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Closing remarks

Closing remarks. John Womersley February 9, 2001. 2001 dates. Immense Progress. All detectors installed & in collision hall All SMT components here ( Interface card & power supplies last parts; complicated cooling& air handling system ready)

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Closing remarks

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  1. Closing remarks John Womersley February 9, 2001

  2. 2001 dates

  3. Immense Progress • All detectors installed & in collision hall • All SMT components here ( Interface card & power supplies last parts; complicated cooling& air handling system ready) • All waveguides (tracker, CPS) installed and checked out • VLPC system ready and tested (66 of 99 cassettes installed) • Big new forward muon system ready • Central muon reading out • Muon gas systems nearing completion • Calorimeters filled with pure Ar, HV on & read out • 24 hour shifts started in December • Exercise DAQ/online system; slow but steady rate • Training/learning to run the experiment • Online host system complete • Transferring data to FCC & unpacking raw data • Large speed up in track fitting & increase in efficiency • ...

  4. The detector is in the hall! Jan 16, 2001 Jan 25, 2001 Rolling in !!! Jan 26, 2001 Rolled in

  5. But we are not ready for physics • Fiber tracker readout incomplete • Hook up of SMT not complete • Trigger at L1, L2 & L3 not complete • We knew we wouldn’t be ready for physics on day one (Run I experience) • We all wish these areas were further ahead than they are, but run 2 is a seven year project. It is not a crisis that we are a few months late. • (A crisis would have been to roll in without the North half of the SMT, for example).

  6. Date Goal Comments Feb 28 Establish interlocks No access for DØ March 1 Tevatron cold; ready for beam Mar. 1-23 Proton only studies ~March 24-27 1x8 store Central orbit March 28-April 9 Establish 36x36 Helical Orbit April 9-16 36x36 stores >April 16 Stores & access Access to detector Summer One month shutdown Schedule for the next two months Status: Feb 5, 2001 (may change) • Establish 36x36 bunch operation by end of March • Schedule during March under control of BD i.e. BD controls accesses Goals: Option I ( most likely) DØ needs of order 8 weeks of access time after March 1 to complete the detector in collision hall.

  7. Possible strategies to complete DØ in next few months Major and dramatic choices (2) 1)Detector stays in collision hall We will explore this option (No guarantee of success) Options: 1A) follow Option I: no planned access until mid April, but some failures of BD before that  some access. Accesses after that unclear, ask for 50% 1B) request delay of machine startup until ~March 15, attempt 50% hook up of SMT by then. Then no access until end of April. 1C) follow Option I: no planned access until mid April, but some failures of BD before that. Request early start of shutdown ( 1mo) coupled to AFE delivery 2)Detector rolls out of collision hall in next week or so ( either roll out now or never) • Roll in when the AFE situation is very clear and within 4 weeks of completing. • DØ controls when work is done; no interference from BD. • Politically very bad given advertised March 1 start up. • Need ~ 4 weeks (beam down) to roll in. • Rolling in/out not without risks ( cable plant) • No exposure to beam for working systems & no learning experience until later • Earliest roll in: end of April

  8. 20 There are 22 days left to March 1, 2001 • Detector is the collision hall: on time and mechanically complete • It is a sign of our success that we are now thinking about the future • (and yes, this includes some worries) • Initial focus will be on the calorimeter and muon system • e.g. presentation by Tom Diehl at yesterday’s Run 2 Physics meeting outlining strategy for first muon and EM calibration datasets • Run 2 is starting! • Our remaining effort now is to turn DØ into a “physics machine” • — and this part is the fun part

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