[Clas12_rich] RICH electronics- summary of space needed

[Eugene Pasyuk]

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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