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["Ye, Zhenyu" <yezhenyu AT uic.edu>]

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From: "Sivertz, Michael" <sivertz AT bnl.gov>

Subject: Minutes of the ESRC Meeting to review the STAR Forward Silicon Tracker materials compatibility.

Date: October 19, 2020 at 3:51:48 PM CDT

To: "Craner, Francis" <fcraner AT bnl.gov>, "Sivertz, Michael" <sivertz AT bnl.gov>, "Passarello, David J" <passare1 AT bnl.gov>, "Mohamed, David" <dmohamed AT bnl.gov>, "Romero, Marcel" <mromero AT bnl.gov>, "Hammons, Lee" <hammons AT bnl.gov>, "Christie, William" <christie AT bnl.gov>, "Pak, Robert" <pak AT bnl.gov>, "Ye, Zhenyu" <zye AT bnl.gov>, "Videbaek, Flemming" <videbaek AT bnl.gov>, "nie AT rcf.rhic.bnl.gov" <nie AT rcf.rhic.bnl.gov>, "Capotosto, Michael" <capotosto AT bnl.gov>, "yiyang AT ncku.edu.tw" <yiyang AT ncku.edu.tw>, "Bergh, Paul J" <pbergh AT bnl.gov>, "Blydenburgh, Tracy R" <blydenburgh AT bnl.gov>, "Campione, Lenny J" <campione AT bnl.gov>, "Cirnigliaro, Peter P" <cirn AT bnl.gov>, "Drees, Angelika" <drees AT bnl.gov>, "Fliller, Raymond" <rfliller AT bnl.gov>, "Folz, Charles" <cfolz AT bnl.gov>, "Gaffney, Michael" <gaffney AT bnl.gov>, "Kusche, Karl" <kusche AT bnl.gov>, "Lambiase, Robert" <lambiase AT bnl.gov>, "Levesque, Joseph W" <levesque AT bnl.gov>, "Palmer, Mark" <mpalmer AT bnl.gov>, "Pearson, Charles E" <pearson AT bnl.gov>, "Poblaguev, Andrei" <poblaguev AT bnl.gov>, "Roser, Thomas" <roser AT bnl.gov>, "Sampson, Paul" <sampson AT bnl.gov>, "Sullivan, Patrick (BHSO)" <Patrick.Sullivan AT science.doe.gov>, "Tuozzolo, Joseph E" <tuozzolo AT bnl.gov>, "VanEssendelft, Melvin J" <mvaness AT bnl.gov>, "yezhenyu AT uic.edu" <yezhenyu AT uic.edu>, "Hoffman, Caitlin" <hoffman AT bnl.gov>

Cc: "Sivertz, Michael" <sivertz AT bnl.gov>

ESRC meeting to review the STAR Forward Silicon Tracker

 

19 October 2020                     3:00 PM

 

The purpose of this review is to seek approval of the materials being used in the production of the STAR Forward Silicon Tracker.

Presentation by Zhengyu Ye: https://www.c-ad.bnl.gov/esfd/ESRC%20Files/RHIC/STAR/Forward%20Silicon%20Tracker/

 

Attending: Andrei Poblaguev, Frank Craner, Elke-Caroline Aschenauer, Flemming Videbaek, Ray Fliller, Mike Gaffney, Joe Levesque, Karl Kusche, Lee Hammons, Mel van Essendelft, Michael Capotosto, David Mohamed, David Passarello, Robert Pak, Marcel Romero, Paul Sampson, Joe Tuozzolo, Bill Christie, Xu Sun, Yi Yang, Zhengyu Ye, Mike Sivertz (recording)

 

There were two issues of concern:

1) What is the total volume of Kapton used in the assembly?

2) What is the change in burst pressure of the Tygon tubing used in the cooling system after exposure to 16 kGy?

 

Here are the comments that came up in the discussion.

Mike Gaffney: The total amount of Kapton should be reviewed by Fire Protection Engineering for flammable load assessment.

Joe Levesque: What does PEEK stand for?  Polyetheretherketone (PEEK)

MikeG: Need to get the specification for the cooling system.  Type of coolant, pressure rating and leak detection.

JoeL: Next question: ES&H rating of “good”, what does that mean?  I am interested in the flammability.

JoeL: I Googled PEEK, it has a  UL flammability rating of V-0.  I am OK with this.

MikeG: What is the meaning of  “No significant change” to the tygon?  What the material under pressure when radiated?

JoeL: From the Dupont Fact Sheet on Kapton, it is UL V-O.  However, when exposed to fire it gives off gasses of concern.

JoeL: Fire Hazards from Dupont:

Whether in storage or use, Kapton® is unlikely to add appreciably

to the hazards of fire. Bulk quantities of Kapton® (over 100 lb)

should be stored away from flammable materials. In the event of

fire, personnel entering the area should use a fresh air supply or a

respirator. All types of chemical extinguishers may be used to fight

fires involving Kapton®. Large quantities of water also may be used

to cool and extinguish a fire.

JoeL: In this use, it is away from combustible materials.  It would be an item of interest as to the weight of Kapton present (an estimate is good).

Elke: yes, it is not close at all to any combustible material

Flemming: The IST cooling system manual say 54 psi was used for IST

Flemming: It also operates at ambient temperature of 24 degrees C.