[Solid_hgc] pressure info from Whit

[Zhiwen Zhao]

Dear All

During the recent SoLID meeting, Whit showed some calculation that even 
the pressure is not very high, the stored energy will make HGC a 
pressure vessel
see p10-p12
https://solid.jlab.org/DocDB/0000/000065/001/SoLID%20-%20Oct%202017%20-SEAY.pdf

Here I forward you information from Whit about the design guidance we 
have to follow.
I have put the same things into "pressure" folder in our dropbox.

Whit will be the person in charge of evaluating our design to make sure 
it satisfy with all rules.
When we are ready or have enough questions, we can ask him for a meeting.

Thanks

Zhiwen

-------- Forwarded Message --------
Subject: Re: SoLID HGC pressure question
Date: Fri, 20 Oct 2017 14:03:22 -0400 (EDT)
From: Whit Seay <wseay at jlab.org>
To: Zhiwen Zhao <zwzhao at jlab.org>

Zhiwen,

Attached is a thin window design guideline that will help with 
calculating stress in the window, determining clamping force required 
and information on how to design the fixtures the windows are mounted 
into.  This will be useful information to help prevent tearing of the 
window.  See part 7 of the supplement (link below) for allowable 
stresses for thin windows.


https://www.jlab.org/ehs/ehsmanual/manual/6151.html
Overview of the pressure system program

https://www.jlab.org/ehs/ehsmanual/Pressure%20and%20Vacuum%20Systems%20Supplement/index.html
This is the pressure system supplement - contains all sections of the 
program


https://www.jlab.org/ehs/ehsmanual/Pressure%20and%20Vacuum%20Systems%20Supplement/Part7-%20Vacuum%20Systems.pdf
even though we are not contending with vacuum, Part 7 is related to thin 
windows


This is the bulk of the guidelines and requirements.  We'll have to 
determine what category each detector falls within and then summarize 
the individual requirements that each detector group must meet.

Whit

----- Original Message -----
From: "Zhiwen Zhao" <zwzhao at jlab.org>
To: "Whit Seay" <wseay at jlab.org>
Sent: Friday, October 20, 2017 10:53:28 AM
Subject: Re: SoLID HGC pressure question

Awesome! thanks

Zhiwen

On 10/20/2017 10:08 AM, Whit Seay wrote:
> I knew there was something I was supposed to address this week and was forgetting.  I'll try to put together a few links and attachments today if I can find a few free minutes.  If not I'll do it Monday.  Remind me again if you do not have something by lunchtime on Monday!
> 
> Whit
> 
> ----- Original Message -----
> From: "Zhiwen Zhao" <zwzhao at jlab.org>
> To: "Whit Seay" <wseay at jlab.org>
> Sent: Friday, October 20, 2017 10:03:56 AM
> Subject: Re: SoLID HGC pressure question
> 
> Hi, Whit
> 
> Any update on this?
> We hope to know more so that the window and prototype design can move along.
> 
> Thanks
> 
> Zhiwen
> 
> On 10/16/2017 6:05 PM, Zhiwen Zhao wrote:
>> Dear Whit
>>
>> Sorry I had to go somewhere Friday after your talk and didn't get chance
>> to chat.
>> Thanks for looking into HGC pressure,
>>
>> As Garth is testing window and preparing building a prototype, we should
>> get familiar with all the needed regulations now to prevent any future
>> problem.
>> If you can point me to some links or email me some files, I can then
>> collect them to a central location share among us.
>>
>> When should we check with Dave about this?
>>
>> Thanks
>>
>> Zhiwen
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