1 / 23

IFR-LST status report G. Cibinetto INFN Ferrara Babar Collaboration Meeting, Feb. 21, 2004

IFR-LST status report G. Cibinetto INFN Ferrara Babar Collaboration Meeting, Feb. 21, 2004. Milestones LST production status 1 st module assembled Princeton workshop Strips production Electronics High Voltage Software. LST Milestones successfully passed.

kirk-moon
Download Presentation

IFR-LST status report G. Cibinetto INFN Ferrara Babar Collaboration Meeting, Feb. 21, 2004

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. IFR-LST status reportG. CibinettoINFN FerraraBabar Collaboration Meeting, Feb. 21, 2004 • Milestones • LST production status • 1st module assembled • Princeton workshop • Strips production • Electronics • High Voltage • Software

  2. LST Milestones successfully passed • Dec 15 ’02 -- BaBar chooses LST for IFR Upgrade • June 12 ‘03 -- EPAC Review Approves LST Proposal • June 15 -- Cost/Schedule/WBS prepared • June 22 -- INFN Gruppo Uno Evaluation • June 27 -- BaBar IFC Approves Project • June 30 -- Large/Small Cell Decision • July 17 -- Electronics Design Review • Aug 1 -- Place Orders for Tubes & Small parts • Aug 26 -- Q/A Review • Aug 27 -- Install Test Module in BaBar • Sept 3 -- Fire safety approval for materials (tubes, strips, cables) • Oct 1 -- Decide to read out Phi via wire signals instead of strips • Oct 22 -- Mechanical, Schedule (Installation) & Budget Review • Nov 10 -- Tube Production begins! • Nov 30 -- Orders placed for components: electronics, crates, HV system, signal cables, HV cables • Dec 15 -- Phi Readout plane & Z-strip production begins at SLAC • Dec 18 -- First shipment (~5%) of tubes to Princeton/OSU • Jan 7 ’04 -- Q/C systems operational at OSU, Princeton • Jan 9 -- First module assembled at Princeton • Jan 14 -- First module passes Q/C tests • Feb 9 -- 168 “standard” tubes shipped to Princeton

  3. LST Remaining Milestones • Mar 1 -- 168 tubes (partially 7-cell and layer 18) shipped to Princeton -- Electronics tests begin --2% of modules shipped to SLAC • Mar 15 -- Q/C system operational at SLAC, Crate delivered • Apr 2 -- 320 Tubes shipped to Princeton -- Installation tooling complete • Apr 10 -- Electronics complete • Apr 15 -- Gas system assembled, under test at SLAC -- Electronics, crates, HV shipped to SLAC • Apr 30 -- 336 tubes shipped to Princeton • May 4 -- Installation Readiness Review • May 20 -- Ship all modules for 2 sextants to SLAC • May 25 -- Final 334 Tubes shipped to Princeton • May 27 -- Q/C begins at SLAC • Jul 31 -- LST module construction complete (6 sextants+spares) • Aug 1 -- RPC removal begins • Aug 15--Installation of 2 sextants begins • Oct 8 -- Installation of 2 sextants complete • Oct 15 -- Run 5 begins • Jul 2005 -- Install remaining 4 sextants

  4. LST production at Pol. Hi. Tech.

  5. LST production status LSTs in the conditioning station Operations in the clean room

  6. LST production status • Tubes production started at Pol. Hi. Tech. on Nov. 10 • Since mid. Decembre 15 tubes/day assembled • Up to now more than 500 LSTs assembled 24 before Xmas 168 on Feb. 9 8-cell tubes production for the 2 sextants to be installed in 2004 finished. Next Monday will begin the production of 7-cell tubes.

  7. LST production status • The Quality Control system is fully integrated with the production. • The system can handle the number of tubes produced daily by the factory. • Babarians work is fundamental for the diagnostic and the quality certification of the chambers. INFN provides 3 shifters + a production manager per week. • The QC system can identify systematic and random defects of the tubes. • The source scan test has been added to the standard QC procedure. So far ~30 tubes rejected by the QC system

  8. First 24 tubes arrive Jan 2 in Princeton All tubes survived the trip Test stand in operation in Hi-Bay area

  9. Performance of first 24 tubes – HV plateaus All 24 tubes show good plateau All tubes are still working properly

  10. First production module assembled Jan 9

  11. Princeton workshop – Jan 30/31 • Software • Task list • Planning • Organization • Installation logistics • Electronics • Electronics tests • Installation • Connections • Routing • Layer 18 • Module testing • High Voltage • Connector • Protection

  12. Installationmechanical summary and utilities • Inside steel • Backward end:z strip readout, HV connections • Forward: strip readout • Radial conduit • An “incremental conduit” is the plan for bringing the utilities out. With the incremental conduit a section of conduit goes in with every layer leaving the most available working space for succeeding layers • HV connector and cables (we have an expert, Dave Warner from Colorado State) • To avoid the entire length of the high voltage cable to be handled during installation. • They should be placed outside the detector in an area where the HV cables leave the conduit.

  13. Installationmechanical summary and utilities • Z-Strip Routing: • Placement of the readout lines of the z-strip was of major concern due to the limited space for the utilities. • We came up with a viable solution for the top and bottom sextants by attaching them to the sides of the center gap plate. • This solution is very space efficient but only works in the top and bottom sextant • The side sextant solution is under discussion. • Layer 18 • All the utilities must be accessed from the forward end because of the existing flux bars that seal this layer • The solution is to get the utilities organized in the gap so the flux bar could be replaced without crushing them • Since this layer is sealed by the flux bar extensive testing needs to be done prior to the replacement of the flux bar

  14. Installationmechanical summary and utilities Backward side utilities installation: transition board and HV connectors Sketch of the forward side with the space for the  strip readout

  15. Strip production @ SLAC

  16.  planes production status • 550 cables received. • Plane production is underway in End Station A • 2 shifters working at a time with production manager • 10 planes produced per bake cycle • May be able to do 2 cycles per day • 68 “2 by 8” planes produced so far • 50 planes shipped to Princeton • 24 “layer 18” planes also produced Flexible Flat Cable (FFC): 100 mils pitch

  17. z planes production status z planes production is postponed after the  plane for 2004 installation will be finished. • 3 "1 module wide" prototype planes produced • 1 installed in BaBar during last ROD • 1 to be shipped to Princeton • 1 to be used in tests at SLAC • For production planes the main issue is the cable length. • There are 216 different lengths of cables needed • We need to know/control the lengths to better than 1 cm • Current plan is • Buy bulk cable from Parlex • Cut to length here at SLAC • Send cables back to Parlex for etching • Send cables to Cable Connection for crimping

  18. Readout front end electronics Input Analog Daughter (IAD) card INFN -TO 12 prototypes ready and tested Order for full production placed Amount for 2004 installation ready by the end of march LST-FE card INFN -FE 3 prototypes ready and tested Order for full production placed . Amount for 2004 installation ready by the end of march

  19. Readout front end electronics test Prototype of mother board + IAD tested in Princeton on the first module prototype with  transition board for wire signals + and strip readout

  20. LST Crate, Crate Service Card and FSD Layout of the BaBar LST crate LST CRATE INFN -GE Material for 13 crates ordered Backplane and CSC/FSD board ready by the mid of march

  21. High Voltage 80 channels/box 1:4 Fan out (“per tube”) Up to 4 diff. voltages Current Monitor ZEUS over-current protection Canbus, Ethernet Interlocks Uses external HV supply Prototype under construction Production ready by mid April

  22. Software • reconstruction. • Revisit 1-D clustering (currently it can connect non-adiacent strips to deal with dead FECs) • Investigate possible effect of constant pitch • Teach the swimmer (KalmanFilter based) about the dead spaces. • efficiency monitoring. • Test current code on LST (each tube is smaller than an RPC) • software for cosmic runs • Reuse the code already available (IfrCosmic) • Useful to analyze cosmics in teststand and then to debug detector at the end of installation (first cosmic runs). • muonID algorithm • Revisit the current selectors • Study discriminant variables, feedback to reconstruction tweaking • Introduce  dependance in barrel.

  23. LST Summary • Success of first module validates construction and testing procedures. • Now in full Production at PHT. • 15 tubes per day • Q/C is able to keep up • Shipments scheduled • Assembly sites at Princeton and OSU in operation • Strip planes in production at SLAC • Installation, Electronics, HV, etc. under control and on schedule for summer installation of 2 sextants. • Major challenge: maintaining quality and schedule

More Related