EPJ Techniques and Instrumentation: SI units and experimental techniques
- Details
- Published on 30 March 2021
The revision of the SI, which took effect 2019, has been made possible due to impressive progress in metrology associated to experimental determinations of a range of fundamental natural constants. Several of the latter now have fixed values and serve as definitions of SI base units. New technological developments are, to name a few examples, the Kibble balance, frequency combs, atomic frequency standards and dielectric-constant gas thermometry.
To this topical issue, we invite original articles related to all aspects of detailed technology and implementations of SI units and the associated natural constants. The issue will serve to disseminate all such aspects of the experimental apparatuses involved that are useful for the metrological and general scientific community. This includes hardware, experimental controls, diagnostics, software and also regional implementations and techniques for international comparisons of standards.
Topics of interest include but are not limited to experimental and diagnostic aspects, measurements, methods, best practices, algorithms, calibrations, distribution and comparison of unit standards, for example for:
- the kilogram – the Planck constant
- the meter – the speed of light
- the second – frequency standards
- the ampere – the elementary charge
- the kelvin – the Boltzmann constant
- the candela – luminous standards
- the mole – the Avogadro constant
The Lead guest editor
Anders Kastberg, This email address is being protected from spambots. You need JavaScript enabled to view it.
Submission deadline: August 31st, 2021
Submission Instructions
For more information please contact the Lead Editor editor: This email address is being protected from spambots. You need JavaScript enabled to view it.
EPJ Techniques and Instumentation: Diagnostics for electric propulsion systems
- Details
- Published on 28 October 2020
Electric propulsion by various kinds of thrusters (plasma, ion,…) is a rapidly growing technology for engines of satellites and space probes for near-Earth and space exploration. In order to optimize such propulsion systems in different regimes (from a few µN to several N thrust) the availability of suitable and proper diagnostics is of fundamental importance. The diagnostics include, for example, electric, spectroscopic, calorimetric and momentum measurements during the development stage in the lab as well as during operation under space conditions.
This topical issue reviews the design and operating experience of related diagnostics and control systems from a number of different thruster concepts and missions. Topics such as hardware and software choices, links to spacecraft breadboard systems, communication and signal processing and resulting performance are covered as well.
Topics of interest include but are not limited to experimental and diagnostic aspects, measurements, methods, and fields of applications, such as:
- thrust measurements
- plasma probe diagnostics
- electric thruster optimization
- non-conventional methods
- modelling and simulation for diagnostics
The Lead guest editor
Holger Kersten, This email address is being protected from spambots. You need JavaScript enabled to view it.
Submission deadline: 31 May 2021
Submission Instructions
For more information please contact the Lead Editor editor: This email address is being protected from spambots. You need JavaScript enabled to view it.
