[Dsg-rtpc] RTPC gas system

[kuhn]

Dear George et al.,

unfortunately I’ll be on travel for the next week or so, so I won’t be able to contribute much in the immediate future. I am intrigued by your statement about the pressure drop - this of course must be based on some assumption about what kind of gas line we use (inner diameter?) and how far the two devices (DMS and RTPC) are separated. I agree that 3 psi is a bit much, although in its present design, the DMS will be sturdy enough to withstand 3 psi overpressure, I think. In any case, we want it to be as close as possible to the actual RTPC, so perhaps 2-4 m away depending on where there is space on the electronics cart (and no magnetic stray fields).

- Sebastian

> On Feb 8, 2018, at 9:58 AM, George Jacobs <jacobsg at jlab.org> wrote:
> 
> Hi Sebastian,
> 
> I have sketched up what we spoke of at the meeting, DMS in series with the RTPC, and have attached the P&I diagram to this email.
> 
> This version will only work if the DMS can hold significant pressure. I estimate 2-3 psi for the gas to flow from the DMS through the RTPC due to the gas line length between the 2 components. 
> 
> I believe the only way the series configuration would work is if the DMS and RTPC are in tandem.
> 
> George
> 
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> George Jacobs
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