[Halld] Update

[Alexandre Deur]

Dear collaborators,

It is now clear that the CHL contamination clean-up and recovery will take a week. Then beam needs to be re-established. Consequently:

*Shifts are cancelled until Wednesday March 16th, 8am.
*Shifts are on standby until Thursday March 17th, 4pm.

If your shifts are on standby, please email Mark Ito (who will be the next RC) and Benedikt Zihlmann (the PDL) the phone numbers at which we can contact you in case the shifts are recalled.

Thank you,

Alexandre Deur, Hall D Run Coordinator.
 
RC cell: 757-383-5542
Office Phone: 757-269-7526

----- Original Message -----
> From: "Alexandre Deur" <deurpam at jlab.org>
> To: "halld" <halld at jlab.org>, "gluex-collaboration" <gluex-collaboration at jlab.org>
> Sent: Wednesday, March 9, 2016 4:23:06 PM
> Subject: Update and Shift standby

> Dear collaborators,
> 
> The beam will be down for some extended period of time: After the CHL trip on
> Saturday, there were signs of possible contamination in the CHL. Today at the
> 1:30pm MCC meeting, the question of whether one should do some preventive CHL
> maintenance was brought up. The duration could be one week. Soon after the
> meeting, the CHL tripped and it was, logically, decided to start right away the
> CHL maintenance. It is unclear how long this down time will last but it could
> be a week. We also do not know if the Spring Run will be extended after Apr.
> 13th to compensate for this possibly significant down time. It may be that the
> 3 days of down time next week for the Hall C commissioning will be
> cancelled/absorbed into the current down time. All these questions will be
> discussed in a meeting tomorrow. For now:
> 
> *Shift are on standby from today (Wednesday March 9th) to Monday, March 13th,
> 8am. Once we know decisions taken at the meeting tomorrow, we will see if the
> shifts can be cancelled or if the standby should be extended past March 13th.
> (Standby shifts means that the shift crew should be close to JLab and ready to
> come to shift on short notice. If your shifts are on standby, please email me
> and the PDL (Benedikt Zihlmann) the phone numbers at which we can contact you
> in case the shifts are recalled.)
> 
> *Since it unclear whether the Hall C commissioning will go on or not, the
> Standby shifts of March 14th, 15th, 16th and 17th are recalled for now.
> 
> *We are keeping the Hall D magnets on at nominal fields. To avoid incidents, the
> Hall will stay in Power Permit. If you need to access the Hall for a task other
> than the ones liste on the white board (
> https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:_Spring_2016_Run#Hall_D_white_board_.28current_run_plan.29
> ), please contact me. We will discuss the access at tomorrow's 8:45am RC
> meeting
> 
> *We will have a RC meeting tomorrow at 8:45am as usual.
> 
> I'll send an update about shifts status once we know more.
> 
> Thank you,
> 
> Alexandre Deur, Hall D Run Coordinator.
> 
> RC cell: 757-383-5542
> Office Phone: 757-269-7526