[Halld-cal] Final decisions on FCAL LEDs for monitoring

[Christina Kourkoumeli]

Dear Elton,
thanks a lot for the good news. We are happy we added up with a 
satisfactory soltion and we thank you and everybody in the calorimetry 
good for their support and patience. we will proceed the production 
ASAP.Depending on how fast it can be done you may want the first article 
to be shipped separately (soon).
Cheers,
Christine
On 13/3/2013 12:23 πμ, Elton Smith wrote:
> Dear Christina,
>
> At the Calorimeter Working Group meeting today Stratos showed the
> results of your measurements of the illumination of the FCAL LEDs. Based
> on the presentation and the discussion at the meeting, it is clear that
> the proposed configuration will meet our requirements for dynamic range
> and uniformity. We agreed that you should proceed with production.
>
> Thanks for all your hard work. Cheers, Elton.
>
> Elton Smith
> Jefferson Lab MS 12H5
> 12000 Jefferson Ave STE 16
> Newport News, VA 23606
> (757) 269-7625
> (757) 269-6331 fax
>
> On 2/26/13 1:48 PM, Elton Smith wrote:
>> Dear Christine,
>>
>> In order to have a record of our decision, I am sending this to the
>> halld-cal mail server.
>>
>> During the collaboration, we came to a consensus regarding which LEDs
>> to be included into the FCAL Quad LED boards:
>> - 1 violet @390 nm
>> - 1 blue @ 470 nm
>> - 2 green @574 nm (firing these in unison will allow for twice the
>> normal intensity)
>>
>> Christina and her team will confirm our expectations with the 2 green
>> LEDs firing at the same time and follow this plan if no problems are
>> found.
>>
>> The length of the cables from the quad LED boards to the controller
>> will be made 4 m long.
>>
>> Cheers, Elton.
>>
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