1 / 21

ATLAS Roman Pots: Commissioning and Operation

Detailed insights into the commissioning and operation of ATLAS Roman Pots at the CERN facility, including front-end electronics, scintillating fiber detectors, test beam results, and final unit designs.

jcathleen
Download Presentation

ATLAS Roman Pots: Commissioning and Operation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ATLAS Roman Potsstatus, commissioning and operation Beniamino Di Girolamo on behalf of the ATLAS Luminosity WG CERN Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  2. ATLAS Roman Pots locations LHC SPS ATLAS CERN RP RP RP RP 240m IP 240m RP RP RP RP Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  3. Roman Pot Front-End Elec. ATLAS Roman Pot Unit 24 MAPMTs Shielding Vacuum Flange Fiber Connectors 20 x 64 Fibers (Tracker) Overlap Fiber Detector LHC Beam Roman Pot Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  4. LHC beam Scintillating Fibre Tracker • Concept • 2 x 10 U planes • 2 x 10 V planes • 64 scintillating fibers • 0.5 mm2 square planes are horizontally staggered by multiples of 70.7 mm. Ceramic Substrate ~ 3 x 3 cm2 Positioning plate Fiber Connector Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  5. DESY Testbeam - November 2005 Detectors A set of different detectors was built to test: Light yield, Efficiency, Cross talk, Edge sensitivity, Resolution etc. Base line fiber: (SCSF-78, S-type) Kuraray 0.5mm2 single cladded Trig. S3 Si4 Trig. Si2 Si1 S1 x S2 • Beam • 6 GeV electrons • Beam spot ~ 1 cm2 • Setup • Si telescope (~30 mm resolution) • MAPMT – CAEN QDCs – PC 2x10x6 Detector Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  6. DESY Testbeam published results ALFA + Si-Tel. Si-Tel. Light yield: 4.5 p.e. Efficiency ~ 95% # Events Signal (ADC counts) Residual (mm) ALFA Resolution: sx,y ~ 36 mm Potentially increased by multiple scattering of the relatively low energy electrons Non-Active Edge Region << 100mm # Events ALFA (2x2x32) S330 Y (mm) Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  7. Final front-end electronics R/O FPGA MAROC R/O chip (64 x Amp. + Disc.) Adaptor Board 40 mm MAPMT HV Board Read Out System Mother Board 30 mm Read-Out Trigger (PMFs + MAPMTs) PMF (PM Front-End) Trigger Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  8. CERN Testbeam - October 2006 PMFs Mother Board 2x2x64 + Final Trig. Overlap Detectors • Detectors • Two ALFA trackers (larger wrt DESY TB) • Overlap Detectors • Beam • 230 GeV protons (p+/-) 2x10x16 • Setup • 5 x MAPMT – 5 x PMF - Motherboard – PC Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  9. CERN Testbeam very preliminary results ALFA Event (Reconstructed using 2 x half of ALFA) ALFA Active Area “Online” Results ! Offline analysis on going Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  10. Final ATLAS RP Unit • Derived from TOTEM design • Changes • No horizontal pot • Different mounting of Pot on flanges • Modified base and fixes to respect beam height and to allow easier extraction of bottom Pot Designer: J-M Lacroix (TS) Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  11. Mechanics status • Received pre-series Roman Pot Unit at CERN • Being assembled and soon tested by PH/DT1 team • Will be a fully operational Roman Pot Unit • Will be also used to setup the control system and to organize the cable routing and patch panels • Need of commissioning the movement precision • Verification of possible deformations under vacuum • Assessment of the achievable precision and reproducibility • Foreseen use in 2007 testbeam setup • We will start the final procurement after pre-series sign-off • 4 Roman Pot Units • Order: February-March 2007 Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  12. Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  13. Positioning: today and tomorrow Today “Tomorrow” Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  14. The two RP Units on one side Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  15. Pumping hole Top flange Brazing under test S.Mathot (TS-MME) Rectangular body out of center Overlap extrusions brazed on bottom Final Pot Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  16. Final Pot: extrusions for Overlap detectors Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  17. Top view of the detector in the pot Fiber detector Trigger scintillator (detector) Overlap detector Trigger scintillator (overlaps) Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  18. Scheduling • Roman Pot Units • 4 Units to be procured • After sign off on pre-series • Procurement of motors, screws, rails and misc. • Started • Currently foreseen delivery: Spring-Summer 2007 • Installation in May 2007 seems difficult, not yet impossible • We would only install the mechanics with either pots or covers in the main vacuum chamber. No movements, all blocked in safe position. • Otherwise waiting for next shutdown (2007/08) • Pot • First prototype being prepared • Will be tested under vacuum • One or two will be used for the future test beam • Simulation of RF compatibility ongoing and tests to be done • Final production in sync with Roman Pot Units production • All material procured Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  19. Scheduling • Cables in place, ancillary elements being procured • Patch panels being prepared • Movable vacuum equipment to be procured • Detector and electronics • Concepts proved to be suitable for our application • We are improving various details and we plan a testbeam in 2007 • Aiming for installation by shutdown 2008/09 Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  20. Commissioning (shutdown 2008/09) • Commissioning during shutdown • Movements and controls • Access procedures • Safety procedures • Vacuum system • Interlocks • Simulation of normal and alarm conditions Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

  21. Operations (2009 run) • If luminosity would allow with nominal optics • In park position • Detector commissioning with halo particles • Background studies • With high  optics • Approach to the beam • Detector commissioning (1st time) • Test on overlap detectors • Normal running Joint LHC Machine-Experiments Workshop on Very Forward Detectors - 25 January 2007 Beniamino Di Girolamo - CERN PH

More Related