[Clas12_rich] RICH electronics- summary of space needed

Wed Jul 27 18:20:18 EDT 2016

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 <mailto: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 <mailto:matteo.turisini at gmail.com>>
>> To: "Eugene Pasyuk" <pasyuk at jlab.org <mailto:pasyuk at jlab.org>>
>> Cc: "Tyler Lemon" <tlemon at jlab.org <mailto:tlemon at jlab.org>>, "Serguei Boiarinov" <boiarino at jlab.org <mailto:boiarino at jlab.org>>, "clas12 rich" <clas12_rich at jlab.org <mailto:clas12_rich at jlab.org>>, "Patrizia Rossi" <rossi at jlab.org <mailto: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 <mailto: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 <mailto:pasyuk at jlab.org>>
>> To: "Tyler Lemon" <tlemon at jlab.org <mailto:tlemon at jlab.org>>
>> Cc: "Serguei Boiarinov" <boiarino at jlab.org <mailto:boiarino 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>>, "Patrizia Rossi" <rossi at jlab.org <mailto: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 <mailto:pasyuk at jlab.org>>
>> To: "Tyler Lemon" <tlemon at jlab.org <mailto:tlemon at jlab.org>>
>> Cc: "Serguei Boiarinov" <boiarino at jlab.org <mailto:boiarino 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>>, "Patrizia Rossi" <rossi at jlab.org <mailto: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 <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:
>> 
>> Would it be possible to drop the existing HV supply in C3-5 down a few U to make space?
>> Matteo had mentioned that the Fiber distribution might be able go behind the VXS crate. Is this still a possibility?
>> 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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