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[Phys-l] [Fwd: Updates on the LHC situation] (fwd)



Hi all-
Here is an update, received today, on the LHC. The bottome line seems to be that the date for the first collisions has been set back to Juloy '09. This may be of interest to some membeers of the list.
Regards,
Jack


--
"Trust me. I have a lot of experience at this."
General Custer's unremembered message to his men,
just before leading them into the Little Big Horn Valley




---------- Forwarded message ----------

2008 07:09:04 +0100
Date: Wed, 26 Nov 2008 07:09:03 +0100
From: Peter Jenni <jenni@mail.cern.ch>
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Subject: Updates on the LHC situation
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Concerning: New information on the LHC schedule 2009
----------------------------------------------------

Dear Colleagues,

   A meeting took place on 25th November between CERN management, LHC
Project Management, and the experiments (represented by their Technical
Coordinators and Spokespersons). At this meeting the LHC status and the
current understanding of the schedule were discussed. CERN is preparing
an official presentation to CERN Council in December. In the summary
below is today's best 'working schedule', and which is still subject to
changes that could be made in the coming weeks before Council. The main
points covered at the meeting are (copied in part from the summary of
the meeting):

- A lot of progress has been made in developing diagnostic procedures
(calorimetry) and tools to make sure that no other bad splices are
'hidden' in the machine.
- Moving out of magnets affected by the incident has started. It is
foreseen to remove 39 dipoles, including 6 (3 at each side) in a
buffer zone. These magnets should not be affected but will be re-
tested just to confirm that the limits of the affected region are
understood. 14 SSS quadrupoles will also be moved out.
- All magnets to be brought to the surface should be out before
the Christmas shutdown. By then 20 dipoles should already be back
in the machine. The plan is to install the first dipole (from the
set of spares) already this week.
- The test bench (for cold testing) is a limiting factor. Capacity to
be ramped up after connection of 18 kW plant (now 6 kW) in February
2009.
- Last magnet should be back in end of March 2009; whole machine cold
again beginning of July. This means optimistically: first beam in
the machine end of July.
- Many activities are going on in parallel in the tunnel, but are not
(and should not come) on the critical path (work on flanges, relief
valves, cabling).
- Point of concern of experiments: access conditions in experimental
caverns and service caverns. Is being looked into by/with Safety
Commission (SC).

Note that the machine status and plans will be presented on Monday
morning in the ATLAS Week Plenary by Roberto Saban (TS/ICC).

Kind regards,

Marzio Nessi and Peter Jenni


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