# Presentation: 486183

**Installation Status**
**Opening Remarks**
**Overview, logistics**
**Recent events, status**
**Outlook, concerns**
**Conclusions**
**Jon Kotcher**
**Collaboration Meeting **
**October 11, 2000**

## Opening Remarks

**Installation/detector evolving very nicely**
**Huge progress on many fronts**
**Detectors delivered/mounted**
**Critical electrical & mechanical infrastructure installed – necessary ingredients**
**Cabling of all flavors (delicate, tricky)**
**Electronics (deliveries will remain problem)**
**Commissioning! (J. Yu)**
**Focus of hardware upgrade almost completely at DAB (SMT finishing up)**
**Tight organization, working well together**
**We are all indebted to **_**excellent**_** support staff**
**Buy them a cigar, cognac sometime...**
**Much left to do in time allotted**
**Some of it detailed work that can only go so quickly without unacceptable amount of risk**
**Not without concerns for March 1 startup**
**Will discuss later in talk**
**Two major “innovations” have opened up our ability to progress rapidly:**
**Split silicon into two halves**
**Put large pieces in place on final installation “runways” as early as possible**
**EF irons on platform, EMC trusses brought down to pit  **
**(Awaited delivery of CFT)**

## Since NIU Workshop

**Fiber Tracker installed Thu/Fri, June 29-30**
**Transport from Lab 3, light-tighting in Hi Bay, insertion into bore, transfer to final mounts**
**Went very smoothly **
**Used 2 days of the 2 wks we’d allotted**
**Surveyed into position**
**CFT well-centered on solenoid, axially and transversely**
**Solenoid ~ 5/8” south**
**Critical area, need clearance for CFT/CPS/CFT waveguides**
**Sophisticated “putty test” in inter-cryostat gap demonstrated ample space – quite definitive**
**Kudos to D0 Mechanical Group, CFT Group**
**Completion, installation represents major technical achievement **
**Starting gun for motion of large pieces back into position...**
**ECS on center beam Tues, July 11**
**Surveyed, repositioned, resurveyed, ...**
**Positioning constraints much tighter for Run 2 (beam pipe, silicon)**
**Some outstanding issues remain**
**Cryogenic hookup, recabling of ECS, beryllium beam pipe placed in CFT Barrel 1**
**Bubble wrap, PVC, foam, purge**

## Since NIU Workshop

**After ECS, platform moved west, end irons picked up, returned 8/4 (one week – faster than anticipated)**
**Trusses brought down immediately thereafter, completed 8/15**
**VLPC cryostats installed 8/7, commissioned 8/17**
**Working very reliably, without incident**
**Copper ground straps installed for electronic noise**
**Handful of production VLPC cassettes installed to do waveguide checkout **
**Data looks great – another important milestone**
**Waveguide installation ran into some snags**
**Spatial constraints btwn calorimeters at outer radius not properly accounted for**
**4:1 model made of entire face, incl silicon cable runs**
**Waveguide running on south face completed this week**
**A necessary prerequisite for SMT-S installation**
**Actually will be ahead of schedule**
**Detailed modeling demonstrated need for more room for waveguides/silicon cables & services**
**Two inner H-disks will be moved 1.75” away from interaction point**
**Waveguide checkout continues, much progress**
**Using kludged stereo boards for front end**

## Since NIU Workshop

**All Forward Muon detectors complete (Sep)**
**Congratulations Dmitri, et al.**
**Forward Muon A-layer pixels and MDTs mounted**
**Manipulation, alignment of large pieces – manpower, effort**
**Mounting of full A-layer major accomplishment **
**Has typically required iteration – a worry for completion of full system**
**Final articulating drawbridges not yet in place**
**C-layer north MDTs installed, being surveyed into position **
**Lead time for turnaround of survey information can be painful**
**C-layer north pixel plane assembled on shield wall**
**Quite impressive (go see it)**
**Being surveyed, then “hung” into place on truss after rear C-layer MDTs positioned **
**Expect north truss ready to roll in to Collision  Hall mid Oct, south truss mid Nov **
**Truss installation to Collision Hall begins Nov 13**
**Accelerator shutdown, warm up, low ******** retraction**
**System is progressing, but engineering is proving to be a significant bottleneck**
**4.5 months ain’t much time...**

## Since NIU Workshop

**Calorimeter electronics arriving**
**Almost 2 full quadrants of upgraded electronics available**
**Vendors an issue, as always**
**Purity of liquid argon in dewar 0.4 ppm**
******test cell, stand-alone test cryostat**
****** ****measurements being taken now**
**Ready to be used to fill cryostats**
**Thanks to G. Sajot & Co.!**
**Considering filling prior to roll in**
**Purity monitoring & thermometry (C. Zeitnitz, Mainz), HV, electronics **
**Manpower, amount of activity an issue**
**Will be discussed in Yu’s commissioning mtg this week**
**Beam loss monitors, radiation sensors, Run 1 luminosity counters installed in Collision Hall (NIKHEF, Brown, others)**
**Readout, feedback to accelerator **
**Silicon is doing very well**
**Cabling of SMT-S finishing at SiDet within next two weeks**
**Expect SMT-S installed early November, SMT-N around Xmas**
**Noise, error rates on 70k channels at 10% test looks quite good**
**Talks by Zdrazil, Lehner on Friday**

## Outlook, Concerns

**Hardware:**
**Both SMT half-barrels should be in before roll in**
**Won’t be necessary to do in Collision Hall**
**B-layer pixels are in jeopardy**
**Design of mounting hardware not quite complete**
**If late, will likely require roll out to complete (crane)**
**Would be a blow (detectors complete) - pushing very hard**
**Alignment, positioning accuracy of detector elements far more stringent for Run 2 **
**Beryllium beam pipe + bellows, silicon, calorimeters...**
**Difficult problem - much thought, survey**
**Amount of work in limited space, time**
**Arrival of electronics for tracking & other systems is very, very late**
**Interface cards for silicon:  start arriving mid-Nov**
**Adapter cards: partials Nov?**
**Power supplies for CFT AFE:  Feb 12 (partials?)**
**8-chip AFE boards for CFT: end Dec (RH), mid-Jan (LH)**
**3-4 in hand til then, no partials**
**12-chip AFE (stereo, preshowers):  Spring **
**Completion of CAL BLS motherboards:  mid-Feb**
**Level 2 trigger commissioned:  25 April**
**Alpha boards – smoke hasn’t settled here...**
**Vendors a canonical problem – much work focusing on expediting these orders, but...**
**Robust economy is not helping us**

## Outlook, Concerns

**Impossible to overstate delicacy of silicon hookup**
**Final connection of low mass cable must be made one and only one time**
**Full checkout upstream of adapter card prior to hookup of detector**
**Detectors damaged, fried with little effort – has been proven in the field by other exp’ts**
**Electronics will be trickling in**
**Dressing of inner cables very delicate, convoluted**
**Properly functioning interlocks an integral part of process (complex system)**
**Extreme care essential here**
**Parallel activities a worry**
**Locked gate at intercryostat gap!**
**Beginnings of commissioning team in place, needs coalescing**
**Si hookup will take a while – no corners can be cut **
**Need access to intercryostat gap, cathedral**
**Time allotted for detector commissioning time prior to roll in has all but disappeared**
**Replaced by electronics installation & hookup: **
**Being synched to accelerator downtimes for electronics installation & hookup in a system of this complexity will severely hamper our readiness for acquiring physics-quality data**
**Detector, front end, DAQ, online, trigger experts will be absolutely crucial**

## Conclusions

**D0 is doing extremely well, an excellent year for the hardware portion of upgrade**
**Si, CFT, Muon, Cal, infrastructure, online, commissioning**
**Systems are coming up, behaving as hoped in most cases**
**Serious, dedicated young people have been, and continue to be, instrumental in getting us there  **
**Much remaining to do, activity in hall escalating organically – OK for moment, but approaching saturation**
**Spatial/temporal constraints may mean some things cannot get done prior to roll in**
**Pressure rapidly mounting **
**Danger now is breaking something, hurting somebody **
**Taking appropriate care more important than speed! **

## Data Taking Position

**Clamshells closed, shielding mid-piece extended, EF & calorimeters closed**

## Calorimeter Access

**Retraction of shielding mid-piece & EF travel  allow access to region between calorimeters **
**FPS, ICD, LUM, SMT installation & cabling**
**CFT cabling on face of CC**
**Collision Hall access – servicing, repairs, etc. **

**EF travel only 42/47” for Run 2**

## Access to B/C layers

**Requires scaffolding supported off Collision Hall floor (not shown)**
**Small (~ 7”) footprint**