Research Output 1984 2019

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2019

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

Havunen, J. & Hällström, J., 1 Jun 2019, In : IEEE Transactions on Instrumentation and Measurement. 68, 6, p. 2034-2040 7 p., 8640062.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
preamplifiers
Partial discharges
Calibration
Signal to noise ratio
signal to noise ratios

Broadband lasers for photo-ionization and repumping of trapped ions

Fordell, T. & Lindvall, T., 2019, In : Journal of the Optical Society of America B: Optical Physics. 36, 2, p. 415-420

Research output: Contribution to journalArticleScientificpeer-review

photoionization
broadband
lasers
DBR lasers
ions

Harmonic Power Standard of VTT MIKES

Lehtonen, T. A., 1 Jun 2019, In : IEEE Transactions on Instrumentation and Measurement. 68, 6, p. 2047-2052 6 p., 8556073.

Research output: Contribution to journalArticleScientificpeer-review

harmonics
Voltage dividers
Function generators
Voltage measurement
Transconductance

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
2018
1 Citation (Scopus)

Development of white LED illuminants for colorimetry and recommendation of white LED reference spectrum for photometry

Kokka, A., Poikonen, T., Blattner, P., Jost, S., Ferrero, A., Pulli, T., Ngo, M., Thorseth, A., Gerloff, T., Dekker, P., Stuker, F., Klej, A., Ludwig, K., Schneider, M., Reiners, T. & Ikonen, E., 28 Jun 2018, In : Metrologia. 55, 4, p. 526-534 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Colorimetry
Photometry
Light emitting diodes
Photometers
Calibration

Multiple transfer standard for calibration and characterization of test setups for LED lamps and luminaires in industry

Sperling, A., Meyer, M., Pendsa, S., Jordan, W., Poikonen, T., Renoux, D. & Blattner, P., 2 Feb 2018, In : Metrologia. 55, 2, p. S37-S42

Research output: Contribution to journalArticleScientificpeer-review

Lighting fixtures
Electric lamps
Light emitting diodes
Calibration
Industry
6 Citations (Scopus)

Relationships between junction temperature, electroluminescence spectrum and ageing of light-emitting diodes

Vaskuri, A., Kärhä, P., Baumgartner, H., Kantamaa, O., Pulli, T., Poikonen, T. & Ikonen, E., 15 Mar 2018, In : Metrologia. 55, 2, p. S86-S95

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Electroluminescence
Light emitting diodes
Aging of materials
Temperature
Electric lamps
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
2017
1 Citation (Scopus)

Bilateral international inductance comparison using traveling standards in thermoregulated enclosures

Funck, T., Bothe, H., Kölling, A., Satrapinski, A. & Suomalainen, E. P., 1 Jun 2017, In : IEEE Transactions on Instrumentation and Measurement. 66, 6, p. 1511-1515 5 p., 7801843.

Research output: Contribution to journalArticleScientificpeer-review

enclosure
Enclosures
inductance
Inductance
Finland
2 Citations (Scopus)

Characterizing superconducting filters using residual microwave background

Lehtinen, J. S., Mykkänen, E., Kemppinen, A., Lotkhov, S., Golubev, D. & Manninen, A., 2017, In : Superconductor Science and Technology. 30, 5, 10 p., 055006.

Research output: Contribution to journalArticleScientificpeer-review

Cryogenics
cryogenics
Photons
Microwaves
filters

Controlling single microwave photons: A new frontier in microwave engineering

Lindström, T., Lake, R., Pashkin, Y. A. & Manninen, A., 2017, In : Microwave journal. 60, 5, p. 118-130

Research output: Contribution to journalArticleScientificpeer-review

Electromagnetic waves
Photons
Microwaves
Networks (circuits)
1 Citation (Scopus)

Fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres

Kokka, A., Pulli, T., Poikonen, T., Askola, J. & Ikonen, E., 24 Jul 2017, In : Metrologia. 54, 4, p. 577-583 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Electric lamps
Cameras
Fluxes
Light emitting diodes
Angular distribution
2 Citations (Scopus)

Optimizing Temperature Coefficient and Frequency Response of Rogowski Coils

Lehtonen, T. A. & Hällstrom, J., 15 Oct 2017, In : IEEE Sensors Journal. 17, 20, p. 6646-6652 7 p., 8022679.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
frequency response
Frequency response
coils
coefficients
Temperature
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
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
2016
5 Citations (Scopus)

Accurate Coulomb blockade thermometry up to 60 kelvin

Meschke, M., Kemppinen, A. & Pekola, J. P., 2016, In : Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 374, 2064, 20150052.

Research output: Contribution to journalArticleScientificpeer-review

Coulomb blockade
Kelvin
temperature measurement
Nanofabrication
Electron Beam Lithography
10 Citations (Scopus)

Frequency Comparison of 171 +Ion Optical Clocks at PTB and NPL via GPS PPP

Leute, J., Huntemann, N., Lipphardt, B., Tamm, C., Nisbet-Jones, P. B. R., King, S. A., Godun, R. M., Jones, J. M., Margolis, H. S., Whibberley, P. B., Wallin, A., Merimaa, M., Gill, P. & Peik, E., 1 Jul 2016, In : IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 63, 7, p. 981-985 5 p., 7398135.

Research output: Contribution to journalArticleScientificpeer-review

clocks
Global positioning system
Clocks
Ions
Extrapolation
7 Citations (Scopus)

Mini array of quantum Hall devices based on epitaxial graphene

Novikov, S., Lebedeva, N., Hämäläinen, J., Iisakka, I., Immonen, P., Manninen, A. & Satrapinski, A., 2016, In : Journal of Applied Physics. 119, 17, 174504.

Research output: Contribution to journalArticleScientificpeer-review

quantum Hall effect
graphene
Hall resistance
plateaus
wire
6 Citations (Scopus)

Natural and accelerated ageing of LED lamps

Baumgartner, H., Renoux, D., Kärhä, P., Poikonen, T., Pulli, T. & Ikonen, E., 2016, In : Lighting Research and Technology. 48, 8, p. 930-942

Research output: Contribution to journalArticleScientificpeer-review

Electric lamps
Light emitting diodes
Aging of materials
Heating
Temperature
5 Citations (Scopus)

New evaluation of T - T2000 from 0.02 K to 1 K by independent thermodynamics methods

Engert, J., Kirste, A., Shibahara, A., Casey, A., Levitin, L., Saunders, J., Hahtela, O., Kemppinen, A., Mykkänen, E., Prunnila, M., Gunnarsson, D., Roschier, L., Meschke, M. & Pekola, J., 2016, In : International Journal of Thermophysics. 37, 125

Research output: Contribution to journalArticleScientificpeer-review

thermometers
thermodynamics
evaluation
temperature scales
budgets
6 Citations (Scopus)

Reducing current noise in cryogenic experiments by vacuum-insulated cables

Mykkänen, E., Lehtinen, J., Kemppinen, A., Krause, C., Drung, D., Nissilä, J. & Manninen, A., 2016, In : Review of Scientific Instruments. 87, 10, 10511.

Research output: Contribution to journalArticleScientificpeer-review

Superconducting cables
Refrigerators
White noise
Cryogenics
cables
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
2015
22 Citations (Scopus)

Analysis of thermal radiation in ion traps for optical frequency standards

Doležal, M., Balling, P., Nisbet-Jones, P. B. R., King, S. A., Jones, J. M., Klein, H. A., Gill, P., Lindvall, T., Wallin, A. E., Merimaa, M., Tamm, C., Sanner, C., Huntemann, N., Scharnhorst, N., Leroux, I. D., Schmidt, P. O., Burgermeister, T., Mehlstäubler, T. E. & Peik, E., 12 Nov 2015, In : Metrologia. 52, 6, p. 842-856 842.

Research output: Contribution to journalArticleScientificpeer-review

Frequency standards
Heat radiation
Ions
Temperature
Radiation
8 Citations (Scopus)

Broadband, unpolarized repumping and clearout light sources for Sr+ single-ion clocks

Fordell, T., Lindvall, T., Dubé, P., Madej, A. A., Wallin, A. E. & Merimaa, M., 1 Jan 2015, In : Optics Letters. 40, 8, p. 1822-1825

Research output: Contribution to journalArticleScientificpeer-review

clocks
light sources
broadband
ions
optical spectrum
2 Citations (Scopus)

MEMS-based voltage detector

Helistö, P., Sipola, H., Seppä, H. & Manninen, A. J., 2015, In : Sensors and Actuators A: Physical. 234, p. 99-103

Research output: Contribution to journalArticleScientificpeer-review

microelectromechanical systems
MEMS
Voltage measurement
Detectors
low noise
6 Citations (Scopus)

Performance of a modular wideband HVDC reference divider for voltages up to 1000 kV

Hällström, J., Bergman, A., Dedeoglu, S., Elg, A-P., Houtzager, E., Klüss, J., Lehtonen, T., Lucas, W., Meisner, J., Merev, A., Nieminen, T., Schmidt, M., Suomalainen, E-P. & Weber, C., 2015, In : IEEE Transactions on Instrumentation and Measurement. 64, 6, p. 1390-1397

Research output: Contribution to journalArticleScientificpeer-review

dividers
high voltages
broadband
Electric potential
electric potential
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
2014
43 Citations (Scopus)

An accurate single-electron pump based on a highly tunable silicon quantum dot

Rossi, A., Tanttu, T., Tan, K. Y., Iisakka, I., Zhao, R., Chan, K. W., Tattamazzi, G. C., Rogge, S., Dzurak, A. S. & Möttönen, M., 2014, In : Nano Letters. 14, 6, p. 3405-3411

Research output: Contribution to journalArticleScientificpeer-review

Silicon
Semiconductor quantum dots
quantum dots
Pumps
pumps
13 Citations (Scopus)

Frequency-comb-referenced mid-infrared source for high-precision spectroscopy

Peltola, J., Vainio, M., Fordell, T., Hieta, T., Merimaa, M. & Halonen, L., 29 Dec 2014, In : Optics Express. 22, 26, p. 32429-32439 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
parametric amplifiers
spectroscopy
nitrous oxides
continuous radiation
methane

Frequency-comb-referenced tunable diode laser spectroscopy and laser stabilization applied to laser cooling

Fordell, T., Wallin, A. E., Lindvall, T., Vainio, M. & Merimaa, M., 2014, In : Applied Optics. 53, 31, p. 7476-7482

Research output: Contribution to journalArticleScientificpeer-review

Laser cooling
laser cooling
Laser spectroscopy
laser spectroscopy
Light sources
12 Citations (Scopus)

Performance of a wideband 200-kV HVDC reference divider module

Hällström, J., Bergman, A., Dedeoglu, S., Elg, A-P., Houtzager, E., Lucas, W., Merev, A., Meisner, J., Schmidt, M., Suomalainen, E-P. & Weber, C., 2014, In : IEEE Transactions on Instrumentation and Measurement. 63, 9, p. 2264-2270 6 p.

Research output: Contribution to journalArticleScientificpeer-review

dividers
high voltages
modules
broadband
Electric potential
2013
23 Citations (Scopus)

Excitation of single quasiparticles in a small superconducting Al island connected to normal-metal leads by tunnel junctions

Maisi, V. F., Lotkhov, S. V., Kemppinen, A., Heimes, A., Muhonen, J. T. & Pekola, J. P., 2013, In : Physical Review Letters. 111, 14, 147001.

Research output: Contribution to journalArticleScientificpeer-review

tunnel junctions
excitation
aluminum
BCS theory
electron phonon interactions
10 Citations (Scopus)

Sensitivity optimization of epitaxial graphene-based gas sensors

Novikov, S., Satrapinski, A., Lebedeva, N. & Iisakka, I., 2013, In : IEEE Transactions on Instrumentation and Measurement. 62, 6, p. 1859-1864 5 p.

Research output: Contribution to journalArticleScientificpeer-review

Chemical sensors
Graphene
graphene
optimization
sensitivity
168 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
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
5 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
2012
11 Citations (Scopus)

Dark-state suppression and optimization of laser cooling and fluorescence in a trapped alkaline-earth-metal single ion

Lindvall, T., Merimaa, M., Tittonen, I. & Madej, A. A., 2012, In : Physical Review A: Atomic, Molecular, and Optical Physics. 86, 3, 033403.

Research output: Contribution to journalArticleScientificpeer-review

laser cooling
alkaline earth metals
retarding
cooling
fluorescence
10 Citations (Scopus)

Luminous efficacy measurement of solid-state lamps

Poikonen, T., Pulli, T., Vaskuri, A., Baumgartner, H., Kärhä, P. & Ikonen, E., 2012, In : Metrologia. 49, 2, p. 135-140 5 p.

Research output: Contribution to journalArticleScientificpeer-review

Electric lamps
Fluxes
Electronic equipment
Harmonic distortion
3 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

Uusi SI-järjestelmä toteuttaa Maxwellin unelman

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

Research output: Contribution to journalArticleProfessional

2011
6 Citations (Scopus)

Comparison of asynchronous sampling correction algorithms for frequency estimation of signals of poor power quality

Lapuh, R., Clarkson, P., Pogliano, U., Hällström, J. K. & Wright, P. S., 2011, In : IEEE Transactions on Instrumentation and Measurement. 60, 7, p. 2235-2241 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Frequency estimation
Power quality
sampling
Sampling
Measurement errors
3 Citations (Scopus)

DC voltage reference based on a square-wave-actuated microelectromechanical sensor

Kaasalainen, J. & Manninen, A., 2011, In : IEEE Transactions on Instrumentation and Measurement. 60, 7, p. 2506-2511 6 p.

Research output: Contribution to journalArticleScientificpeer-review

square waves
direct current
microelectromechanical systems
MEMS
capacitors
14 Citations (Scopus)

Long hold times in a two-junction electron trap

Kemppinen, A., Lotkhov, S. V., Saira, O-P., Zorin, A. B., Pekola, J. P. & Manninen, A. J., 2011, In : Applied Physics Letters. 99, 14, 3 p., 142106.

Research output: Contribution to journalArticleScientificpeer-review

traps
tunnel junctions
resistors
shielding
leakage
17 Citations (Scopus)

Programmable Josephson arrays for impedance measurements

Lee, J., Schurr, J., Nissilä, J., Palafox, L., Behr, R. & Kibble, B. P., 2011, In : IEEE Transactions on Instrumentation and Measurement. 60, 7, p. 2596-2601 6 p.

Research output: Contribution to journalArticleScientificpeer-review

impedance measurement
impedance
Networks (circuits)
Systematic errors
systematic errors
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
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
2010
111 Citations (Scopus)

Hand-grip strength cut points to screen older persons at risk for mobility limitation

Sallinen, J., Stenholm, S., Rantanen, T., Heliövaara, M., Sainio, P. & Koskinen, S., 2010, In : Journal of the American Geriatrics Society. 58, 9, p. 1721-1726 6 p.

Research output: Contribution to journalArticleScientificpeer-review

Mobility Limitation
Hand Strength
Body Mass Index
Anthropometry
Health Surveys
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
2009
12 Citations (Scopus)

Interaction-time-averaged optical pumping in alkali-metal-atom Doppler spectroscopy

Lindvall, T. & Tittonen, I., 9 Sep 2009, In : Physical Review A - Atomic, Molecular, and Optical Physics. 80, 3, 032505.

Research output: Contribution to journalArticleScientificpeer-review

optical pumping
alkali metals
velocity distribution
spectroscopy
atoms