[Halld] Hall D: standby shifts extended to Wednesday 4pm

[Alexandre Deur]

Dear Collaborators,

The vacuum in the RF separator has improved enough overnight for the experts to try to run the cavity. They will start at 9am and watch for separator trips. If the separator behaves well until this afternoon, then there should be enough confidence that the RF-separator can be operated and that accelerator can go back to 4-hall operation. In that case, beam restoration to Hall D will start later in the afternoon. 
Consequently, the standby shifts are extended to this afternoon (Wednesday, 03/28), 4pm, with regular shifts starting at that point. 

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: "gluex-collaboration" <gluex-collaboration at jlab.org>, "halld" <halld at jlab.org>
> Sent: Tuesday, March 27, 2018 3:09:46 PM
> Subject: Hall D: standby shifts extended to Wednesday 9am

> Dear Collaborators,
> 
> The attempt to seal the vacuum leak in the RF separator does not seem to be too
> successful. This, together with a fire alarm in the south linac (still being
> investigated) is precluding reasonable chances to have beam in Hall D tonight.
> Consequently, the standby shifts are extended to Wednesday, 03/28, 9am
> (Tuesday, 03/27).
> 
> The hope is that the vacuum will improve enough tonight to enable the use of the
> separator. If it is not the case, there will a discussion at MCC tomorrow
> morning on what else can be done before deciding to take out the cavity for
> repair, which would signify an extended down time for Hall D.
> 
> 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: "gluex-collaboration" <gluex-collaboration at jlab.org>, "halld"
>> <halld at jlab.org>
>> Sent: Tuesday, March 27, 2018 10:32:45 AM
>> Subject: Hall D: standby shifts extended to 4pm
> 
>> Dear Collaborators,
>> 
>> There will be an access at 11am to try to seal the vacuum leak in the RF
>> separator. Regardless the outcome of the access, it is unlikely we will have
>> beam until the swing shift. Consequently, today's standby shifts are extended
>> to 4pm (Tuesday, 03/27). I will send an update regarding repairs and shifts
>> before 4pm today.
>> 
>> 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: "gluex-collaboration" <gluex-collaboration at jlab.org>, "halld"
>>> <halld at jlab.org>
>>> Sent: Tuesday, March 27, 2018 8:38:25 AM
>>> Subject: [Halld] Hall D shifts on standby until noon
>> 
>>> Dear Collaborators,
>>> 
>>> Due to the vacuum leak problem in the RF separator, there is little chance to
>>> see beam delivered to Hall D until noon (Today, Tuesday 03/27). Shifts are on
>>> standby until noon.
>>> 
>>> Accelerator is still discussing how to tackle the problem and should let us know
>>> of the plan sometime this morning.
>>> 
>>> Thank you,
>>> 
>>> Alexandre Deur, Hall D Run Coordinator.
>>> 
>>> RC cell: 757-383-5542
>>> Office Phone: 757-269-7526
>>> _______________________________________________
>>> Halld mailing list
>>> Halld at jlab.org
> > > https://mailman.jlab.org/mailman/listinfo/halld