[Halld-cal] Installation of monitoring boards

[Christina Kourkoumeli]

Thank you,Elton.These are wonderful news!
Cheers,
Christine
On 7/3/2012 11:52 μμ, Elton Smith wrote:
> Dear Christine,
>
> The forty monitoring boards arrived yesterday. After gluing two 
> columns of light guides on the mini-Bcal and making all the wrappings, 
> we went ahead and attached one string of LEDs to the light guides. See 
> photos at
> https://halldweb1.jlab.org/wiki/index.php/Light_Guide_Information#Installation_of_Monitoring_Boards 
>
>
> After some debate, but anxious to move forward with the gluing 
> process, we installed the LED boards in the following way: A blob of 
> UV-curing glue was placed on the PCB board behind the LED. The LED was 
> then positioned on the edge of the hole away from the module. The glue 
> was cured shining the light through the end of the light guide. This 
> procedure should result in uniform behavior of all LEDs. The face if 
> the LED should be clean. The light is directed toward the module and 
> shines through the air inside the hole till it reaches the light 
> guide. We have not tried this, but my guess is that we should be able 
> to break off the board from the hole if we need to. Of course 
> replacing a board with the light guides in place would be a challenge.
>
> Since we did not have the controller board and you tested the LEDs 
> before shipment, we went ahead and installed them with out checking 
> them again. (Hope they all work).
> The additional length of the cable between the LEDs seemed excessive 
> at first, but we bent it around a small cylinder to avoid kinking it 
> and installation went very smoothly. In fact the additional length 
> helps plugging and unplugging the connectors. So the cable "pitch" and 
> stiffness of the cable may be just fine.
>
> Comments and feedback is welcome, but we plan to continue with gluing 
> light guides and installation of monitoring boards tomorrow.
>
> Cheers, Elton.
>