[Clas12_rich] RICH electronics- summary of space needed

[Matteo Turisini]

Hi Tyler,

thank you for the table, I attach a pdf with some comments.

Please note that VXS and Fiber distribution (11 + 4 U) is adequate for two RICH. 

About location:
We would prefer to have the fibers distribution box above the VXS crate.
If you have a 3D view of the rack and equipment that would be great to show details and optimize space but still allow for maintenance/access. (maybe fibers distribution can fit on the back of VXS saving 4U...)

At the moment we don’t know if one CAEN crate (power supply) will be enough for two sector,
we might consider to fill one rack with readout and gas control system and the other dedicated to (expandable) power supply crate(s).

Matteo

 



> Il giorno 26 lug 2016, alle ore 14:20, Serguei Boiarinov <boiarino at jlab.org> ha scritto:
> 
> Please do not install anything at the back of racks because we need an access to crates from the back to replace power supplies.
> Not sure about rack tops, it may violate safety or some other regulations. What about rack C3-4, it should be as good as C3-7 ...
> 
> ----- Original Message -----
> From: "Tyler Lemon" <tlemon at jlab.org <mailto:tlemon at jlab.org>>
> To: "Serguei Boiarinov" <boiarino at jlab.org <mailto:boiarino at jlab.org>>, "Eugene Pasyuk" <pasyuk at jlab.org <mailto:pasyuk at jlab.org>>, "Matteo Turisini" <matteo.turisini at gmail.com <mailto:matteo.turisini at gmail.com>>, "clas12 rich" <clas12_rich at jlab.org <mailto:clas12_rich at jlab.org>>
> Cc: "Patrizia Rossi" <rossi at jlab.org <mailto:rossi at jlab.org>>
> Sent: Tuesday, July 26, 2016 2:02:44 PM
> Subject: RICH electronics- summary of space needed
> 
> Hello, 
> 
> From my understanding, the following is all of the electronics components in rack C3-5 for the first RICH sector and their dimension: 
> 
> RICH 1 Components in Rack C3-5: 
> 
> 	Component 
> 	Height [U] 
> 
> 	VXS crate 
> 	11 
> 
> 	CAEN power supply 
> 	8 
> 
> 	HV distribution 
> 	5 
> 
> 	Fiber Distribution 
> 	4 
> 
> 	Empty space for ventilation 
> 	4 
> 
> 	TOTAL 
> 	32 
> 
> 
> 
> 
> 
> RICH 2 Components in Rack C3-7: 
> 	Component 
> 	Height [U] 
> 
> 	CAEN power supply 
> 	8 
> 
> 	HV distribution 
> 	5 
> 
> 	Fiber Distribution 
> 	4 
> 
> 	Empty space for ventilation 
> 	4 
> 
> 	TOTAL 
> 	21 
> 
> 
> 
> 
> 
> It looks like in rack C3-7, there will be the 21U for RICH 2's components. 
> 
> 
> However, it looks like it will be a lot tighter fit for the first RICH sector's electronics in rack C3-5 since there is only 23U available. Regarding this: 
> 
>    1. Would it be possible to drop the existing HV supply in C3-5 down a few U to make space? 
>    2. Matteo had mentioned that the Fiber distribution might be able go behind the VXS crate. Is this still a possibility? 
>    3. Would the CAEN HV mainframe be able to go on top in the rack so there is nothing on top of it and open to the air? 
> 
> 
> Considering these questions, it might still be possible to fit the components for RICH 1 in rack C3-5 with a little bit of rearranging of what is already there. 
> 
> Best regards, 
> 
> Tyler

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