From: Flemming Videbaek (videbaek@sgs1.hirg.bnl.gov)
Date: Sun Oct 27 2002 - 14:22:13 EST
Dear collaborator,
This message addresses two issues
1.. Collaboration meeting.
2.. Planning for the upcoming d-Au and pp run.
Both of these have been addressed in a previous mailing to the institutional representative.
/ Collaboration meeting
Based on the suggested dates and responses I had gotten, the meeting will be held at BNL on December 6-9. This is over the weekend, to accommodate the request from traveling collaborators for such arrangement. I am aware this time does not fit everybody's schedule but I am certain we can have a productive meeting.
It also seems reasonable to plan for the subsequent collaboration to be held in Europe.
The agenda for the meeting will be in-depth presentations and discussions of data-analysis, status of publications, in addition to detailed run planning for the upcoming dA and pp run in 2002/03. Please forward to me items that your group can present at the meeting. I also hope we can present on behalf of people who cannot come to ensure that we cover as much as possible.
Hopefully some of the non-local collaborators will stay additional time to prepare for the upcoming run
(training, detector checkout, monitor software, shift and detector documentation).
As I already mentioned in a recent mailing PLEASE follow up on the procedures needed to get on-site at BNL during this meeting.
/run planning
The approximate schedule for the RHIC RUN-III and machine startup is approximately.
.Nov 1 Cool down starts
.Dec 1 d Au setup (deuterons a bit before)
.Dec 14 d Au beam + detector commissioning
.Jan 1 d Au physics starts I.e data taking, not detector setup.
.Mar 20 end dAu one week of background studies Au in Blue ring
.Mar 26 pp setup
.Apr 10 pp and detector commissioning
.Apr 28 pp physics run
.May 15 end of RHIC run-3
--
At the present time it is not known how quickly the machine will be able to deliver beams of a quality and intensity that allows for an effective physics program. The CA-D has given a conservative estimate of 2+3 weeks for setup and commissioning beam collisions (starting Nov 28). The main obstacles to reach a reasonable luminosity (~10% of nominal) are the first time injection of d into the rings and the switching between Au and d during loading of the RHIC rings. I would expect that the Au intensity very rapidly would be that of design value, as this was reached during last years run. At a ~10% d-Au luminosity much of the low pt program can be carried out effectively at both forward angles and mid-rapidity.
There is a general feeling that the 3 weeks allowed for beam and detector commissioning is set conservatively and this is clearly done by T.Roser since he got criticized last year for the way to optimistic predictions of beam availability and luminosity.
With this in mind I suggest we plan on regular scheduling with 7-24 shift coverage starting on or about Jan 2, 2003. Before this time though the commissioning of the detector will have to take place, i.e. turning detectors on, setup of trigger system and timing, and bring software up to date. Thus some people have to be present and work on these tasks, while other can work on software issues remotely. This startup date is assumed with a clear understanding that if stable conditions are reached before, the start day will move up, and if difficulties are large the start day will move later as necessary.
I have asked the institutions to supply the first lists of when people will be available under the assumptions of the above-mentioned schedule in order to solve the manning issue running the experiment.
Best regards
Flemming
------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory
tlf: 631-344-4106
fax 631-344-1334
e-mail: videbaek@bnl.gov
This archive was generated by hypermail 2.1.5 : Sun Oct 27 2002 - 14:27:45 EST