[Pansophy] L2HE-CAV-HELV-LEAK-R1 new your okay to send for approval and processing

[Valerie Bookwalter]

Danny,

We are awaiting confirmation from you about the changes made to the traveler L2HE-CAV-HELV-LKCHK-R1 (to be renamed L2HE-CLNRM-HELV-LEAK-R1).
I have attached your and Adam/Gary versions of the traveler.

The differences are notated below:
Danny Version
Adam G / Gary C Version
Put a leak check bag around entire cavity and seal above 2 phase line explosion bonded joint.
Partially inflate bag with helium and stop flow.
Allow the leak detector the appropriate warmup time.
Start the Labview tracing program to collect the leak check data.
Do NOT use the zeroing feature on the leak detector during the helium vessel leak check.
The helium vessel shall be pumped long enough to have a MDL of less than 2E-9 mbar l/s. Pump time will vary depending on how long it takes for the sensitivity to be low enough.
Once the leak rate is indicated below 2e-9 mbar l/s the bag can be filled with helium. Start helium flow into the bag and stop the flow when the bag starts to inflate.
If any leak is indicated at all, the leak checked shall be considered to have failed.
Five minutes after filling the bag with helium, the calibrated leak shall be opened. Allow the trace to run long enough for the helium to settle to a flat line, indicating the leak rate of the calibrated leak.
Record the size of the leak with the calibrated leak open.
Record the size of the calibrated leak and the expiration date of the calibration.
Upload leak check data file and a saved picture of the trace with Cavity ID, total pressure, date, calibrated leak size, and time of helium spray indicated on the picture.
Toggle the yes/no button to indicate if the leak rate is acceptable.
Put a leak check bag around entire cavity and seal above 2 phase line explosion bonded joint.
Allow the leak detector the appropriate warmup time.
Start the Labview tracing program to collect the leak check data.
Do NOT use the zeroing feature on the leak detector during the helium vessel leak check.
The helium vessel shall be pumped long enough to have a MDL of less than 2E-9 mbar l/s. Pump time will vary depending on how long it takes for the sensitivity to be low enough.
Once the leak rate is indicated below 2e-9 mbar l/s flow helium into the bag and stop the flow when bag starts to inflate.
Any detectable leak shall constitute test failure.
Five minutes after filling the bag with helium, the calibrated leak shall be opened. Allow the trace to run long enough for the helium to settle to a flat line, indicating the leak rate of the calibrated leak.
Record the size of the leak with the calibrated leak open.
Record the size of the calibrated leak and the expiration date of the calibration.
Upload leak check data file and a saved picture of the trace with Cavity ID, total pressure, date, calibrated leak size, and time of helium spray indicated on the picture.
Toggle the yes/no button to indicate if the leak rate is acceptable.

If you accept the changes made by Adam/Gary, please let us know and we will send for approvals and process asap.
Thank you for your help.

Valerie Bookwalter
Jefferson Lab, SRF Department
Pansophy Team
1-757-269-5802 (OFFICE - currently working offsite)

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