# Presentation: 092454

## 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)
- 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
- ...

## The detector is in the hall!

- Rolling in !!!

- Jan 25, 2001

- Jan 16, 2001

- Jan 26, 2001

- Rolled in

## 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).

## Schedule for the next two months

- Status:   Feb 5, 2001

- (may change)

- Goals:

- Establish  36x36 bunch operation by end of March
- Schedule during March under control of BD i.e. BD controls accesses

- Option I ( most likely)

- DØ needs of order 8 weeks of access time after March 1 to complete the detector in collision hall.

## Possible strategies to complete DØ in next few months

**Major and dramatic  choices (2)**

**1)Detector stays in collision hall**

**2)Detector rolls out of collision hall ****in next week or so**

- 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

**( either roll out ****now or never****)**

- 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

**We will explore this option**
**(No guarantee of success)**

## 20

- 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

**There are 22 days left to March 1, 2001**

**20**