Limited Streamer Tubes for the IFR Barrel Installation Review SLAC, Oct 21, 2003 Stewart Smith INFN: Ferrara, Frascati, Genova, Padova, Roma, Torino US: Ohio State, Oregon Princeton, SLAC, UCSD

October 21, 2003Installation Review2 The LST Team M. Andreotti, D. Bettoni, R. Calabrese†, V. Carassiti, G. Cibinetto, A. Cotta Ramusino, E. Luppi, M. Negrini, L. Piemontese Ferrara University and INFN R. Baldini, A. Calcaterra, U. Denni, P. Patteri, A Zallo Laboratori Nazionali di Frascati dell’INFN R. Capra, M. Lo Vetere, S. Minatoli, S. Passaggio, C. Patrignani, E. Robutti Genova University and INFN Livermore National Laboratory C. Simani, D. Lange T. Allmendinger, K.K. Gan, K.Honscheid, H. Kagan, R. Kass, J.Morris, C. Rush, S.Smith, Q. Wong, M.Zoeller Ohio State University R. Frey, M. Lu, N. Sinev, D. Strom, J. Strube University of Oregon C. Fanin, M. Morandin, M. Posocco, M. Rotondo, R. Stroili, C. Voci Padova University and INFN J. Biesiada, G. Cavoto*, N. Danielson, R. Fernholz, Y. Lau, C. Lu, J. Olsen, W. Sands, A.J.S. Smith†, A. Telnov Princeton University S. Morganti, G Piredda, C. Voena Roma “La Sapienza”University and INFN D.B. MacFarlane, H.P. Paar University of California at San Diego R. Boyce, R. Convery, C. Hast, P. Kim, J. Krebs, R. Messner, M. Olson, R. Schindler, Z. Szalata, T. Weber, W. Wisniewski, C. Young Stanford Linear Accelerator Center Engineers † Contact persons * Also INFN Rome

October 21, 2003Installation Review3 Proposed Absorber Improvement Want to add as much absorber as possible, but we are highly constrained by earthquake considerations. Proposed configuration places more emphasis on muon ID, while still preserving most of the K L efficiency.  replace 6 active layers (5, 7, 9, 11, 13, 15) with 2.2 cm brass plates, compensating for the loss of layer 19 and bringing the total absorber thickness to about 5.3 int. This will be adequate for essentially all measurements.

October 21, 2003Installation Review4 IFR Barrel Performance: Pion fake rate vs  (  ) Simple muon selector -- uses only int info. (neural net algorithms improve rejection by factor ~2) Design June 2002 LSTs Only LSTs + Brass Muon Efficiency (Monte Carlo) p  > 2 Gev/C

October 21, 2003Installation Review5 LST design Single-layer large cell (15x17 mm) Readout of x and y coordinates from outside strips Graphite- Coated PVC

October 21, 2003Installation Review6 Module Assembly Plan Ohio State and Princeton preparing facilities for module assembly. Both universities fabricating parts for assembly fixtures. Shipping and testing boxes are being designed. Planning for testing and quality control is in progress. Installation procedures coordinated by SLAC and Princeton engineers.

October 21, 2003Installation Review7 Efficiency with cosmic ray trigger Efficiency limited to < 100% By geometry > 400 volt plateau Ternary [ZEUS] Gas, 8% Isobutane Full-scale prototype (Identical to “Test Tube” in BaBar)

October 21, 2003Installation Review8 Quality Control Absolutely crucial to get this right! Q/C procedures at Pol.Hi.Tech. (PHT)  Test equipment supplied by INFN has been accepted by PHT.  Tube acceptance criteria agreed upon – Stated in PO.  Procedures and equipment in place by end of October.  Q/C and long term test procedures at US sites has been designed. INFN/DoE/NSF student exchange program!  Two Princeton students will be at PHT from Oct 15 to Dec 15.  They will then travel west with the LST’s.

October 21, 2003Installation Review9 Milestones Dec 15 ’03 -- BaBar chooses LST for IFR Upgrade June EPAC Review Approves LST Proposal June Cost/Schedule/WBS prepared June INFN Gruppo Uno Evaluation June BaBar IFC Approves Project June Large/Small Cell Decision July Electronics Design Review Aug 1 -- Place Orders for Tubes Aug Review of Q/C plans August Install Test Module into BaBar Oct 1 -- Place all orders for “small parts” Oct 31 Place orders for components: electronics, crates, HV system, signal cables, HV cables Place orders for crates Nov 3 -- Production begins! Begin fabrication of shipping boxes Dec First shipment (~5%) of tubes to Princeton/OSU -- First Phi strips arrive in Princeton/OSU

October 21, 2003Installation Review10 Milestones (cont’d) Jan 10 ’04 Q/C systems operational at OSU, Princeton Feb 1 HV system shipped to Princeton March 1 Crates complete March 1 Electronics tests begin March 15 5% of modules shipped to SLAC March 15 Q/C system operational at SLAC Feb 15 1/3 of tubes, phi strips shipped to Princeton/OSU April 1 Electronics complete April 1 Production, Q/C complete at PHT April 1 Gas system assembled, under test at SLAC April 15 Electronics, crates, HV shipped to SLAC May 15 Ship Modules for 2 sextants to SLAC June 1 Q/C begins at SL:AC July 20 Modules for last 4 sextants assembled at OSU, Princeton July 31 LST system construction complete Aug 1 Installation of 2 sextants begins ~Oct 1 Installation of 2 sextants complete July 2005 Install remaining 4 sextants (ready earlier)

October 21, 2003Installation Review11 Milestones

October 21, 2003Installation Review12 Milestones (cont’d) Backup Slides

October 21, 2003Installation Review13 General Infrastructure for Q/C QC data and other relevant information collected by hand or, whenever possible, automatically with several DAQ stations. Common systems at PHT, Princeton, OSU, and SLAC. Labview will be used to write the DAQ software and design the interface. The DAQ stations will be operated by physicists on shift and/or PHT personnel. All DAQ stations will be on a wireless LAN. The DAQ station output will be simple text files. Local production database will be available on site. Data files will be transferred every day to an outside server to be imported in the official offsite LST database.

October 21, 2003Installation Review14 Summary R &D and Prototyping Complete – It works!  Aging and Rates  Noise  Mechanical Stability  Tolerances, Surface quality Test Tube operating successfully in BaBar Most orders placed, rest by end of month Production Starts in 2 Weeks Group is devoting huge effort and resources on Q/C  We have implemented tests to identify all known diseases.  These tests spotted many problems with prototypes. On schedule for Aug Installation

October 21, 2003Installation Review15 Backup Slides

October 21, 2003Installation Review16 Scope of Q/C Activities at PHT Barcode labelling Inspection of profiles  Mechanical  Graphite coating  Resistivity Measurement Inspection of jackets, endcaps, circuit cards Gas tightness (leak test) Wire check Wire-cathode distance measurement HV conditioning and plateau measurement Long range tests