1. D0 Collab Mtg Feb 7, 2001 D0 Detector: Status for Run 2 Wistful reminiscences Near term: Roll in, detector status, next few weeks Latest from Beams Division Post-roll-in plan: Electronics status Access requirements, logistics Open/closed running Run, shift organization Closing comments Jon Kotcher D0 Collaboration Meeting February 7, 2001

2. D0 Collab Mtg Feb 7, 2001 What Did We Roll In?  Installed: u Central Muon:  A-  counters s Cosmic cap scintillation (trigger) counters s All PDTs refurbished, installed –Front ends available, being installed u Forward Muon: s Trusses & platform installed s All MDTs and pixels installed, aligned, surveyed s Forward shielding in place, exercised –Front ends being installed, prepped u Calorimeters: s Filled CC, ECN –In-situ thermometry, purity systems commissioned –<0.5 ppm, test dewar s 1-1.5 calorimeters instrumented for Mar 1 u End detectors (mounted on faces of end calorimeters): s Forward Preshower (FPS) –See CFT readout s Inter-Cryostat Detector (ICD) –Front ends being delivered s Luminosity Monitor (LUM) –Run 1 electronics until later in year

3. D0 Collab Mtg Feb 7, 2001 What Did We Roll In?  Installed (cont’d): u Bore of Central Calorimeter (CC) s Solenoid –Cooled down, powered, commissioned in DAB s Central Preshower (CPS) –See CFT readout s Central Fiber Tracker (CFT) –All CFT & CPS waveguides installed –60/100 production VLPC cassettes installed –Analog front end not yet out to vendor s Both halves of barrel silicon, all 4 H-disks –Front end in hand, being installed Interface region, high mass cables, adapter cards, etc. u Plus much infrastructure… s VLPC cryostats, VESDA, transformers, SMT water/power/interlocks, rack preparation, truss electrical, MDT/PDT gas, bus work, helium lines… u Detectors in varying stages of commissioning  Detector rolled in mechanically complete, huge amount of work… u Done on very contracted time scale, without killing anybody

4. D0 Collab Mtg Feb 7, 2001 Roll in and Beyond  Rolled in Thu/Fri, Jan 25/26  Week of Jan 29: u Position detector E-W (20 mils) u Exercise muon shielding, adjust truss elevation u Open end irons, CF iron u Install/cable BLMs u Open calorimeters, erect scaffolding u Install access/egress infrastructure u Resume SMT installation  Week of Feb 5: u Complete cabling over bridge u Begin shield wall assembly (air handlers, cable bridge, He U-tubes, etc.) u Test inner H-disks u Install outer H-disks u Connect cooling lines to silicon, extended testing prior to run u Begin cabling through EC winders  Week of Feb 12: u Install adjustable EC beam pipe supports u Survey & adjust tracker/EC positions u Continue SMT installation  Week of Feb 19 & 26: u Begin making up beam pipe couplings: position of large objects dictated by this activity u Close detector, final positioning of platform, align to TeV beam line  Mar 1: ready for beam

5. D0 Collab Mtg Feb 7, 2001 News From Beams Division  Helium lines in magnet string contaminated with water last week u ~ 5 dipoles, 2 quads u Replace, “not on critical path”  BDiv putting forth two scenarios: u Scenario I: s Close up Feb 27 or 28 s Mar 24: 1X8 stores for few days –Detector timing s Apr 09: 36X36 for one week s Apr 16: begin considering detector-driven accesses u Scenario II: s ~ same as I, but delayed by ~ 10 days  In either case, beginning of run dedicated to accelerator commissioning u Accesses driven solely by their needs  Complicates, competes with completion of our electronics installation

6. D0 Collab Mtg Feb 7, 2001 Readout Status on March 1  Forward Muon: u Readout installed, ramping up  Central Muon: u Expect full front end available for both scintillation counters and PDTs u Gas in place for Central & Forward (no circulation)  25%(?) of SMT hooked up, partially commissioned u Depends crucially on when run starts s If Mar 15, ~ 50% very feasible u All quadrants being prepped, installed  CFT/preshower readout: u Axial AFEs (AFE-8) arrive mid Apr s Required for both trigger & SVX (digitized) CFT/PS readout s Perhaps 5-10 prototype boards installed for Apr 1 (few % total) u Installation of AFE-8 production boards starts early May? u AFE-12 (preshower) late summer earliest  1-1.5 calorimeters instrumented u System coming together

7. D0 Collab Mtg Feb 7, 2001 Readout Status on March 1  Trigger (talk by Blazey): u Level 1: s L1 CAL: 2 trigger towers, more coming s L1 muon: 2 central octants, simplified triggers –Comb. production & pre-production cards s No L1 CFT –Possibly a few prototype boards mid Apr, hit- based trigger u No Level 2 s Progress being made, but not for Mar 1 s Difficult to predict availability u Level 3: s 8 Hz to start s 50 Hz mid Mar (end Mar) s 200 Hz end May (mid Jun) s 1 kHz end June (mid Jul) u Rely primarily on min bias trigger s LUM detector, electronics installed

8. D0 Collab Mtg Feb 7, 2001 D0 Access Needs After Mar 1  Two primary considerations: u Silicon installation, commissioning s Parts in hand, driven by us s Could use 2 months to advantage now if we had it u CFT/PS front ends s AFE-8 (CFT axial): final boards not yet ordered –Specs very rigorous (7 fC), electrical/cryo testing continues –Pushing to get this order out the door Feb 19 –Arrive mid Apr, start install early May –Other components (DFE, mixer) Mar arrival s AFE-12 (PS): earliest end summer u Remaining calorimeter electronics less of an issue; muon looks good  Access considerations for CFT/SMT very different u SMT: inter-cryostat gaps, CF cathedral u CFT: platform only u Trigger not an access issue (Counting House)  Time estimates for completion: u SMT: about 6-8 weeks u CFT: similar (?) u CFT/SMT installation don’t necessarily overlap in time

9. D0 Collab Mtg Feb 7, 2001 Current Post Roll-in Plan  Open vs. closed running: u Open: CF, muon shielding retracted, EFs open, end cals open, scaffolding in place s Offers immediate SMT access, but has limitations: –A-layer muon (rates), triggering, running solenoid requires CF closed, commission toroids, geometry of data set, etc. u Periodic closed-detector data sets beneficial  How much time will we really need to ask for? u Not clear accelerator will start on Mar 1 u Will there be 1 or 2 two-week periods without our having to ask for them? u Other, shorter accesses? s Productivity of brief accesses? - integrated time not only consideration u Closed-detector running: cost to close, reopen,…  D0 will begin run in closed configuration u Use every bit of remaining pre-beam time with detector open to allow SMT hookup s Close up as late as possible u Logic of making up beam pipe couplings  Start closed, watch accelerator progress u Open if/when it makes sense u Efficiently exploit short accelerator down times  Remain flexible in order to optimize available time

10. D0 Collab Mtg Feb 7, 2001 Getting Experiment Online, Running  Significant focus, effort will be required to get to physics quality data-taking u Will need well-organized shifts, efficient use of access time  Shift logistics, structure, evolution set by Kotcher, Yu, Begel u Day-to-day control room, shift operations run by Yu & Begel  Lead Experiment Operators (LEOs, or DAQ Experts, or…) u D. Alton, M. Begel, H. Fox, L. Groer, S. Mattingly, A. Nomerotski, T. Nunnemann, S. Snyder, J. Yu u Critical set of people – instrumental in getting us data u Need more: requires significant knowledge, expertise, training u On call 24 hrs to keep exp’t running  No formal requirement specifically for data- taking shifts u Part of overall shift-taking requirements s “Physicist shifts” u Hope we generate enough momentum without it u Sign up – it’s needed (Begel)

11. D0 Collab Mtg Feb 7, 2001 Shift Structure  Scaled-down 24-hour operation starting next week or two, shifts will gradually evolve into following: u Shift Captain s Implement shift run plan, use of luminosity s Coordinate control room, final decision-making authority s Some training required s Captains approved by Kotcher u DAQ Shifter s Run experiment (DAQ), keep it afloat s Less expertise than LEOs s Some training required u Detector Shifters s Representatives from major sub-systems: Si, CFT, CMU, FMU, etc. s Experts fewer in number, will be on call when not present s Training needed for less experienced u Global Monitor s Monitor data quality – EXAMINEs, event displays, etc. s Can be commuters, little or no training u Operations Shifter s Likely covered by technical FNAL support staff s Captain should be on top of this as well

12. D0 Collab Mtg Feb 7, 2001 Concluding Remarks  D0 rolled into Collision Hall mechanically complete u Hard work, dedication of talented support staff, physicists made it happen  Trigger & CFT/SMT readout systems are late, in various stages of evolution u Latter two make accesses an important concern, working on this  24 hour shifts beginning soon u Tending the experiment, making it work are critically important tasks u Need more dedicated personnel here  The next year be challenging, difficult at times u One year ago, hardware people would have laughed (and did!) at suggestion we’d roll in mechanically complete device in Jan ’01!