- Test stands

• Xu Sun: https://drupal.star.bnl.gov/STAR/system/files/FST_TestStand_Discussion.pdf 
  
• Andres Aguilar: https://drupal.star.bnl.gov/STAR/system/files/STAR%20Presentation.pdf
• Yu Hu: https://drupal.star.bnl.gov/STAR/system/files/status_of_IST_testing_stander_at_bnl_18Feb2020_UIC.pdf

- Module assembly procedure 

• End March EASTON produced three mechanical structure, with visible bending issue
  
• Early July NCKU completed a new design with different materials and thickness, and flexibility of air vs liquid cooling
  
• Mid Aug NCKU signed the contract with EASTON to produce mechanical-structure 
  
• End Aug NCKU was asked to find out from EASTON and AIDC the tolerances they can achieve in mechanical structure and mounting hybrids
  
• Mid Sep The tolerance for Hybrid fabrication is 200 microns, and mechanical structure dimension 150 microns. EASTON on surface flatness: "it is mostly determined by the mold and they have confident to make it flat. But they need to see the actual product.". 
  
• Mid Oct EASTON made the 1st prototypes but with visible bending. Going to add a rib and increase number of injection points. 
• Nov 4 NCKU Received the 1st prototypes from EASTON. Going to further increase the injection point 
  
• Nov 19 NCKU received the 2nd batch PEEK+30%GF with visible bending, Going to split the mold and inject from the center,
  
• Dec 10 NCKU received the 3rd batch using better flow PEEK+30%CF and removed center. See improvement than the previous batch but still measured with 500-700 micron bending. Going to increase the thickness from 1.5 to 2mm
  
• Dec 20 NCKU received the 4th batch with pure PEEK and 2mm thickness. 

• Jan 6 AIDC measured the 4th batch: Inner and Outer 100-150 micron. AIDC will remove the center of the outer and remeasure
  
• Jan 20 EASTON will try to improve the flatness by heating the structure. May be able to achieve 150 microns or better
  
• Jan 30 AIDC assembled and measured the 1st prototype. Maximum deviation: Inner 150 micron Outer 270 microns
  
• Feb 7 AIDC assembled the 2nd prototype. 
  
• Feb 14 Yi measured at NTU, RMS of 1st prototype:  290 micron Inner, 465  outer, 2nd prototype: 260 inner and outer. Will try to determine the maximum deviation from a flat surface
  
• Feb 18 Yi: "will ask EASTON if this can be improved by  making a new mold, or I will find another company to do it"