[Dsg-ltcc] LTCC S5 Fill Status and Further leak check required (29 Jan 2015)

[George Jacobs]

LTCC S5 Fill Status - Almost there! 

LTCC S5 is currently filling. I have attached the pressure strip chart showing the 2 pressure transducer outputs. 

The blue line is the transducer located at the detector gas inlet, This is located at the lowest point of the detector volume. 

The brown line is the output of the pressure transducer connected to the pressure protection bubbler. (was the S4 transducer) 

8:30an 29 Jan 2018 - Detector looks like it is nearly full. Detector pressure at the bottom corner is 2.1"wc. Time to start reducing flow in order to determine a workable maintenance flow. This process will allow us to estimate how long the remaining gas will last. The scale shows 77kg remaining. 

George 



From: "George Jacobs" <jacobsg at jlab.org> 
To: dsg-ltcc at jlab.org, "Bob Miller" <rmiller at jlab.org>, "Doug Tilles" <tilles at jlab.org>, "Denny Insley" <dinsley at jlab.org>, "David Anderson" <dla at jlab.org>, "Morgan Cook" <mcookiv at jlab.org>, "Todd Ewing" <jtewing at jlab.org>, "Calvin Mealer" <mealer at jlab.org> 
Cc: "Amrit Yegneswaran" <yeg at jlab.org> 
Sent: Tuesday, January 23, 2018 11:46:52 AM 
Subject: LTCC S5 Fill Status and Further leak check required 

LTCC S5 C4F10 Fill Status 

LTCC S5 is currently filling. I have attached the pressure strip chart showing the 2 pressure transducer outputs. 

The blue line is the transducer located at the detector gas inlet, This is located at the lowest point of the detector volume. 

The brown line is the output of the pressure transducer connected to the pressure protection bubbler. (was the S4 transducer) 

9:30am 22 Jan 2018 - turned C4F10 flow on. 

11:20 am Spliced the pressure protection bubbler into the S5 Exhaust/Vent line 

1:40 pm Disconnected the pressure protection bubbler from the gas lines in order to reduce oil level to 2.5 inches 

2:15 pm Reconnected piping to pressure protection bubbler 

18:10 pm Pressure is limited by the Vent bubbler oil level. Fill continues, increasing the pressure at the gas inlet, blue line. Brown line indicated pressure at the protection bubbler is also increasing, but at a lesser rate, due to C4F10 carry over into the exhaust. 

This is a good start. 

Leak Check Required - Since I spliced in the S4 Bubbler and removed the bubbler piping in order to changed the oil levels in it, these connection should be leak checked ASAP. As can be seen on the pressure chart, detector pressure was very low when I reconnected the lines. Not enough pressure for a good leak check. An additional leak check should be performed using the sniffer, both at the bubbler connection splice Tee and the Bubbler piping connections. 

Thanks, 
George 


-- 
George Jacobs 
Physics Detector Support Group 
Jefferson Lab 
12000 Jefferson Ave. 
STE 12 
Newport News, VA 23606 

(office) 757-269-7115 

(cell) 757-876-0480 

(email) jacobsg at jlab.org 

(website) https://userweb.jlab.org/~jacobsg 


-- 
George Jacobs 
Physics Detector Support Group 
Jefferson Lab 
12000 Jefferson Ave. 
STE 12 
Newport News, VA 23606 

(office) 757-269-7115 

(cell) 757-876-0480 

(email) jacobsg at jlab.org 

(website) https://userweb.jlab.org/~jacobsg 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_ltcc/attachments/20180129/4a528352/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: LTCC-fill-status-29Jan2018.png
Type: image/png
Size: 63979 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_ltcc/attachments/20180129/4a528352/attachment-0002.png>