# Presentation: 214454

**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**

## What Did We Roll In?

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

## What Did We Roll In?

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

## Roll in and Beyond

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

## News From Beams Division

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

## Readout Status on March 1

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

## Readout Status on March 1

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

## D0 Access Needs After Mar 1 

**Two primary considerations:**
**Silicon installation, commissioning**
**Parts in hand, driven by us**
**Could use 2 months to advantage now if we had it **
**CFT/PS front ends**
**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 **
**AFE-12 (PS):  earliest end summer**
**Remaining calorimeter electronics less of an issue;  muon looks good**
**Access considerations for CFT/SMT very different**
**SMT:  inter-cryostat gaps, CF cathedral**
**CFT:  platform only**
**Trigger not an access issue (Counting House)**
**Time estimates for completion:**
**SMT:  about 6-8 weeks**
**CFT:  similar (?)**
**CFT/SMT installation don’t necessarily ****overlap in time**

## Current Post Roll-in Plan

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

## Getting Experiment Online, Running

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

## Shift Structure 

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

## Concluding Remarks

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