[Clas12_rich] RICH electronics- summary of space needed

[Eugene Pasyuk]

I made an estimate of the cable lengths for RICH in sector 4. Assuming CAEN power supply is on the 3rd level in C3-5 and VXS crate is on the 2nd level in C2-4. 
HV cables: ~15 m 
LV cables and fibers: ~17 m 
You amy add a meter or two just in case. 

-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: Wednesday, July 27, 2016 6:20:18 PM
> Subject: Re: RICH electronics- summary of space needed

> Dear Eugene,

> RICH1 goes to the sector 4, on the right side looking along the beam (see
> attached picture)

> The low voltage patch panel is the one on the bottom

> The optical fiber/HV patch panel is the one on the top

> It would be great to have a rough estimation of the maximum distance (LMAX)
> between the RICH1 crates and the RICH1 patch panels (both panels).

> About number of cables between rack and patch panels we have 138 RG58 for HV and
> 3 MTP-Trunks for the Optical fibers already defined, the number of LV cables
> will be between 25 and 35.

> This LV cables multiplicity depends on the optimization of the coupling between
> the CAEN2518 board and the RICH electronics (still in progress) and on the
> above lenght LMAX.

> Thanks,

> Matteo

>> Il giorno 27 lug 2016, alle ore 00:15, Matteo Turisini <
>> matteo.turisini at gmail.com > ha scritto:

>> Dear Eugene,

>> the definitive version is a simpler scheme that keeps fibers and all hv cables
>> on one patch panel and dedicates the other patch panel to the low voltage
>> distribution. I'll communicate to you all the required information as soon as
>> the revision will be completed, probably tomorrow afternoon.

>> Thanks,

>> Matteo

>> Il giorno 26 lug 2016, alle ore 16:53, Eugene Pasyuk < pasyuk at jlab.org > ha
>> scritto:

>>> 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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