Research Output 1984 2019

Article
172 Citations (Scopus)

Single-electron current sources: Toward a refined definition of the ampere

Pekola, J. P., Saira, O-P., Maisi, V. F., Kemppinen, A., Möttönen, M., Pashkin, Y. A. & Averin, D. V., 2013, In : Reviews of Modern Physics. 85, 4, 1421.

Research output: Contribution to journalArticleScientificpeer-review

electrons
International System of Units
metrology
integers
readout
18 Citations (Scopus)

Single-electronic radio-frequency refrigerator

Kafanov, S., Kemppinen, A., Pashkin, Y. A., Meschke, M., Tsai, J. S. & Pekola, J. P., 2009, In : Physical Review Letters. 103, 4 p., 120801.

Research output: Contribution to journalArticleScientificpeer-review

refrigerators
radio frequencies
single electron transistors
thermometers
electric potential
32 Citations (Scopus)

Single-electron shuttle based on a silicon quantum dot

Chan, K. W., Möttönen, M., Kemppinen, A., Lai, N. S., Tan, K. Y., Lim, W. H. & Dzurak, A. S., 2011, In : Applied Physics Letters. 98, 21, 3 p., 212103.

Research output: Contribution to journalArticleScientificpeer-review

quantum dots
electron gas
silicon
electrons
electric potential
7 Citations (Scopus)

Spectrally adjustable quasi-monochromatic radiance source based on LEDs and its application for measuring spectral responsivity of a luminance meter

Hirvonen, J-M., Poikonen, T., Vaskuri, A., Kärhä, P. & Ikonen, E., 2013, In : Measurement Science and Technology. 24, 11, 8 p., 115201.

Research output: Contribution to journalArticleScientificpeer-review

Responsivity
Luminance
Radiance
luminance
radiance
2 Citations (Scopus)

Spectroscopic thermometry for long-distance surveying

Tomberg, T., Fordell, T., Jokela, J., Merimaa, M. & Hieta, T., 10 Jan 2017, In : Applied Optics. 56, 2, p. 239-246 8 p.

Research output: Contribution to journalArticleScientificpeer-review

Thermometers
Surveying
temperature measurement
thermometers
Temperature measurement
1 Citation (Scopus)

Spin Resonance Clock Transition of the Endohedral Fullerene N 15 @ C60

Harding, R. T., Zhou, S., Zhou, J., Lindvall, T., Myers, W. K., Ardavan, A., Briggs, G. A. D., Porfyrakis, K. & Laird, E. A., 4 Oct 2017, In : Physical Review Letters. 119, 14, 140801.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
spin resonance
clocks
fullerenes
frequency stability
atomic clocks
8 Citations (Scopus)

Stimulated power generation in ES-SIS junction arrays

Hassel, J., Helistö, P., Grönberg, L., Seppä, H., Nissilä, J. & Kemppinen, A., 2005, In : IEEE Transactions on Instrumentation and Measurement. 54, 2, p. 632 - 635 4 p.

Research output: Contribution to journalArticleScientificpeer-review

SIS (superconductors)
Superconducting materials
Power generation
electric potential
Electric potential
9 Citations (Scopus)

Strong attenuation of the transients' effect in square waves synthesized with a programmable Josephson voltage standard

Jeanneret, B., Overney, F., Rufenacht, A. & Nissilä, J., 2010, In : IEEE Transactions on Instrumentation and Measurement. 59, 7, p. 1894-1899 6 p.

Research output: Contribution to journalArticleScientificpeer-review

square waves
attenuation
Electric potential
electric potential
waveforms
4 Citations (Scopus)

Superconducting MoSi nanowires

Lehtinen, J. S., Kemppinen, A., Mykkänen, E., Prunnila, M. & Manninen, A. J., 1 Jan 2018, In : Superconductor Science and Technology. 31, 1, 015002.

Research output: Contribution to journalArticleScientificpeer-review

Nanowires
nanowires
wire
Wire
Rapid thermal annealing
10 Citations (Scopus)

Suppression of the critical current of a balanced superconducting quantum interference device

Kemppinen, A., Manninen, A. J., Möttönen, M., Vartiainen, J. J., Peltonen, J. T. & Pekola, J. P., 2008, In : Applied Physics Letters. 92, 5, 3 p., 052110.

Research output: Contribution to journalArticleScientificpeer-review

critical current
retarding
interference
Josephson junctions
inductance
2 Citations (Scopus)

Thin film process for Nb/NbOx/(Pb-In-Au) Josephson junction devices

Salmi, J., Knuutila, J., Seppä, H. & Immonen, P., 1985, In : Thin Solid Films. 126, 1-2, p. 77 - 81 5 p.

Research output: Contribution to journalArticleScientificpeer-review

Josephson junction devices
Josephson junctions
Vacuum deposition
Thin films
vacuum deposition
4 Citations (Scopus)

Traceability and Characterization of a 1000 kV HVDC Reference Divider

Elg, A-P., Bergman, A., Hällström, J., Kharezy, M. & Nieminen, T., 2015, In : IEEE Transactions on Instrumentation and Measurement. 64, 6, p. 1709-1715

Research output: Contribution to journalArticleScientificpeer-review

dividers
high voltages
Electric potential
Calibration
resistors
4 Citations (Scopus)

Traceable Coulomb blockade thermometry

Hahtela, O., Mykkänen, E., Kemppinen, A., Meschke, M., Prunnila, M., Gunnarsson, D., Roschier, L., Penttilä, J. & Pekola, J., 1 Feb 2017, In : Metrologia. 54, 1, p. 69-76 8 p.

Research output: Contribution to journalArticleScientificpeer-review

Coulomb blockade
Temperature
Digital voltmeters
Thermodynamics
Temperature scales
11 Citations (Scopus)

Trapping atoms on a transparent permanent-magnet atom chip

Shevchenko, A., Heiliö, M., Lindvall, T., Jaakkola, A., Tittonen, I., Kaivola, M. & Pfau, T., 15 May 2006, In : Physical Review A - Atomic, Molecular, and Optical Physics. 73, 5, 051401.

Research output: Contribution to journalArticleScientificpeer-review

permanent magnets
trapping
chips
traps
atoms
4 Citations (Scopus)

Uncertainty analysis of photometer directional response index f2 using Monte Carlo simulation

Poikonen, T., Blattner, P., Kärhä, P. & Ikonen, E., 2012, In : Metrologia. 49, 6, p. 727-736 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Photometers
Uncertainty analysis
Distance measurement
Monte Carlo simulation
Light sources
6 Citations (Scopus)

Unpolarized, incoherent repumping light for prevention of dark states in a trapped and laser-cooled single ion

Lindvall, T., Fordell, T., Tittonen, I. & Merimaa, M., 2013, In : Physical Review A: Atomic, Molecular, and Optical Physics. 87, 1, 013439.

Research output: Contribution to journalArticleScientificpeer-review

spontaneous emission
lasers
ions
polarization modulation
laser modes

Uusi SI-järjestelmä toteuttaa Maxwellin unelman

Manninen, A., 2012, In : Arkhimedes. 2, p. 10-20 11 p.

Research output: Contribution to journalArticleProfessional

10 Citations (Scopus)

Validating the single charged aerosol reference (SCAR) as a traceable particle number concentration standard for 10 nm to 500 nm aerosol particles

Högström, R., Yli-Ojanperä, J., Rostedt, A., Iisakka, I., Mäkelä, J. M., Heinonen, M. & Keskinen, J., 2011, In : Metrologia. 48, 5, p. 426-436 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Particles (particulate matter)
Aerosols
Calibration
Radiation counters
Charged particles

Validation of the fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres

Kokka, A., Pulli, T., Ferrero, A., Dekker, P., Thorseth, A., Kliment, P., Klej, A., Gerloff, T., Ludwig, K., Poikonen, T. & Ikonen, E., 18 Jun 2019, In : Metrologia. 56, 4, 045002.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Cameras
Fluxes
Electric lamps
Light emitting diodes
33 Citations (Scopus)

White rabbit precision time protocol on long-distance fiber links

Dierikx, E. F., Wallin, A. E., Fordell, T., Myyry, J., Koponen, P., Merimaa, M., Pinkert, T. J., Koelemeij, J. C. J., Peek, H. Z. & Smets, R., 1 Jul 2016, In : IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 63, 7, p. 945-952 8 p., 7383303.

Research output: Contribution to journalArticleScientificpeer-review

rabbits
Network protocols
fibers
Fibers
Optical fibers
4 Citations (Scopus)

Worldwide comparison of lightning impulse voltage measuring systems at the 400-kV level

Hällstrom, J., Aro, M., Bergman, A., Bovier-Lapierre, V., Garnacho, F., Juvik, J. I., Kiseliev, V., Lian Hong, Z., Lucas, W., Li, Y., Pykälä, M. L., Rungis, J., Schon, K. & Truong, V. H., 2007, In : IEEE Transactions on Instrumentation and Measurement. 56, 2, p. 388-391

Research output: Contribution to journalArticleScientificpeer-review

lightning
Lightning
impulses
Electric potential
electric potential
Conference Abstract

Improved systematic and random errors for long-distance time-transfer using PTP White Rabbit

Wallin, A., Rizzi, M., Calvés, G. M., Fordell, T. & Näränen, J., 2018.

Research output: Contribution to conferenceConference AbstractScientificpeer-review

Towards distributed fault-tolerant timekeeping based on a WR-network

Wallin, A., 2018.

Research output: Contribution to conferenceConference AbstractScientific

Clocks
Multiplexing
Kalman filters
Hardware
Conference abstract in proceedings

An optical atomic clock using a single 171Yb+ ion with a characterisation of thermal systematic effects

Baynham, C., Curtis, E. A., Godun, R. M., Jones, J. M., Nisbet-Jones, P. B. R., Baird, P. E. G., Gill, P., Fordell, T. & Lindvall, T., 1 Jul 2018, Book of abstracts of the 50th Anniversary EGAS conference. p. 81 1 p.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

A Simple High-Performance Remote-Maser Concept

Fordell, T. & Wallin, A., 2018, 2018 European Frequency and Time Forum (EFTF): Abstracts. p. 143

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

International timescales with optical clocks

Margolis, H. S., Benkler, E., Calonico, D., Denker, H., Delva, P., Godun, R. M., Lisdat, C., Achkar, J., Bize, S., Gersl, J., Gill, P., Lindvall, T., Merimaa, M., Pizzocaro, M., Piester, D., Riedel, F., Cesia, I., Shemar, S. L., Sterr, S. L., Timmen, L. & 4 others, Voigt, C., Vogt, S., Weyers, S. & Whibberley, P. B., 2015, Book of abstracts. Institute of Electrical and Electronic Engineers IEEE

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Recent progress on the MIKES 88Sr+ ion clock

Lindvall, T., Fordell, T., Wallin, A. E. & Merimaa, M., 2014, Book of abstracts: ECTI 2014 – 3rd European Conference on Trapped Ions. p. 61-61 PI-13

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Open Access
Conference article

Blackbody Radiation Shifts for 171Yb+ Optical Clock Transitions

Baynham, C. F. A., Curtis, E. A., Godun, R. M., Jones, J. M., Nisbet-Jones, P. B. R., Gill, P., Fordell, T., Hieta, T. & Lindvall, T., 2017. 2 p.

Research output: Contribution to conferenceConference articleScientific

Open Access
clocks
frequency shift
shift
radiation
thermal environments

Defining the Robust Timing Service for Future EGNSS

Dierikx, E., Bauernfeind, R., Wallin, A., Özel, F., Zelle, H. & Kirkko-Jaakkola, M., 2017.

Research output: Contribution to conferenceConference articleScientific

Timekeeping and network time transfer

Wallin, A., 2017.

Research output: Contribution to conferenceConference articleScientific

Towards an Yb+ optical clock with a BBR uncertainty below 10^(-18)

Jones, J., Godun, R., King, S., Nisbet-Jones, P., Baynham, C., Fordell, T., Hieta, T., Lindvall, T., Bongs, K., Baird, P. & Gill, P., 2016.

Research output: Contribution to conferenceConference articleScientific

Conference article in proceedings
2 Citations (Scopus)

Application of Charge-Sensitive Preamplifier for the Calibration of Partial Discharge Calibrators Below 1 pC

Havunen, J. & Hällström, J., 2018, CPEM 2018 - Conference on Precision Electromagnetic Measurements. Institute of Electrical and Electronic Engineers IEEE, 2 p. 643

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

calibration
software
services
method

A quantum Hall effect silicon chip

Grönberg, L., Pohjonen, H., Murto, T., Heleskivi, J., Immonen, P. & Seppä, H., 1984, 11th Nordic Semiconductor Meeting. Espoo: VTT Technical Research Centre of Finland, p. 209-212 (VTT Symposium; No. 45).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)

A reference merging unit and calibration setup for sampled values over Ethernet

Lehtonen, T. & Hällström, J., 11 Aug 2016, Precision Electromagnetic Measurements (CPEM 2016), 2016 Conference on. Institute of Electrical and Electronic Engineers IEEE, p. 1-2

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Ethernet
Merging
Calibration
Hardware

A three-phase calibration and field measurement setup based on a custom digitizer

Lehtonen, T., Hällström, J. & Suomalainen, E-P., 11 Aug 2016, Precision Electromagnetic Measurements (CPEM 2016), 2016 Conference on . Institute of Electrical and Electronic Engineers IEEE, p. 1-2

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

analog to digital converters
Finland
attenuators
budgets
computer programs

Bilateral high voltage ac peak and rms value comparison up to 150 kV between VTT and PTB

Meisner, J., Suomalainen, E-P., Hällström, J., Schmidt, M. & Seifert, H., 11 Aug 2016, Precision Electromagnetic Measurements (CPEM 2016), 2016 Conference on . Institute of Electrical and Electronic Engineers IEEE, p. 1-2

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Electric potential
Capacitors
Voltmeters
Voltage dividers
Gases
1 Citation (Scopus)

Bilateral international inductance comparison using traveling standards in thermoregulated enclosures

Funck, T., Bothe, H., Kolling, A., Satrapinski, A. & Suomalainen, E. P., 10 Aug 2016, CPEM 2016 - Conference on Precision Electromagnetic Measurements, Conference Digest. Institute of Electrical and Electronic Engineers IEEE, 7540510

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

enclosure
Enclosures
inductance
Inductance
frequency ranges

Characterization of epitaxial and CVD graphene with double metal-graphene

Novikov, S., Hämäläinen, J., Walden, J., Iisakka, I., Lebedeva, N. & Satrapinski, A., 2013, Proceedings: 16th International Congress of Metrology. Filtz, J. R. (ed.). EDP Sciences, 4 p. 13003

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Open Access
Graphite
Chemical vapor deposition
Metals
Ozone
Sensors

Charcterization of a Fast Step Generator

Bergman, A., Nordlund, M., Elg, A-P., Meisner, J., Passon, S., Hällström, J. & Lehtonen, T., 2017, Proceedings.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Comparison of Sampling Voltage Measurements of Multi-Tone Signals

Sira, M., Diaz De Aguilar, J., Öztürk, T., Lee, J., Behr, R. & Nissilä, J., 2018, CPEM 2018 - Conference on Precision Electromagnetic Measurements. Institute of Electrical and Electronic Engineers IEEE, 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Voltage measurement
Sampling
Electric potential
1 Citation (Scopus)

Current Step Generation and Measurement with Nanosecond Rise Time using Coaxial Cable Generator

Rehman, M. Z., Hallstrom, J. & Havunen, J., 14 Feb 2019, 2018 IEEE International Conference on High Voltage Engineering and Application: ICHVE 2018. Institute of Electrical and Electronic Engineers IEEE, 8642188. (ICHVE 2018 - 2018 IEEE International Conference on High Voltage Engineering and Application).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Coaxial cables
Electric sparks
Sensors
Calibration
Geometry
1 Citation (Scopus)

Demonstration of 50-Hz electrical active power measurement using a micromechanical magnetometer

Rimminen, H., Hällström, J., Immonen, P., Seppä, H., Manninen, A., Latonen, T., Kyynäräinen, J. & Kärkkäinen, A., 2012, Proceedings: Conference on Precision electromagnetic Measurements, CPEM 2012 2012. Institute of Electrical and Electronic Engineers IEEE, p. 232-233

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Magnetometers
Demonstrations
Lorentz force
Magnetic couplings
Electric potential
1 Citation (Scopus)

Demonstrator of Time Services based on European GNSS signals: The H2020 DEMETRA Project

Defraigne, P., Tavella, P., Sesia, I., Cerretto, G., Signorile, G., Calonico, D., Costa, R., Clivati, C., Cantoni, E., De Stefano, C., Frittelli, M., Formichella, V., Biserni, E., Leone, V., Zarroli, E., Sormani, D., Gandara, M., Hamoniaux, V., Varriale, E., Morante, Q. & 17 others, Widomski, T., Kaczmarek, J., Uzycki, J., Borgulski, K., Olbrysz, P., Kowalski, J., Cernigliaro, A., Fiasca, F., Perucca, A., Dhiri, V., Veiga, M. T., Suárez, T., Diaz, J., Mangiantini, M., Wallin, A. E., Galleani, L. & Hindley, D., 1 Jan 2017, Precise Time and Time Interval Systems and Applications Meeting, PTTI 2017. p. 127-137 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Open Access
Traffic control
Finance
Telecommunication
Demonstrations
Calibration

Design and performance of a fast divider for puncture testing

Hällström, J., Kazmi, S., Havunen, J. & Pykälä, M-L., 2017, Proceedings.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Design of a Metrology Grade Fibre Optical Current Sensor

Elg, A-P., Lindgren, M., Hedekvist, P. O., Ebenhag, S-C., Hällström, J., Istrate, D., Kiiveri, P., Niewczas, P. & Fusiek, G., 2017, 2017 ISH: 20th International Symposium on High Voltage Engineering. Díaz, R. R., Assaf, L. O., Silva, J. & Rizzotti, B. (eds.).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Development and calibration of an HV Impulse Reference Divider

Cherbaucich, C., Gentili, M., Hällström, J., Havunen, J., Mazza, P., Orrea, A., Rizzi, G. & Sardi, A., 2017, 2017 ISH: 20th International Symposium on High Voltage Engineering.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Calibration
Step response
Testing
Electric potential
Deconvolution

Driving a Josephson Junction Array with a Mode-Locked Laser and a Photodiode

Nissilä, J., Fordell, T., Kieler, O. & Behr, R., 2018, CPEM 2018 - Conference on Precision Electromagnetic Measurements. Institute of Electrical and Electronic Engineers IEEE, 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Josephson junctions
photodiodes
lasers
pulse rate
pulse generators

Effect of Coaxial Cables on Measurements Performed with Resistive Lightning Impulse Voltage Dividers

Havunen, J., Passon, S., Hällström, J. & Bergman, A., 19 Oct 2018, CPEM 2018 - Conference on Precision Electromagnetic Measurements. Institute of Electrical and Electronic Engineers IEEE, 2 p. 8501140

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Voltage dividers
Coaxial cables
Lightning
Electric potential
Cables

EGNSS Based Robust Synchronization Service

Dierikx, E., Wallin, A., Merimaa, M., Bauernfeind, R., Kirkko-Jaakkola, M., Catalano, V., Aarmo, K. A. & Borio, D., 27 Oct 2017, 2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFC 2017 - Proceedings. Institute of Electrical and Electronic Engineers IEEE, p. 385-387 3 p. 8088899

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Critical infrastructures
synchronism
Synchronization

Evaluation of Step Response of Transient Recorders for Lightning Impulse

Bergman, A., Elg, A-P. & Hällström, J., 2017, Proceedings.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review