[Brahms-l] Fw: SPY news update: 62.4 GeV physics run has started ... fates of NSRL/RHIC closely tied together

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


----- Original Message ----- 
From: "Kin Yip" <kinyip@bnl.gov>
To: "Kin Yip" <kinyip@bnl.gov>
Sent: Thursday, March 25, 2004 8:18 PM
Subject: SPY news update: 62.4 GeV physics run has started ... fates of
NSRL/RHIC closely tied together


>
> ====== Scheduling Physicist -YIP (ie. SPY) news channel ========
>
> I come back to the plain text mode.  As I have worried, some "loyal"
> readers with old mailer softwares did have problems with my graphics
> in my email.  Those graphics don't really add much value to my email :-)
>
> ************************************************************
>
> (1) Schedule
>
> Angelika Drees will temporarily take over as the scheduling
> physicist this Friday evening.   I'll be back on Apr. 5 to resume
> the duty of scheduling physicist.
>
> Let me repeat the concise schedule once again :
>
> --------------------------------------------------------------------------
--
> --------
> For RHIC :
>
> * NOW unti Apr. 2 at 08:00   =>   62.4 GeV Physics running
>
> * Apr. 2, 2004       at 08:00    =>   polarized-proton run starts
>   -- 1st 4 hours for snake high current test (unless they got a chance to
do
> it before)
>   -- During the 4 hours, though RHIC is off, AGS/Booster etc. will be
> running.
>
> * Apr. 5, 2004      at 08:00    => 3 day "Jet Target Installation" starts
>   Apr. 7, 2004       at 18:00    => This ends for most people except
perhaps
> the
>                                                       Jet Target group if
> they are not ready.
>
>  -- RHIC will be off during the 3 days.
>  -- 1st 8 hours on Apr. 5, AGS will be opened.  Otherwise, AGS will be
> closed for running.
>  -- Booster will be running (as NSRL needs it !)
> --------------------------------------------------------------------------
--
> ------
>
> NSRL is running all the time (mostly Mon. to Fri.) until Apr. 22.
>
> ************************************************************
>
> (2) 200 GeV gold run has ended and 62.4 run has started
>
> The 200 GeV gold-gold run ended at ~09:30 on Mar. 24.
>
> After ONLY a day plus a couple hours, the machine development
> for the 62.4 GeV has finished.  The 62.4 GeV physics run has
> started today (Mar. 25) ~14:00.  We had some minor delay on
> Wed.  before the machine development could actually start.
>
> I saw Angelika jump right in to do vernier scan in the first store
> for all 4 experiments.
>
> At the time of writing, there is some difficulty to deliver the
> 2nd physics store ... let's hope this will be over soon.
>
> ************************************************************
>
> (3) Fates of NSRL/RHIC closely tied together .....
>
> This past Tuesday (Mar. 23) has been the best day so far for NSRL (NASA)
> in the sense that they finished all the expts. before 21:30 --- breaking
> the midnight rule for the 1st time in this run.
>
> Independently of the above, unfortunately, on the same day, the last day
> for the 200 GeV energy gold-gold run didn't go very well. There was no
> real good store (say, longer than 20 minutes) after ~noon until almost
> 15 hours later, next day in the morning.
>
> In case you don't realize .... NSRL could run successfully on Tuesday
> because we were in the so-called PPM (pulse-to-pulse-modulation) mode.
> In this mode, one Tandem provided carbon beams (for example) for
> NSRL whereas the other Tandem provided the gold beams for RHIC.
>
> >From now until the lower energy gold-gold run ends on Apr. 2, the PPM
> mode is NOT feasible for the combination of gold and iron beams.
> The NSRL operation has to be stopped during the RHIC injection.
> If we were running iron beams on Tuesday without the PPM, NSRL
> would be probably waiting and waiting from 15 hours in vain
> as RHIC was doing injection essentially all the time.
>
> After RHIC injection finishes, we do a "mode-switch" (changing the
magnetic
> field and other parameters in the Tandem transfer line) and allow iron
> beams to be transferred from the Tandem to the Booster and to NSRL.
>
> Needless to say, the fates of RHIC and NSRL are closely tied together
> from now on until Apr. 2.     How good the NSRL run will be in the next
> ~7 days depends considerably on how smoothly RHIC works !!
>
> After Apr. 2, another kind of PPM mode (between a Tandem and the
> Linear Accelerator) will be used and NSRL can be run all the time
> even during RHIC injection.   Their "special bonding" will be broken.
>
> ************************************************************
>
> (4) As usual, the next Time meeting is next Tuesday (Mar. 30, 2004)
>     at 13:30 in the Snyder Seminar Room.
>
>     I am advertising this for Angelika.
>
> ====== ======= ====== ======= ====== ======= ====== =======
>
> 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.
>
> SPY's webpage :
>
> http://www.c-ad.bnl.gov/kinyip/SchedPhys/
>
> =================================================================
>
> Disclaimer: Whatever is being said here is not always 100% accurate
> though I try my best to avoid being 100% inaccurate :-)
>


_______________________________________________
Brahms-l mailing list
Brahms-l@lists.bnl.gov
http://lists.bnl.gov/mailman/listinfo/brahms-l