Dear All,
Since the meeting will be at 8:00 PM Geneva time I'll try to connect by
Skype from home (France) but may have limited bandwidth.
In case the connection is bad my LHC report is that vacuum leaks have been
found in 2 cold sectors which will necessitate a partial warmup. The note
from the DG is at this URL:
http://user.web.cern.ch/user/news/2009/090716.html
The bottom line is that the LHC will be closed up and ready for beam
around mid-November if no more problems are found. On that front the 80K
resistance measurements still have to be done on 3 sectors. If a high
resistance is found in the copper buss then the whole sector will have to
be warmed up to 300K. That would make for an even longer shutdown.
All indications are that the startup will be a long and difficult
campaign so such reports as this one are not unexpected.
Ellen and I just had a long weekend when we visited the battle fields of
Verdun and went inside the largest installation of the Maginot Line. I'm
trying hard to not associate the battle of attrition at Verdun in 1916 and
Maginot's strategy of 1940 with the LHC.
For those interested: http://en.wikipedia.org/wiki/Battle_of_Verdun
Best regards,
Frank
Frank E. Taylor
CERN MIT
ATLAS Collaboration Bldg. 26 - Rm 569
188-3-015 77 Mass. Ave.
Route de Meyrin 385, CH-1211 Geneva 23 Cambridge, MA 02139
Switzerland USA
Office: +41-22-767-6373 Office: 617-253-7249
FAX: +41-22-767-8350 FAX: 617-258-6923
CELL: 857-891-8579 (USA & Europe) CERN CELL +41 76 487 3563
email: [log in to unmask]
web: http://www2.lns.mit.edu/~fet/atlas_mit.html
On Wed, 15 Jul 2009, Ray F. Cowan wrote:
> Hi Everyone,
>
> This week we meet at **2 PM Eastern** on Thursday, July 16, for
> our weekly LQS meeting. Dial-in is 510-665-5437, passcode 7336.
>
> After round-table reports, we'll start our MIT review of BAD 2222, v6,
> on "Analysis of the decays tau --> Ks pi nu and tau --> Ks pi pi0 nu using
> the BaBar detector". The paper is a "physics note", which means it will
> be used by BaBar speakers preparing conference talks, but will not be
> published nor released to the public--so we only need to comment on the
> physics and not at all on the grammar or style.
>
> Our review is due July 22, so we'll start it this week and if needed
> finish up next week.
>
> The meeting website is:
> http://dmtpc.mit.edu/MaKaC/conferenceDisplay.py?confId=187
> The paper is available on the meeting page and is also attached.
>
> Hope you can join us.
>
> Thanks much,
> --Ray
>
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