[Clas12_rich] EEL 124 layout for RICH assembly

[Stepan Stepanyan]

Walt and Marco,

We built and transported PCAL from 125. PCAL module was much heavier and 
geometrically
bigger object than RICH will be (I think!). We did not lift it to pass 
the obstacles. The cart that
PCAL was on had enough agility to pass through the fences. PCAL was 
lifted only at the door
to drive track underneath.
You should discuss this with engineers (Bob and others).

Stepan

On 8/29/16 11:36 AM, Walt Akers / JLAB wrote:
> Dear Marco:
>
> As you are aware, anything is possible...
>
> Having said that, undertaking that approach would need to be approved
> by the Hall B Management and then coordinated through the Target
> group because it would have a significant impact on their operations.
>
> If they are already planning to lift six Region 3 drift chambers to 
> circumvent
> the obstacles, then they are not likely to want to alter the building 
> configuration
> to facilitate the RICH detector.
>
> I'd recommend that you work this question through Patrizia and 
> Volker.  If
> they choose to take that approach, then I can work through the details to
> coordinate it.
>
> Walt
>
> Marco Mirazita wrote:
>> Dear Walt,
>> thank you for these information.
>> The doors are narrower than what we knew from the drawings we 
>> received some time ago, but still wide enough for the RICH.
>> However, I'm not much in favor of lifting the RICH to overcome the 
>> obstacles along the path to the exit from the building.
>> Is it possible to temporarily remove the fences to allow the passage 
>> of the RICH and then put them back in place?
>> Best regards,
>> Marco
>>
>>
>>
>> Il 2016-08-10 17:50 Walt Akers / JLAB ha scritto:
>>> Dear Marco:
>>>
>>> Please find attached the actually measurements for each of the doors
>>> along the path to the cleanroom. This was measured this morning and,
>>> as you can see, it varies significantly from the drawings that are
>>> provided by Facilities Management.
>>>
>>> Each door to the cleanroom is 16' 3" (4.95 meters), while the entry 
>>> into
>>> room EEL 125 is significant less at 15' (4.57 meters).
>>>
>>> Also, there is a major bottleneck in the path out of the facility 
>>> where the
>>> target group's fences are installed.  I am told (George Jacobs) that 
>>> this
>>> obstacle will be overcome by lifting the RICH detector over the fences
>>> and then lowering it into the open space in front of the door.
>>>
>>> In any even, getting through the doors to the cleanroom appears to be
>>> the least significant challenge - and we should be able to use the 
>>> front
>>> entry with no negative impact.
>>>
>>> Walt
>>>
>>> Marco Mirazita wrote:
>>>> Dear Walt,
>>>> thank you for your video, I would make few remarks on it.
>>>> - We will ship the RICH components dismounted and the detector 
>>>> assembly (including the supporting structure) will be done inside 
>>>> the clean room. You can see the assembly sequence as we have in 
>>>> mind at this moment here:
>>>> https://clasweb.jlab.org/wiki/images/5/58/RICH-ERR_mirazita.pdf
>>>> Thus, we should look at RICH we see moving inside the room after 
>>>> 4m40s of your video as the end of the story, when the RICH will 
>>>> move backward to go out of the room.
>>>> - For this reason, I don't see any problem with entering the 
>>>> material inside the room
>>>> - According to a drawing of the EEL124 we received, the second door 
>>>> is something more than 17 feet wide, i.e. more than 5m. It is 
>>>> enough for exiting the RICH. I don't know the width of the first 
>>>> door, please let us know if it is smaller than the second.
>>>> - Since the beginning of our discussion on the RICH assembly, we 
>>>> always thought our area would have been on the back of the clean 
>>>> room. Now in your video it seems that we should use the front of 
>>>> the room. I don't see any problem with this.
>>>>
>>>> Best regards,
>>>> Marco
>>>>
>>>>
>>>>
>>>> Il 2016-08-08 17:42 Walt Akers / JLAB ha scritto:
>>>>> So... just for clarification.  Is there a reason why entering through
>>>>> the backdoor of the cleanroom is preferred.  I only ask because using
>>>>> that entrance actually forces us to leave much space unused in the 
>>>>> front
>>>>> of EEL 125 in order to accommodate the movement of material in and
>>>>> out.  This would impact the overall usability of both rooms for more
>>>>> than 6 months.
>>>>>
>>>>> Thanks for the information,
>>>>>
>>>>> Walt
>>>>>
>>>>>
>>>>>
>>>>> Tyler Lemon wrote:
>>>>>> Dear Marco Contalbrigo and Marco Mirazita,
>>>>>>
>>>>>> We have looked at the video that Walt sent this weekend and have 
>>>>>> a few questions and comments. Attached is a screen shot of the 
>>>>>> final EEL 124 layout for reference.
>>>>>>
>>>>>> From Walt's video and schedule, we would have to wait until at 
>>>>>> least mid-January to begin RICH assembly because of SVT and 
>>>>>> MicroMegas movement. It would be nice if the Forward Tagger could 
>>>>>> move to a different area of EEL 125 (maybe the corner where the 
>>>>>> HPS equipment is) because this would free up the back roll-up 
>>>>>> door and allow the SVT and MicroMegas to enter the clean room 
>>>>>> through that door. This in turn would allow RICH to independently 
>>>>>> be assembled regardless of SVT and MicroMegas movements. For this 
>>>>>> to happen, could the HPS equipment move to a different location 
>>>>>> and could the Forward Tagger be moved to a different area of EEL 
>>>>>> 125? Amanda has contacted Marco Battaglieri regarding the Forward 
>>>>>> Tagger to see if it can be moved.
>>>>>>
>>>>>> Also just for information, the door that the assembled RICH would 
>>>>>> go through is 15.75 feet wide. Would this be adequate space for 
>>>>>> RICH to pass though?
>>>>>>
>>>>>> Best regards,
>>>>>> Tyler
>>>>>
>>>>>
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>
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