round robin

Q Standard Round Robin

This page is the working page for the Q Standard round robin.

Members

• Joseph Kline (NIST - chair)
• Adrian Rennie (Uppsala University)
• Paul Butler (NIST)
• Others TBA

Planning Thoughts

• Shipping a valuable sample internationally without incurring taxes will require some careful planning/ thought. It may be easiest to ship back and forth from a central place (NIST seems the most natural in this case) rather than actually pass the same artifact around directly? Also arrange for return shipping as part of shipping?
• Need to develop protocol to send to each participant. How well the protocol works will help in refining the final protocol sent with the artifact. Protocol should probably include:
  • calibrate instrument in usual way
  • measuring a standard nanoparticle sample
  • measuring the artifact using a rocking curve to ensure a proper measurement
  • measuring the artifact rotating around the center point to get Qx and Qy on the detector
  • position accuracy of 1mm is probably good enough
  • rotational accuracy of 0.1 degrees is probably sufficient
  • return measured pitch.