[Halld] shifts cancelled until Friday 12th, noon.

[Alexandre Deur]

Dear collaborators,

Accelerator group estimates that it will be done with replacing the arc 5 magnet by Friday afternoon. This is a good news for us considering the incident.

Shifts are now cancelled until Friday 12th, noon. 

I will send updates as the situation evolves.

Best regards,
 
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: Tuesday, February 9, 2016 8:44:55 AM
> Subject: [Halld] Today's shifts cancelled. Tomorrow shifts on standby

> Dear collaborators,
> 
> One magnet in arc 5 has partly burned this morning. Investigation is on-going
> and will be followed by repair. While accelerator can still deliver beam to
> Halls A and B, it cannot for Hall D. We do not know yet how long the repair
> will take but it will be at least more than a day. Depending on the findings,
> we may be back-up later this week or stay down for a significantly longer time.
> I will send an update once we know more.
> 
> Consequently, shifts are cancelled until tomorrow (Wednesday) noon. Next shifts
> are on standby until Thursday morning, 8am. (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).
> 
> So far, there has been little progress on our program due to several problems:
> the long beam tune associated with starting the beam after a long shut down,
> north linac down due to a cold box trip, Solenoid power supply trips and a
> tagger magnet trip. Essentially, we have not been able to start our program
> yet. However, accelerator did made good progress for us on nA BPM commissioning
> (theose work and the last task remaining is to calibrate them with the
> stripline BPM). Fast feedback commissioning is also progressing well.
> 
> Best regards,
> 
> Alexandre Deur, Hall D Run Coordinator.
> 
> RC cell: 757-383-5542
> Office Phone: 757-269-7526
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