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[Aschenauer Elke-Caroline <elke AT bnl.gov>]

sorry, maybe I’m on the wrong track, but would it not be better to use the open NOVEC as fast as possible to avoid that it gets water in it.

Cheers elke

On Oct 20, 2021, at 15:59, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:

Thank you for the efforts, Prithwish.

I would propose to continue using the small barrels of new NOVEC for run 22, and use the NOVEC from the opened drum from PHENIX towards the end of the run or in the summer. 

Zhenyu 

On Oct 20, 2021, at 2:34 PM, Tribedy, Prithwish <ptribedy AT bnl.gov> wrote:

Hello Everyone,

 Good news!! The report from the chemistry lab has arrived. The water contamination in the remaining NOVEC liquid from the opened drum is well below 90 ppm (as required for safe operations according to the 3M experts). 

We provided the chemists with three samples: 1) from the top layer of the opened drum (Sample A TOP), 2) from the bottom of the opened drum (Sample B BOT) and, 3) from a newly opened small NOVEC container (Sample C SML). All the samples have been checked twice and found to have water contaminations at the level of 41-44 ppm. This level of contamination is permissible for safe operations as per our previous communication with the 3M experts. 

So, we can go ahead and use the NOVEC from the opened drum for the upcoming run. 

We're grateful to our colleagues from the Neutrino and Nuclear Chemistry group of the Chemistry Department at BNL. 

Regards,

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

Begin forwarded message:

From: "Gokhale, Sasmit" <sgokhale AT bnl.gov>

Subject: Water content analysis of C4F9OC2H5 coolant liquid

Date: October 20, 2021 at 2:28:28 PM EDT

To: Prithwish Tribedy <ptribedy AT icloud.com>, "Yeh, Minfang" <yeh AT bnl.gov>

Cc: "Hu, Yu" <yuhu AT bnl.gov>

Hello Prithwish,

 

I hope you are doing well. I have finished analyzing the three samples that you gave us. I ran two Karl Fischer titration measurements for each of the three bottles that you provided i.e. one sample was collected from the top and bottom of the each bottle. Below are the results:

 

Sample A BOT:

Measurement 1: water content = 43.98 ppm

Measurement 2: water content = 44.89 ppm

 

Sample B TOP:

Measurement 1: water content = 42.22 ppm

Measurement 2: water content = 43.23 ppm

 

Sample C SML:

Measurement 1: water content = 41.98 ppm

Measurement 2: water content = 41.79 ppm

 

To check the accuracy, I also ran a sample of one of our organic solvents which should have a water content between 60 to 80 ppm and the measured water quantity for that liquid was 63.18 ppm. So it seems the measured values can be trusted.

 

Please let me know if you have any further questions.

 

Best Regards,

Sasmit

 

 

Sasmit Gokhale

Research Associate

Brookhaven National Lab 

Building 555

Upton, NY 11973

Phone: 631-344-4992

Email: sgokhale AT bnl.gov

 

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