[Brahms-l] Fw: SPY news update: Dec. 29, 2003 access (07:00 to 15:00), status, magnets ...

Dear All,

Progress report from the scheduling phycisist.
The main point is that is if RHIC op group make sufficient progress from now
until Monday the physics running will start
after the access next Monday.

I will send another e-mail regarding this access and run-startup later.

Flemming


----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Kin Yip" <kinyip@bnl.gov>
To: <kinyip@fnal.gov>
Sent: Friday, December 26, 2003 5:54 PM
Subject: SPY news update: Dec. 29, 2003 access (07:00 to 15:00), status,
magnets ...


> ====== Scheduling Physicist -YIP (ie. SPY) news channel ========
>
> (0) Thank you for all of you who have sent emails in the last few months
> to tell me how much you have enjoyed reading this series of emails !
> I can almost start a fans club :-)
>
> (1) Next Monday (Dec. 29, 2003), we will have the 8 hour access
> between 07:00 to 15:00.
>
> (2) Status (in my point of view):
>
> We have been making good progress and it looks more and more
> likely that we can start our physics production run next Monday
> after the above-mentioned access.     This will be about one week of
> the original schedule (~Jan. 5).   The only uncertainty now is whether
> we can finish commissioning the rebucketing procedure by the RF
> group before next Monday.  Rebucketing is needed so that the
> distribution of vertices (of collisions) will be significantly reduced to
> match the acceptance of various expts.   It's like ~+/- 30 cm for
> PHENIX.
>
> (3)  How much do you want to know about the Expt. magnets ?
>
> Not sure whether it's been like this every year ... It seems that there
> has been always some problems when we turned on the Expt.
> Magnets this year.
>
>   (3.1) X'mas eve:
>
>    After turning on the STAR magnets for an hour or so,
>    a STAR physicist in their control room told us that the magnet was
>    heating up and he had to turn it off to prevent magnet from
over-heating.
>
>   (3.2) Calling people in on X'mas eve/X'mas day or not ?
>
>   To make the long story short, after I went to the Main Control Room,
>    the obvious solution was to install the chiller as the water tower
cooling
>    system was not enough when the temperature/humidity was unusually
>    high.   But this included calling several people in from the Plant
Engineering
>    as well as from our Dept's pumping group.   At the end, people
collectively
>    decided that it was just too impractical to do so and we deferred it
until
>    today (Friday, Dec. 26, 2003).  The last sentence in my transparencies
of
>    the last Time Meeting above the X'mas picture was : "Please don't get
>    upset/pissed off if you are called in to fix a problem !"    After all,
I or we
>    avoided that by not calling them :-)
>
>    (3.3) The problem was due to a broken fan :
>
>     Today, all the experts are here and have found that the main problem
was
>     due to the fact that one of the two fans at the top of the tower was
broken.
>     This has been fixed and they've also turned on another pump (which
needed
>      fixing as well) to give it another boost.    The experts prefer to
use the water
>      tower cooling system rather than the chiller because the former is
much
>      simpler and is in principle less likely to break.   In the past, we
only turned on
>      the chiller in ~April/May.   Saving money is NOT the primary reason
(as some
>      people like me may have speculated).
>
>     (3.4) PHENIX magnet still tripped with 0 current
>
>      This afternoon, before turning on the STAR magnet, we ramped down the
>      new PHENIX Central Magnet (Inner Coil) --- CMI.  Nevertheless, we
have
>      found that this CMI still tripped on undervoltage with ~0 current.
This
>      hopefully will be fixed after the relevant engineer comes back next
week.
>
>
> (4) The usual Time meeting will be held on Dec. 30, 2003 at 13:30
> at the Snyder Room.
>
> ====== ======= ====== ======= ====== ======= ====== =======
>
> This SPY news channel solicits YOUR input of any sorts.
> You'll be paid back with loads of gratefulness :-)
>
> Let me know if you want to get out of this private email mailing list.
>
>
>


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