Dr Stuart Davidson
Science Area Leader – Mechanical Metrology
National Physical Laboratory, UK
Kilogram redefinition and its future implications
The SI unit of mass, the kilogram, was redefined in May of 2019. As well as ensuring the future stability of the global mass scale, the new definition offers huge opportunities to improve the way the SI unit of mass is realised and disseminated. This presentation will explore this potential, highlighting end-user devices which can offer direct traceability to the SI for mass, force and torque measurements at the point of need.
Stuart Davidson is the Science Area Leader for Mechanical Metrology the National Physical Laboratory. He has been responsible for some major advances in the field of measurement including the direct measurement of the density of air, weighing in vacuum and the use of surface analysis to predict the stability of mass standards. He is a past chairman of the EURAMET Technical Committee for Mass and Related Quantities, and current chairman of the CCM Working Group for Mass. He also chaired the Task Group which oversaw the implementation of the redefined kilogram and the development of the kilogram consensus value which is currently being used to maintain and disseminate the SI unit of mass. He also works on the development of the NPL next-generation Kibble balance to realise the new kilogram.
Dr. Jay H. Hendricks
Deputy Program Manager for NIST on a Chip
NIST Photonic Realization of the Pascal and Methods of Photonic Thermometry with “NIST on a Chip” Program
The world of pressure and vacuum measurements and standards is currently undergoing a revolution in both measurement traceability, “the fundamental philosophy behind a measurement chain back to primary units”, and measurement technology, the “how a measurement is made”. This keynote presentation covers a bit of metrology history of how we got to where we are today and gives a forward-looking vision for the future. The role of NIST as a National Metrology institute is described along with an explanation of how and why our world-wide standards changed on May 20th, 2019. The NIST on a Chip program (NOAC) is introduced which seeks to utilize fundamental physics and laws of nature to develop quantum-based sensors and standards that one day may be miniatured to the chip scale. The technical core of the lecture will be a deeper dive into new research on measurement methods for pressure, the Fixed Length Optical Cavity (FLOC) and for vacuum, the Cold Atom Vacuum Standard (CAVS). What is exciting about these new measurement approaches is that they are both primary (relying on fundamental physics), are quantum-based and use photons for the measurement readout which is key for taking advantage of the fast-growing field of photonics. The FLOC will enable the elimination of mercury barometers pressure standards worldwide and the CAVS will be first primary standard for making vacuum measurements below 1.3 × 10-5 Pa. Briefly the Sensitive Photonic Optical Thermometer SPOT will be introduced.
A world-class expert in low pressure and vacuum metrology, Dr. Hendricks is the Deputy Program Manager for NIST on a Chip (NOAC), an innovative approach that seeks to utilize fundamental physics to develop quantum-based sensors and standards. He is the Scientific Director of IUVSTA (International Union of Vacuum Science, Technique and Application) an organization representing > 15,000 physicists, chemists, materials scientists, engineers, and technologists linked by their common study and use of vacuum Science. Dr. Hendricks received Ph.D. and M.A. and in Physical Chemistry from Johns Hopkins University, and his B.S. in Chemistry from Penn State University. Dr. Hendricks has 30 years of vacuum science and technology experience and has authored over 70 peer-reviewed publications. He is a two-time winner of US Department of Commerce Gold Medal, one of which was for an innovative quantum-based pressure standard.A world-class expert in low pressure and vacuum metrology, Dr. Hendricks is the Deputy Program Manager for NIST on a Chip (NOAC), an innovative approach that seeks to utilize fundamental physics to develop quantum-based sensors and standards. He is the Scientific Director of IUVSTA (International Union of Vacuum Science, Technique and Application) an organization representing > 15,000 physicists, chemists, materials scientists, engineers, and technologists linked by their common study and use of vacuum Science. Dr. Hendricks received Ph.D. and M.A. and in Physical Chemistry from Johns Hopkins University, and his B.S. in Chemistry from Penn State University. Dr. Hendricks has 30 years of vacuum science and technology experience and has authored over 70 peer-reviewed publications. He is a two-time winner of US Department of Commerce Gold Medal, one of which was for an innovative quantum-based pressure standard.
Dr. Thomas Bruns
Head of the "Acoustics and Dynamics" department
Physikalisch-Technische Bundesanstalt (PTB), Germany
"Infra-AUV" improving traceability in the very low frequency range for Acoustics and Vibration
Measurement of seismic and infra sound activity are of increasing global importance for the monitoring of extreme events such as volcano eruptions, earthquakes, tsunamis or nuclear weapon testing. The respective low frequency monitoring techniques using infra sound, seismic or under water acoustic measurements are well-established for local applications and in large networks of monitoring stations like the IMS or GSN. However, the sensors used in such monitoring stations are rarely, if ever traceably calibrated. This deficiency is owed to the fact that the required low frequency calibration capabilities are typically not yet available on the primary level of national metrology institutes, even more so are the necessary on-site calibration methods unavailable, which are needed to cope with immobile sensor set-ups on the monitoring stations. In an effort to answer the proactive request of the CTBTO to the CCAUV in 2017, a consortium of EUROPEAN Metrology Institutes, monitoring station operators and infra sound experts started to develop and validate methods to provide the desired traceability chain from the primary laboratory to the monitoring station on-site in 2020. The plenary will give an insight in the motivation and the challenges, the current research and development status and the final goals of this multi-national research project.
Since 2015 Dr. Bruns is the head of the department "Acoustics and Dynamics" of PTB. He studied Physics at the University of Göttingen Germany and has a Diploma in the field of particle physics and his PhD in the field of biomechanics and computational physics. Since 1998 he is working as scientist at PTB with a focus in dynamic mechanical metrology, i.e. dyna ic force and torque calibration as well as acceleration in terms of vibration and shock. He is internationally active in the respective groups of IMEKO, ISO, CCAUV and EURAMET.
Developments in Hardness Measuring Instruments
Hardness is an important mechanical property of material that is widely tested in many industrial sectors such as automotive, aviation, defense, material producers, research laboratories and institutes. An important part of providing traceability to hardness testing machines is to make use of certified reference materials called hardness reference blocks. In this presentation the most widely used hardness measurement methods and the latest developments in hardness measuring instruments (mainly standardizing machines used for certification of the hardness reference blocks) over more than 25 years will be explained.
Cihan Kuzu is Chief Researcher in the field of Hardness at TÜBİTAK UME (National Metrology Institute of Türkiye). He has been working on establishment of the most important and widely used hardness scales at UME. Besides using hardness standards produced by some companies, he has been interested in designing, production and installation of hardness standard machines and systems for realization of the most important and widely used scales. In the final stage 71 percent of the calibration of the hardness reference blocks at TÜBİTAK UME is provided with domestic production hardness standard systems that were designed by himself. He is also representing UME and Türkiye in the CCM WGH, IMEKO TC5, ISO TC 164 SC3 and EURAMET where hardness related studies are realized.