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Tracking Chambers for FNAL E906

Tracking Chambers for FNAL E906. Edward R. Kinney. University of Colorado, Boulder, USA. Tracking Chambers for FNAL E906. Overview of Tracking Plan Station 1 (MWPC) Station 2 and 3 (DC) Station 4 (Streamer Tubes) Funding/Construction Timeline. E866 Spectrometer. E906 Bend Plane View.

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Tracking Chambers for FNAL E906

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  1. Tracking Chambers for FNAL E906 Edward R. Kinney University of Colorado, Boulder, USA Tracking Chambers for FNAL E906 • Overview of Tracking Plan • Station 1 (MWPC) • Station 2 and 3 (DC) • Station 4 (Streamer Tubes) • Funding/Construction Timeline E866 Spectrometer DOE Review at ANL

  2. E906 Bend Plane View E906 Spectrometer Layout: Bend Plane View DOE Review at ANL

  3. E906 Non-bend View E906 Spectrometer Layout: Non-Bend Plane View DOE Review at ANL

  4. Station 1: New MWPCs Station 1: New MWPCs • Located just after M1 Magnet+Beam Dump+Hadron Absorber • High rates (up to 100 MHz) • Used for tracking back to target to eliminate tracks from dump/abs • Combined with Station 2 space points gives momentum determination • 6 planes (Y,Y’,U,U’,V,V’) of MWPC just after Station 1 Hodoscope • 94 cm x 137 cm size, 2 mm wire spacing, stereo angle of 14 • CF4/Isobutane (80:20) gas • 3 RF bucket time resolution • Readout using existing E871 preamp/disc/readout electronics • 5500 channels needed, 20000 available from E871 • Data out into (existing) coincidence registers DOE Review at ANL

  5. Station 2&3: Drift Chambers Stations 2 & 3: Drift Chambers • Station 2 located just after SM3 Magnet • Provides bend angle for momentum determination • Moderate Rates (up to 25 MHz) • Station 3 located just before start of Muon id absorber • Provides tracking information for pattern recognition and muon id • Low Rates (up to 5 MHz) • 6 planes (Y,Y’,U,U’,V,V’) each for Station 2 & 3 DCs • Station 2: 138 cm x 150 cm size, 10.2 mm wire spacing, stereo angle of 14 • Station 3: 203 cm x 162 cm size, 20.3 mm wire spacing, stereo angle of 14 • Argon/Ethane (50:50) gas • 250 micron resolution • Chambers from E605/E772/E866 used • Use existing preamp/disc/readout electronics (+ some new crates) • 1000+700 channels of multihit TDCs (LRS 3377 from the PREP pool) DOE Review at ANL

  6. Station 4: New Streamer Tubes Station 4: Streamer Tubes • 4 planes located just before first Muon ID absorber, 4 planes located at rear of all Muon ID absorber • Low rates (up to 10 MHz) • Combined with Station 3 space points and absorber gives Muon ID • 2 x 4 planes (Y,Y’, X, X’) hit information from streamer tubes • 250 cm x 250 cm size, 50.8 mm wire spacing • Use existing E866 streamer tubes with Ar/Ethane (50:50) gas • Run in proportional mode • Readout identical to MWPCs • 400 channels needed, existing E866 preamp/discriminators used • Data out into coincidence registers DOE Review at ANL

  7. Cost Breakdown I Cost Breakdown/Timeline I Station 1: MWPC • Base cost of new design, materials, part machining, assembly $140,000 • With 18% contingency, 0% overhead (capitalized)= $170,000 • Funding in FY2008 (likely “borrow” to allow design to start FY2007) • University of Colorado Nuclear Physics Group (ERK) • FNAL Wire winding facilities assumed + Colorado HEP tech (Erdos) • Existing chambers from other experiments being investigated Station 2 & 3: Drift Chambers • Existing E866 DCs refurbished by Rutgers University (R. Gilman) • With contingency, nominal cost of $4,000 per drift chamber • Funding in FY2009, Start Dec 2008 Station 4: Streamer Tubes • Existing E866 tubes refurbished by LANL/Rutgers University • With contingency, nominal cost of $7,000 • Funding in FY2009, Start Dec 2008 DOE Review at ANL

  8. Cost Breakdown II Cost Breakdown/Timeline II Station 1 Gas System: CF4/Isobutane (80:20) • Use Hermes RICH recirculating gas system (property of ANL) • FNAL will plumb/integrate with flammable gas safety system • Cost $3,000 in FY2009, Start Feb 2009 Station 2, 3 & 4: Argon/Ethane (50:50) • FNAL standard system • FNAL will plumb/integrate with flammable gas safety system • Cost $13,000 in FY2009, Start Nov 2008 All installations planned to be completed by June 2009 DOE Review at ANL

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