[Clas12_rich] RICH electronics- summary of space needed

[Eugene Pasyuk]

That's fine. What is important for me ow nis the number of cables and fibers going to each panel. 
As I understand HV an LV cables are split evenly between the two panels but fibers go to only one. They go to the right side if I look along the beam. If RICH1 goes to sector 4 this panel will be on the bottom. Correct? 

-Eugene 

> From: "Matteo Turisini" <matteo.turisini at gmail.com>
> To: "Eugene Pasyuk" <pasyuk at jlab.org>
> Cc: "Tyler Lemon" <tlemon at jlab.org>, "Serguei Boiarinov" <boiarino at jlab.org>,
> "clas12 rich" <clas12_rich at jlab.org>, "Patrizia Rossi" <rossi at jlab.org>
> Sent: Tuesday, July 26, 2016 4:45:16 PM
> Subject: Re: RICH electronics- summary of space needed

> :-) no problem!

> Please consider the patch panel drawings are preliminary,
> their position is definitve, but the organization of the elements within each
> panel and between the panels can change.

> Thanks,

> Matteo

>> Il giorno 26 lug 2016, alle ore 16:41, Eugene Pasyuk < pasyuk at jlab.org > ha
>> scritto:

>> Oops! Ignore my message. They are 32 channels not 36.
>> Sorry.

>> -Eugene

>>> From: "Eugene Pasyuk" < pasyuk at jlab.org >
>>> To: "Tyler Lemon" < tlemon at jlab.org >
>>> Cc: "Serguei Boiarinov" < boiarino at jlab.org >, "Matteo Turisini" <
>>> matteo.turisini at gmail.com >, "clas12 rich" < clas12_rich at jlab.org >, "Patrizia
>>> Rossi" < rossi at jlab.org >
>>> Sent: Tuesday, July 26, 2016 4:39:34 PM
>>> Subject: Re: RICH electronics- summary of space needed

>>> I've just received from Valery the drawings of the patch panels.
>>> They have 72 HV connectors each. You are going to use A649 adapters which have
>>> 36 channels. So for each side of the detector you need two adapter boxes. All
>>> together you need 4 of them. In your layout you have 5 boxes. My question is:
>>> what is the purpose of the fifth one?

>>> -Eugene

>>>> From: "Eugene Pasyuk" < pasyuk at jlab.org >
>>>> To: "Tyler Lemon" < tlemon at jlab.org >
>>>> Cc: "Serguei Boiarinov" < boiarino at jlab.org >, "Matteo Turisini" <
>>>> matteo.turisini at gmail.com >, "clas12 rich" < clas12_rich at jlab.org >, "Patrizia
>>>> Rossi" < rossi at jlab.org >
>>>> Sent: Tuesday, July 26, 2016 2:53:34 PM
>>>> Subject: Re: RICH electronics- summary of space needed

>>>> Not quite.
>>>> There is no 32U available in C3-5. There is no reason to try squeezing
>>>> everything in one rack.
>>>> VXS crate and fiber distribution box will have to go to different rack. Either
>>>> C3-6 or may be on level 2. I am waiting for RICH box drawing to see the
>>>> location of the patch panels to find optimal routing for cables and fibers.
>>>> As Matteo pointed out in the last message 4U fiber distribution panel
>>>> accommodate 2 RICH detectors.
>>>> It also might be possible to mount HV distribution boxes vertically under
>>>> existing CAEN crates. We have some of our distribution boxes mounted that way.
>>>> Anyways, I don't see a problem with location of RICH1 CAEN crate and HV
>>>> distribution. If there is the second RICH and if one CEAN crate is not enough
>>>> we can put the second CAEN with distribution in C3-7.
>>>> We will find a place for VXS crate and fiber distribution box.
>>>> -Eugene

>>>>> From: "Tyler Lemon" < tlemon at jlab.org >
>>>>> To: "Serguei Boiarinov" < boiarino at jlab.org >, "Eugene Pasyuk" < pasyuk at jlab.org
>>>>> >, "Matteo Turisini" < matteo.turisini at gmail.com >, "clas12 rich" <
>>>>> clas12_rich at jlab.org >
>>>>> Cc: "Patrizia Rossi" < 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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