collaboration mtg cotober 11, 2000 installation status opening remarks overview, logistics recent...

DD

Collaboration MtgCotober 11, 2000

Installation Status

• Opening Remarks• Overview, logistics• Recent events, status• Outlook, concerns• Conclusions

Jon KotcherCollaboration Meeting

October 11, 2000

DD


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)

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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

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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

DD


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…

DD


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

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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

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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

DD


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!

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DD


Data Taking Position

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

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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

DD


Access to B/C layers

Requires scaffolding supported off Collision Hall floor (not shown)

Small (~ 7”) footprint

collaboration mtg cotober 11, 2000 installation status opening remarks overview, logistics recent...

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