[Hps-ecal] ECal Commissioning

[Marco Battaglieri]

Dear Raphael,
thanks to send out the first ideas about the ECal commissioning:
we are preparing a detailed ECal commissioning plan using the LED system.
Andrea will present the first draft next Monday at the Ecal meeting.

To optimize the job, it would be good to have similar plans for all the 
ECal commissioning subsystems/procedures identifying critical items, 
work-load, man-power needed, local technical support needed, local 
instrumentation ...
Here it is a (not complete) list of items/procedures we should think about:
- mechanical installation
- electric/electronic/cooling services
- slow controls
- DAQ
- Commissioning with LED
- Commissioning with Cosmic Rays
- (for future: Commissioning with beam)
We made this exercise  for CLAS12 commissioning and, even if we are 
aware of limits of any 'theoretical' procedures and early plannings, it 
is helping a lot in identify and  anticipate the necessary prerequisites 
for the real commissioning time. This should avoid, at least, trivial 
inefficiencies, giving time to prepare the test-bed well in advance 
(e.g. the LED commissioning does require the chiller installed and the 
slow controls working to thermalize LEDs and keep trace of the temperature).

We should also identify some key-people on-site that could act as a 
contact point between subsystem experts (usually off-site) and the other 
crew members: we may have subsystem experts developing procedures, 
testing them during the commissioning time and then producing an 
easy-to-use version for future 'standard' use with minimum requirement 
of expertize (as well as a reasonable documentation). The 
contact-people  could be the guinea pig to test them while the experts 
are still around interacting with them to solve and clarify possible issues.
This is not meant to replace experts but simply provide an easy transfer 
of the information for  standard operations and the probably 90% of 
possible (trivial) issues and problems. (It's implied experts will 
always be contactable by phone/videoconf providing their expertize for 
major problems).

Since we are well on schedule, it should not be a problem for each 
subgroup to produce the commissioning plan and discuss it at our 
Monday/Wednesday meetings.
Cheers
Marco, Andrea and Raffaella


Raphaël Dupré wrote:
> Hello Everyone,
>
> This is a reminder of what has been discussed during last meeting.
>
> The calorimeter support structure will be installed in the hall during
> the week of Sept. 29. The expert for this is E. Rindel, he already
> booked is plane and will be in JLab for the full week with Gabriel.
>
> Before that, in the coming weeks, JLab people will prepare the cabling
> for the ECal (HV, LV, LED system and signal), install the FADCs and the
> LED controller in the right crates, work on the rails parallelism and
> bring the ECal modules and the chiller in the alcove. It would also be
> good to have the scintillators for cosmics ready so they can be
> installed on the structure at the same time than the ECal.
>
> After that, from October 6 to 17 commissioning of the Calorimeter with
> LED system and cosmics will take place. People needed are a LED system
> expert and a DAQ expert so that we can have these things go forward
> rapidly. It would be good to confirm the presence and availability of
> experts at these dates. Marco, tell us when you know who can come and
> when. Stepan, it would be good to check that people from DAQ will be
> available these weeks.
>
> Best regards,
>