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[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

This is good news, indeed. 

If it works, it would solve our problem for the upcoming Run. 
But it also brings a new potential issue, that we need to replace the cooling 
tubes every year. 
If we can avoid it, it will be the best.

Zhenyu

> On May 27, 2021, at 2:33 PM, Tribedy, Prithwish <ptribedy AT bnl.gov> wrote:
> 
> 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:  
>       • The hard tubes were very stiff, bending radius was large but had 
> less leak. 
>       • 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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