[Dsg-eic_tracker] EIC beam line test stand flow test

Thu May 4 12:43:07 EDT 2023

Hi Brian, Marc,

this does look much better. Is there any way we can get the inner beam pipe termperature
to 120C and redo the test, or are there practical constraints that we can not go above 100C?
It seems to me that if there is 1 mm of aerogel we may have a workable solution (assuming
that this extra material does not kill performance)?

Rolf

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From: Dsg-eic_tracker <dsg-eic_tracker-bounces at jlab.org> on behalf of Brian Eng via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>
Sent: Thursday, May 4, 2023 11:49 AM
To: Marc Mcmullen via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>; Amrit Yegneswaran <yeg at jlab.org>; Brian Eng <beng at jlab.org>
Cc: Patrizia Rossi <rossi at jlab.org>
Subject: Re: [Dsg-eic_tracker] EIC beam line test stand flow test

Attached is a summary table (as a PDF, wasn't sure best way to send this).

Some takeaways:
- We can get to the 100 C beam pipe temperature with this setup
- There's about a 20 C increase between the beampipe temperature vs silicon temperature
- However, taking into account that the beampipe started off 15 C warmer than the previous setup it isn't nearly as large and this 5 C differential is very similar to the Ansys simulation

End result we'd still lose about 15-20 C in the beampipe when there is enough flow (in the 1-2 m/s range) to get the silicon layer to ~30 C.

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From: Dsg-eic_tracker <dsg-eic_tracker-bounces at jlab.org> on behalf of Brian Eng via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>
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Cc: Patrizia Rossi <rossi at jlab.org>
Subject: Re: [Dsg-eic_tracker] EIC beam line test stand flow test

Quick and dirty plots from Excel, which is kind of a pain/slow to change plot settings with a file of this size.

I'll send a summary table shortly. On quick glance the beampipe temperature is maintained better with the aerogel than without it, but still maybe not good enough.

Marc,

Could you take another run and log from startup (room temp) to steady state then flow 10 and 25?

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From: Dsg-eic_tracker <dsg-eic_tracker-bounces at jlab.org> on behalf of Amrit Yegneswaran via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>
Sent: Thursday, May 4, 2023 10:33 AM
To: Marc Mcmullen via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>
Cc: Patrizia Rossi <rossi at jlab.org>
Subject: Re: [Dsg-eic_tracker] EIC beam line test stand flow test

marc,
make the plot from 1200 onwards i.e. for flow 150 -250 lpm
it appears that at these  flow rates the temperature of RTD C is around  27 C

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From: Dsg-eic_tracker <dsg-eic_tracker-bounces at jlab.org> on behalf of Marc Mcmullen via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>
Sent: Thursday, May 4, 2023 9:15 AM
To: Marc Mcmullen via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>
Cc: Patrizia Rossi <rossi at jlab.org>
Subject: [Dsg-eic_tracker] EIC beam line test stand flow test

Hi Patrizia and Rolf,

The flow tests are complete. The beam line pipe was heated to ~100C and air was flowed at 10, 20, 50, 100, 150, 200, and 250 liters per minute. Each flow test ran for 3 hours. After each test the controls waited for 3 hours to allow monitored temperatures to recover to approximately the same starting temperature for every test.

Sensor locations:

RTD_A, B, and C - inner surface of outer pipe (silicon)

RTD_D - outer surface of inner pipe (beryllium beam pipe)

RTD_H1, and H2 - outer surface of the heated pipe (for controls)

Brian,

The full data log is located at O:\DSG\EIC\Software\LabVIEW\Teststand_data\0502_0504_flowtest.xlsx<file:///O:\DSG\EIC\Software\LabVIEW\Teststand_data\0502_0504_flowtest.xlsx>

Regards,
Marc

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From: Dsg-eic_tracker <dsg-eic_tracker-bounces at jlab.org> on behalf of Brian Eng via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>
Sent: Thursday, May 4, 2023 11:49 AM
To: Marc Mcmullen via Dsg-eic_tracker <dsg-eic_tracker at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>; Amrit Yegneswaran <yeg at jlab.org>; Brian Eng <beng at jlab.org>
Cc: Patrizia Rossi <rossi at jlab.org>
Subject: Re: [Dsg-eic_tracker] EIC beam line test stand flow test