J. Likonen

Publication List Details

Period

1999 - 2009

Number

107

Co-Authors

Investigation of the Annealing Behaviour of Implanted Nitrogen in n-type InP (2007)

J. Likonen, K. Vkevinen, T. Ahlgren, J. Risnen, E. Rauhala, J. Keinonen

Concentration profiles of nitrogen in vacuum-annealed n-type single crystal (100) InP implanted with 1x10

Observation of Ga vacancies and negative ions in undoped and Mg-doped GaN bulk crystals (2007)

Saarinen Nissilak Oila, K. Saarinen, J. Nissilak, J. Oila, V. Ranki, M. Hakala, ...

Gallium vacancies and negative ions are observed in GaN bulk crystals by applying positron lifetime spectroscopy. The concentration of Ga vacancies decreases with increasing Mg doping, as expected...

J. Likonen (2007)

Ahlgren Slotte, J. Likonen, T. Ahlgren, J. Slotte, J. Keinonen

this paper is to explain high concentration Si diffusion in GaAs. The implantation dose used in this study is considerably higher than in earlier studies and the annealings also extend to lower...

R&D on full tungsten divertor and beryllium wall for JET ITER-like wall project (2007)

Hirai, T., Maier, H., Rubel, M., Mertens, Ph., Neu, R., Gauthier, E., ...

The ITER reference materials have been tested separately in tokamaks, plasma simulators, ion beams and high heat flux test beds. In order to perform a fully integrated material test JET has launched...

Tungsten and beryllium armour development for the JET ITER-like wall project (2007)

Maier, H., Hirai, T., Rubel, M., Mertens, Ph., Greuner, H., Hopf, Ch., ...

For the ITER-like wall project at JET, the present main chamber CFC tiles will be exchanged with Be tiles and in parallel a fully tungsten-clad divertor will be prepared. Three R&D programmes were...

Erosion and deposition in the JET MkII-SRP divertor (2007)

Coad, J. P., Andrew, P., Erents, S. K., Hole, D. E., Likonen, J., Mayer, M., ...

Carbon-13 labelled methane was injected into the outer divertor during a series of H-mode discharges on the last day of operations with the JET MkII-SRP divertor. Tiles from around the vessel were...

Gas balance and fuel retention in fusion devices (2007)

T. Loarer, C. Brosset, J. Bucalossi, P. Coad, G. Esser, J. Hogan, ...

The evaluation of hydrogenic retention in present tokamaks is of crucial importance to estimate the expected tritium (T) vessel inventory in ITER, limited from safety considerations to 350 g. In the...

Overview of ASDEX Upgrade results-development of integrated operating scenarios for ITER (2005)

Günter, S., Angioni, C., Apostoliceanu, M., Atanasiu, C., Balden, M., Becker, G., ...

This article based on the 2004 Fusion Energy Conference contribution (Vilamoura, Portugal, 1-6 November 2004)

Material erosion and migration in tokamaks (2005)

Pitts, R. A., Coad, J. P., Coster, D. P., Federici, G., Fundamenski, W., Horacek, J., ...

The issue of first wall and divertor target lifetime represents one of the greatest challenges facing the successful demonstration of integrated tokamak burning plasma operation, even in the case of...

INSTITUTE OF PHYSICS PUBLISHING PLASMA PHYSICS AND CONTROLLED FUSION Plasma Phys. Control. Fusion 47 (2005) B303–B322 doi:10.1088/0741-3335/47/12B/S22 Material erosion and migration in tokamaks (2005)

R A Pitts, J P Coad, D P Coster, G Federici, W Fundamenski, J Horacek, ...

The issue of first wall and divertor target lifetime represents one of the greatest challenges facing the successful demonstration of integrated tokamak burning plasma operation, even in the case of...

Fusion technology research and development at JET. (2004)

Ciattaglia, S., Bekris, N., Bell, A.C., Braet, J., Brichard, B., Caldwell-Nichols, C., ...

20th IEEE/NPSS Symp.on Fusion Engineering (SOFE), San Diego, Calif., October 14-17, 2003

Tritium studies within JET fusion technology workprogramme. (2004)

Rosanvallon, S., Braet, J., Coad, P., Cristescu, I., Grisolia, C., Likonen, J., ...

7th Internat.Conf.on Tritium Science and Technology, Baden-Baden, September 12-17, 2004

Tungsten coating on JET divertor tiles for erosion/deposition studies (2003)

Lehto, S., Likonen, J., Coad, J. P., Ahlgren, T., Hole, D. E., Mayer, M., ...

Six Joint European Torus (JET) divertor tiles were coated with tungsten marker stripes for erosion/deposition studies. The average thickness was 3.4 μm and the film was uniform within 5% across and...

Tritium related studies at the JET facilities. (2003)

Lässer, R., Bekris, N., Bell, A.C., Caldwell-Nichols, C., Cristescu, I., Ciattaglia, S., ...

Proc.of the 22nd Symp.on Fusion Technology (SOFT), Helsinki, SF, September 9-13, 2002

The deactivation of nitrogen acceptors in ... and ... studied by combining positron annihilation, SIMS, and CV measurements (1999)

Cv Measurements, J. Oila, K. Saarinen, P. Hautojärvi, T. Laine, M. Pessa, ...

We show that quantitative information on the electrical deactivation of doping can be obtained by combining the results of positron annihilation, secondary ion-mass spectrometry and...