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["Tribedy, Prithwish" <ptribedy AT bnl.gov>]

Hello everyone, 

We have good news to share with you. With a new kind of tube that was previously used by Phenix, we might have a solution to our leak problem. We need to do more tests, but I think this is a good progress. 

Remember we had the following issues:  

1. The hard tubes were very stiff, bending radius was large but had less leak. 
2. The soft tubes had major leaks between layers. 

A solution came after Bob/Rahul contacted Robert Pisani from Phenix. From them we got this third type: Tygon 2001 plasticizer free" tubes.  

With our pressurized air setup, we see NO LEAKS. No more bubbles with soap. 

Also, it's much cheaper. It costs like $2.5 c per ft (compared to $20-80 for the previous soft tube we were using). 

According to PHENIX experts, they should be replaced once every year -- I think that is feasible. 

So, we'll get 25 ft of these tubes tomorrow and this way we have the full weekend to do the testing.  

If things look good in next couple of days and no leaks are found‚ WE MIGHT HAVE A SOLUTION.  

We will keep you updated. 

Best,

Yu, Xu and Prithwish

 

Prithwish Tribedy

Physics Department, Brookhaven National Laboratory

Upton, NY 11973, USA

Phone: 631-344-8904, 631-344-3853

E-mail: ptribedy AT bnl.gov

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