[esa-t474] Things to do before running

[Alexey Lyapin]

Hi Yury,

Tuning the cavities before you leave would be very helpful. Hopefully we 
will manage to get the new cal boxes done before the run, so we will 
have to re-cable everything, so that's on us anyway.

We are planning to bring our source, so I guess we can use it for LO and 
get the cal tone signal from the MDL. The only uncertainty here is that 
the source is currently in repair, but it should be back soon. As for 
the SIS card, Stewart was going to send it to repair, but I don't think 
that happened yet. I can check on that tomorrow. In fact, we could 
profit borrowing some cards from Doug, he has quite a few of them, so we 
could probably even improve the resolution of 31,32,41,42 using 14-bit 
ADCs, but these cards are supposed to be shipped to Japan by end of May.

Let's talk about the details later today. We can decide in the end of 
the ESA meeting if we need to meet again for a separate T-474/480 
discussion.

Cheers,
Alex


Yury Kolomensky wrote:
>      Hi all,
> 
> I might be out of the country May 24-Jun 12 or at least Jun 7-12 (not 
> certain yet, but likely). We can tune cavities before I leave, and check 
> out the hardware (Johnny is actually doing the gain measurements right 
> now, so we know the channels with calibrator signals on (X and Q) are 
> functional). If you are bringing additional calibrator boxes, I'll have 
> to leave connecting and cabling to your able hands.
> 
> Two questions on the hardware. Can you bring an RF source ? The old HP 
> generator I've been using for LO has died, and I have no spare. Will 
> attempt to send it for repairs, and we can try 
> begging/borrowing/stealing from Doug et al, but it would be good to have 
> a dedicated source. Number two is about the broken SIS card, that I 
> think is back in the UK. Is there a chance to have it repaired ?
> 
> On Mar 28, 2008, at 9:29 AM, Alexey Lyapin wrote:
>> Hi Mark,
>>
>> You are quite right, this will be a tough run and will require quite 
>> some coordination. For that reason I think we should start joint 
>> T-474/T-480 meetings, possibly next week. Since we have a usual ESA 
>> Monday 8am/4pm meeting next week, maybe we can meet again at 
>> 9:30am/5:30pm as usual or just stretch the ESA meeting a bit?
>>
> 
> We have a standing 9:30 meeting this Monday, and bi-weekly thereafter. 
> Can change to weekly if needed.
> 
>> I guess the hardware crew will start a bit earlier, EU people arriving 
>> the weekend of June 7/8. Analysis guys should follow with a delay of a 
>> day or two. Then I suggest the following blocks:
>>
>> June  9-11: Hardware installation, NMR calibrations, initial checkouts
>> June 11-13: Commissioning, goal: all BPM channels working, reasonable 
>> resolution, all calibration signals fed in, new movers working etc
>> June 14-15: Stability runs for BPM studies
>> June 16-20: Collimator + Energy spectrometer runs
>> June 21-22: Energy spectrometer stability studies + Collimator studies
>>
> 
> Sounds like a reasonable plan. When do you guys actually arriving, and 
> what hardware do you plan to bring ? Since there will be beam in the ESA 
> for T-487, some initial commissioning can be done parasitically.
> 
> Let me comment on the lists:
> 
>> Cheers,
>> Alex
>>
>>
>>
>> Mark Slater wrote:
>>> Dear All,
>>> Before Easter, Bino, Nigel and myself had a get-together to discuss  
>>> the upcoming run. We came up with the following list of things that 
>>> need to be done beforehand to ensure we have good BPM resolution and 
>>> also some specific T480/T474 things. Please add/remove as you see 
>>> fit. Also, we will probably be quite short-staffed for this run and 
>>> so if anyone wants to volunteer to be in charge of a specific area, 
>>> do say so. I've 'volunteered' some people already so please confirm 
>>> if this is OK!
>>> Thanks,
>>> Mark
>>> General BPM Jobs
>>> ----------------
>>> Determine channel map (Yury?) Setup scripts for processing, Data 
>>> quality, Calibration (HH), Cal Tone (Bino very kindly said he will 
>>> set this up beforehand and I'll make sure it's all working 
>>> beforehand) Check Cal tone running (Alex?) Tune Cavities (Yury?) 
>>> Alignement Mover Systems (MikeW?)
>>> Interferometer (MikeH?)
> 
> I think the time order implied is backwards ? :) I.e. interferometer 
> checkout, mover alignment, cavity tuning, cal tone etc should be done 
> before the run. We'll form the channel maps ahead of time too.
> 
> 
>>> 1 Shift to determine:
>>>     Frequency Run  (Freqs, decays, t0s, Bandwidth)
>>>     Calibration
>>>     Resolution/Stability
>>>     Optimise Attenuation / Dynamic Range (maybe a bit optimistic)
>>>     
> 
> This is probably 2 shifts, if we will need accesses to change 
> attenuation, etc. I think to first order though we will leave all dipole 
> cavities with minimal attenuation (charge will be low), and so the only 
> attenuation to optimize would be on the Q cavities. That is pretty quick.
> 
> Yury
>