[Halld] Update on the Fall 2015 run

[Elton Smith]

HI Alexandre,

I have looked at the HCO list and what still needs to be checked off:

start counter - detector
DAQ/trigger on  most systems
beam monitors - detector/control
PS - beam/detector
PS magnet

If you are responsible for one of these systems, please update the 
status. If you have any questions or issues with the process, let me know.

Cheers, Elton.

Elton Smith
Jefferson Lab MS 12H3
12000 Jefferson Ave STE 4
Newport News, VA 23606
(757)269-7625
(757)269-6331 fax

On 12/7/15 9:08 AM, Alexandre Deur wrote:
> Dear collaborators,
>
> There will be more delays for the start of the run in Hall D. The machine is doing well, on track for meeting in a few days an important milestone: 11 GeV, high-current, beam in Hall A (5 pass beam). However, at the moment, accelerator cannot do the 5.5 passes with high beam energy required to deliver 12 GeV to Hall D. The problem comes from a short in the choke of an ARC power supply, which makes the power supply not being able to function at full power. A new choke is being manufactured by the power supply company and should arrive at JLab at the end of the week or early next week. At the moment, accelerator is considering two possible options: wait for the replacement hardware and deliver 12 GeV to Hall D. This would happen early next week at the earliest; or lower the energy of the beam once the Hall A-11 GeV milestone is reached and deliver a beam of lower energy to halls A/D. The beam energy is not important for our Fall 15 run, but this option implies that the machine!
>    will need to spend time retuning the beam.
>
> For now, the consequence of all this for us is that all shifts are cancelled until Saturday morning, 8am.
>
> Thank you,
>   
> Alexandre Deur, Hall D Run Coordinator.
>   
> RC cell: 757-383-5542
> Office Phone: 757-269-7526
>
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