Limited Streamer Tubes for the IFR Barrel

Limited Streamer Tubes for the IFR Barrel

Installation ReviewSLAC, Oct 21, 2003

Stewart Smith

INFN: Ferrara, Frascati, Genova, Padova, Roma, Torino

US: Ohio State, OregonPrinceton, SLAC, UCSD

October 21, 2003 Installation Review 2

The LST TeamM. Andreotti, D. Bettoni, R. Calabrese†, V. Carassiti,

G. Cibinetto, A. Cotta Ramusino, E. Luppi, M. Negrini, L. PiemonteseFerrara University and INFN

R. Baldini, A. Calcaterra, U. Denni, P. Patteri, A ZalloLaboratori Nazionali di Frascati dell’INFN

R. Capra, M. Lo Vetere, S. Minatoli, S. Passaggio, C. Patrignani, E. RobuttiGenova University and INFN

Livermore National LaboratoryC. 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 UniversityR. Frey, M. Lu, N. Sinev, D. Strom, J. Strube

University of OregonC. Fanin, M. Morandin, M. Posocco, M. Rotondo, R. Stroili, C. Voci

Padova University and INFNJ. Biesiada, G. Cavoto*, N. Danielson, R. Fernholz, Y. Lau, C. Lu, J. Olsen, W. Sands, A.J.S. Smith†, A. Telnov

Princeton UniversityS. Morganti , G Piredda, C. Voena

Roma “La Sapienza”University and INFND.B. MacFarlane, H.P. Paar

University of California at San DiegoR. Boyce , R. Convery, C. Hast, P. Kim, J. Krebs , R. Messner, M. Olson , R. Schindler,

Z. Szalata , T. Weber , W. Wisniewski, C. YoungStanford Linear Accelerator Center

Engineers † Contact persons* Also INFN Rome


IFR Barrel Performance: Pion fake rate vs ()

Simple muon selector -- uses only int info.

(neural net algorithms improve rejection by factor ~2)

DesignJune 2002 LSTs OnlyLSTs + Brass

Muon Efficiency (Monte Carlo)

p> 2 Gev/C


LST design

Single-layer large cell (15x17 mm) Readout of x and y coordinates from outside strips

Graphite-Coated

PVC


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.


Efficiency with cosmic ray trigger

0

10

20

30

40

50

60

70

80

90

100

4300 4400 4500 4600 4700 4800 4900 5000 5100 5200

Voltage (V)

Eff

icie

ncy

(%

)

Efficiency limited to < 100%By geometry

> 400 voltplateau

Ternary [ZEUS] Gas, 8% Isobutane

Full-scale prototype (Identical to “Test Tube” in BaBar)


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.


Milestones

Dec 15 ’03 -- BaBar chooses LST for IFR Upgrade June 12 -- 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 Aug 26 -- Review of Q/C plans August 27 -- 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 18 -- First shipment (~5%) of tubes to Princeton/OSU -- First Phi strips arrive in Princeton/OSU


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 1 5 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)


Milestones


Milestones (cont’d)

Backup Slides


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.


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 1 2004 Installation


Backup Slides


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

Limited Streamer Tubes for the IFR Barrel

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