 m2, on Wall (VELO) and between RICH1 and TT Low rate A few cosmic rays/hour First RICH rings August 2009 Well isolated noisy pixels Ring radius [mm] Cassis, France 3 – 7 May 2010

17 Gas Systems RICH1 RICH2 Gas chromotography Gas chromotography
98% C4F10, 0.8% CO2, 1% N2, 0.2% O2 Monitoring with hydrostatic pressure difference top - bottom Gas chromotography CF4 98% N %, O %, Elapsed time (days) Date Cassis, France 3 – 7 May 2010

18 First Results with LHC Beams
Event Displays & Monitoring Angular Resolution, Mirror Alignment, Photon Yield Aerogel Performance Particle Identification Charmed and Strange Hadrons See talk by Chris Blanks See poster by Davide Perego See talk by Andrew Powell Cassis, France 3 – 7 May 2010

19 Event Display Nov/Dec 2009 LHC beams √s = 900 GeV RICH1 RICH2
LHCb data (preliminary) Kaon ring RICH 2 LHCb data (preliminary) Kaon ring Orange points  photon hits Continuous lines  expected distribution for each particle hypothesis Cassis, France 3 – 7 May 2010

20 Monitoring Since 30 March 2010 LHC beams at √s = 7 TeV RICH1 RICH2
# of hits # of hits Cassis, France 3 – 7 May 2010

21 Angular Resolution Mirror Alignment Spherical and planar mirrors
Well underway for gas radiators See talk by Chris Blanks RICH1 Gas RICH2 Gas MC expectation: 1.57 mrad MC expectation: 0.67 mrad Cassis, France 3 – 7 May 2010

22 Photon Yield Data from Nov/Dec 2009 LHC beams √s = 900 GeV RICH1 Gas
Data p > 15 GeV/c Data p > 5 GeV/c MC p > 5 GeV/c MC > 15 GeV/c Cassis, France 3 – 7 May 2010

23 Aerogel Radiator Geometry Properties Not sealed from gas volume
16 large tiles of silica aerogel 5 cm thick Properties Refractive index ~ 1.03 Excellent homogeneity Clarity C < 0.006 300 μm UV filter Not sealed from gas volume Changes due to C4F10 absorption Refractive index increased to 1.037 See poster by Davide Perego Photon yield and angular resolution Worse than expected Under investigation Cassis, France 3 – 7 May 2010

24 Particle Identification
See talk by Andrew Powell Φ  KK ? Without PID Reconstruction Maximises likelihood of particle identification (PID) hypothesis Selection Delta log likelihood between different hypotheses with PID Φ  KK ! Cassis, France 3 – 7 May 2010

25 Strange Hadrons at √s = 7 TeV
K*Kπ RICH PID Makes finding peaks easy ΞΛπ ΦKK Λpπ (without PID) Cassis, France 3 – 7 May 2010

26 Charmed Mesons at √s = 7 TeV
D0Kπ RICH PID Essential for D0 and D+ D*+D0π+, D0K+π- D+Kππ

27 Ds → ϕπ √s = 7 TeV data D(s)+ϕπ+, ϕKK RICH PID Exciting Outlook
Crucial for Ds Facilitated finding first B candidate B+ J\ψK+ Particle zoo is increasing each day: Λc, Ω-, ... PID performance results will appear soon Exciting Outlook After a few weeks of data taking, RICH is running very well and used to produce first results Looking forward to increasing data sets for physics analysis Without RICH With RICH Cassis, France 3 – 7 May 2010

28 RICH Upgrade Plans LHCb plans to upgade detector LHCb upgrade strategy
Following first data taking phase Expected at ~ 2016 Collaboration plans to submit Letter of Intent at end of 2010 LHCb upgrade strategy is running at 10 times desing luminosity, i.e. at ~ 2x1033 cm-2s-1 read out full experiment at 40 MHz, currently at 1 MHz → RICH photon detector needs to be replaced TORCH - Novel Detector concept Time-of-flight for p < 10 GeV Quartz plate with focusing system to correct for photon time-of-propagation in plate Requires time resolution of O(20 ps) See poster by Young Min Kim See talk by Mat Charles

29 Conclusions LHCb RICH detectors are fully commissioned
All systems are working Data taking with LHC beams has commenced Fully time aligned Magnetic field calibrated Mirror alignments well underway for RICH2 and RICH1 gas Aerogel performance under investigation Particle Identification performance studies have started RICH Detector Performance is excellent Rings have been observed immediately after switching on beams in a RICH detector at a hadron collider in the forward region Many strange and charm hadrons already observed Looking forward to analyse 2010/11 LHC data set R&D for LHCb upgrade has started Cassis, France 3 – 7 May 2010

30 Backup Slides Cassis, France 3 – 7 May 2010

31 The End F. Muheim

Download ppt "The Ring Imaging Cherenkov Detectors of the LHCb Experiment"

Similar presentations

USE OF GEANT4 FOR LHCB RICH SIMULATION S. Easo, RAL, 5-7-2001 LHCB AND ITS RICH DETECTORS. TESTBEAM DATA FOR LHCB-RICH. OVERVIEW OF GEANT4 SIMULATION.

USE OF GEANT4 FOR LHCB RICH SIMULATION S. Easo, RAL, LHCB AND ITS RICH DETECTORS. TESTBEAM DATA FOR LHCB-RICH. OVERVIEW OF GEANT4 SIMULATION.
27 th June 2008Johannes Albrecht, BEACH 2008 Johannes Albrecht Physikalisches Institut Universität Heidelberg on behalf of the LHCb Collaboration The LHCb.

27 th June 2008Johannes Albrecht, BEACH 2008 Johannes Albrecht Physikalisches Institut Universität Heidelberg on behalf of the LHCb Collaboration The LHCb.
Assisi – 23 June 2005 Tito Bellunato 1 Status of the LHCb RICH detector and the HPD Beauty 2005 Assisi – 23 June 2005 Tito Bellunato – Università degli.

Assisi – 23 June 2005 Tito Bellunato 1 Status of the LHCb RICH detector and the HPD Beauty 2005 Assisi – 23 June 2005 Tito Bellunato – Università degli.
Description of BTeV detector Jianchun Wang Syracuse University Representing The BTeV Collaboration DPF 2000 Aug 9 - 12, 2000 Columbus, Ohio.

Description of BTeV detector Jianchun Wang Syracuse University Representing The BTeV Collaboration DPF 2000 Aug , 2000 Columbus, Ohio.
Marco Musy INFN and University of Milano-Bicocca Pylos, June 2002 Aerogel as Cherenkov radiator for RICH detectors for RICH detectors.

Marco Musy INFN and University of Milano-Bicocca Pylos, June 2002 Aerogel as Cherenkov radiator for RICH detectors for RICH detectors.
The HERMES Dual-Radiator Ring Imaging Cerenkov Detector N.Akopov et al., Nucl. Instrum. Meth. A479 (2002) 511 Shibata Lab 11R50047 Jennifer Newsham YSEP.

The HERMES Dual-Radiator Ring Imaging Cerenkov Detector N.Akopov et al., Nucl. Instrum. Meth. A479 (2002) 511 Shibata Lab 11R50047 Jennifer Newsham YSEP.
Peter Križan, Ljubljana March 17, 2006 Super B Workshop, Frascati Peter Križan University of Ljubljana and J. Stefan Institute Aerogel RICH and TOP: summary.

Peter Križan, Ljubljana March 17, 2006 Super B Workshop, Frascati Peter Križan University of Ljubljana and J. Stefan Institute Aerogel RICH and TOP: summary.
Overview of LHCb RICH Detector Development On Behalf of LHCb-RICH Group RICH2004 Playa Del Carmen, Mexico December 4, 2004 S. Easo Rutherford-Appleton.

Overview of LHCb RICH Detector Development On Behalf of LHCb-RICH Group RICH2004 Playa Del Carmen, Mexico December 4, 2004 S. Easo Rutherford-Appleton.
Position Sensitive SiPMs for Ring Imaging Cherenkov Counters C.Woody BNL January 17, 2012.

Position Sensitive SiPMs for Ring Imaging Cherenkov Counters C.Woody BNL January 17, 2012.
1 Performance of the LHCb VELO Outline LHCb Detector and its performance in Run I LHCb Detector and its performance in Run I LHCb VELO LHCb VELO VELO performance.

1 Performance of the LHCb VELO Outline LHCb Detector and its performance in Run I LHCb Detector and its performance in Run I LHCb VELO LHCb VELO VELO performance.
May 31, 2008 SuperB PID sessionMarko Starič, Ljubljana Marko Starič J. Stefan Institute, Ljubljana Report on hardware tests and MC studies in Ljubljana.

May 31, 2008 SuperB PID sessionMarko Starič, Ljubljana Marko Starič J. Stefan Institute, Ljubljana Report on hardware tests and MC studies in Ljubljana.
RICH detectors for LHCb Tito Bellunato INFN Milano-Bicocca On behalf of the LHCb RICH collaboration 10th International Conference on Instrumentation for.

RICH detectors for LHCb Tito Bellunato INFN Milano-Bicocca On behalf of the LHCb RICH collaboration 10th International Conference on Instrumentation for.
Åsmund Skjæveland Magnetic Distortion of HPD Images.

Åsmund Skjæveland Magnetic Distortion of HPD Images.
Chris Parkes First results from the LHCb Vertex Locator Act 1: LHCb Intro. Act 2: Velo Design Act 3: Initial Performance for LHCb VELO groupVienna Conference.

Chris Parkes First results from the LHCb Vertex Locator Act 1: LHCb Intro. Act 2: Velo Design Act 3: Initial Performance for LHCb VELO groupVienna Conference.
HPD Performance in the RICH Detectors of the LHCb Young Min Kim University of Edinburgh IoP HEPP Conference – April 2009 1.

HPD Performance in the RICH Detectors of the LHCb Young Min Kim University of Edinburgh IoP HEPP Conference – April
A RICH with Aerogel for a hadron machine On behalf of the LHCb RICH group Some results and considerations on: Cerenkov angle resolution from aerogel Index.

A RICH with Aerogel for a hadron machine On behalf of the LHCb RICH group Some results and considerations on: Cerenkov angle resolution from aerogel Index.
Development of the RICH Detectors in LHCb S. Easo Rutherford-Appleton Laboratory June 5, 2002 RICH2002 PYLOS, GREECE For the LHCb-RICH Group.

Development of the RICH Detectors in LHCb S. Easo Rutherford-Appleton Laboratory June 5, 2002 RICH2002 PYLOS, GREECE For the LHCb-RICH Group.
The calibration and alignment of the LHCb RICH system Antonis Papanestis STFC - RAL for the LHCb Collaboration.

The calibration and alignment of the LHCb RICH system Antonis Papanestis STFC - RAL for the LHCb Collaboration.
Performance of the LHCb RICH detectors On behalf of the LHCb-RICH Collaboration Sajan Easo Rutherford-Appleton Laboratory IEEE-NSS: Dresden, Germany, 21-10-2008.

Performance of the LHCb RICH detectors On behalf of the LHCb-RICH Collaboration Sajan Easo Rutherford-Appleton Laboratory IEEE-NSS: Dresden, Germany,
TOP counter overview and issues K. Inami (Nagoya university) 2008/7/3-4 2 nd open meeting for proto-collaboration - Overview - Design - Performance - Prototype.

TOP counter overview and issues K. Inami (Nagoya university) 2008/7/3-4 2 nd open meeting for proto-collaboration - Overview - Design - Performance - Prototype.

Similar presentations

Ads by Google