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Selected scientific publications

  1. T. Ahlgren, K. Väkeväinen, J. Räisänen, E. Rauhala and J. Keinonen,
    Range profiles of 6-10 MeV 15 N ions implanted in silicon,
    Appl. Surf. Science, 90 (1995) 419.

  2. K. Nordlund, J. Keinonen, E. Rauhala and T. Ahlgren,
    Range profiles in self-ion-implanted crystalline Si,
    Phys. Rev. B, 52 (1995) 15170.

  3. M. Rajatora, K. Väkeväinen, T. Ahlgren, E. Rauhala, J. Räisänen and K. Rakennus,
    Stopping powers of GaAs for 0.3-2.5 MeV 1 H and 4 He ions,
    Nucl. Instr. and Meth. B, 119 (1996) 457.

  4. Jokinen, J. Keinonen, P. Tikkanen, A. Kuronen, T. Ahlgren and K. Nordlund,
    Comparison of TOF-ERDA and nuclear resonance reaction techniques for range profile measurements of keV-energy implants,
    Nucl. Instr. And Meth. B, 119 (1996) 533.

  5. K. Väkeväinen, M. Rajatora, T. Ahlgren, E. Rauhala and J. Räisänen,
    Exfoliation process of InP caused by 1 H and 4 He ion implantation and its correlation with ion range parameters,
    Appl. Surf. Science, 120 (1997) 30.

  6. E. Vainonen, T. Ahlgren, J. Likonen, P. Haussalo and J. Keinonen,
    Hydrogen migration in diamondlike carbon (DLC) films,
    J. Appl. Phys. 82 (1997) 3791.

  7. T. Ahlgren, J. Likonen, J. Slotte, J. Räisänen, M. Rajatora and J. Keinonen,
    Concentration dependent and independent Si diffusion in ion implanted GaAs,
    Phys. Rev. B, 56 (1997) 4597.

  8. T. Ahlgren, E. Vainonen, J. Likonen and J. Keinonen,
    Concentration dependent deuterium diffusion in diamond-like carbon films,
    Phys. Rev. B, 57 (1998) 9723.

  9. J. Slotte, R. Salonen, T. Ahlgren, J. Räisänen, E. Rauhala and P. Uusimaa,
    Diffusion of Pt in molecular beam epitaxy grown ZnSe,
    Appl. Phys. Lett. 72 (1998) 2553.

  10. T. Ahlgren,
    Identification of Si interstitials in ion implanted GaAs,
    Phys. Rev. Lett. 81 (1998) 842.

  11. R. Salonen, A. Seppälä, T. Ahlgren, E. Rauhala and J. Räisänen,
    Characteristics of PIXE channeling and its application to ZnSe thin films,
    Nucl. Instr. And Meth. B, 145 (1998) 539.

  12. J. Slotte, R. Salonen, T. Ahlgren, E. Rauhala, J. Keinonen, J. Räisänen, P. Uusimaa, A. Salokatve, M. Pessa and A. Laakso,
    Diffusion of Au in ZnSe and its dependence on crystal quality,
    J. Appl. Phys. 85 (1999) 799.

  13. E. Salonen, K. Nordlund, J. Tarus, T. Ahlgren and J. Keinonen,
    Suppression of carbon erosion by hydrogen shielding during high-flux hydrogen bombardment,
    Phys. Rev. B (rapid communications), 60 (1999) 14005.

  14. J. Slotte, A. Laakso, T. Ahlgren, E. Rauhala, R. Salonen, J. Räisänen, A. Simon, I. Uzonyi, A. Kiss and E. Somorjai,
    Influence of surface topography on depth profiles obtained by Rutherford backscattering spectrometry,
    J. Appl. Phys. 87 (2000) 140.

  15. A. Seppälä, R. Salonen, J. Slotte, T. Ahlgren, E. Rauhala and J. Räisänen,
    Lattice sites of diffused gold and platinum in epitaxial ZnSe layers,
    Nucl. Instr. And Meth. B, 161-163 (2000) 520.

  16. L. Khriachtchev, E. Vainonen-Ahlgren, T. Sajavaara, T. Ahlgren and J. Keinonen,
    Stability of Si-C films prepared by a pulsed arc discharge method: Thermal treatment and heavy-ion irradiation,
    J. Appl. Phys. 88 (2000) 2118.

  17. E. Vainonen-Ahlgren, T. Ahlgren, J. Likonen, S. Lehto, J. Keinonen, W. Li and J. Haapamaa,
    Identification of vacancy charge states in diffusion of arsenic in germanium,
    Appl. Phys. Lett. 77 (2000) 690.

  18. E. Vainonen-Ahlgren, T. Ahlgren, J. Likonen, S. Lehto, T. Sajavaara, W. Rydman, J. Keinonen, and C. H. Wu,
    Deuterium diffusion in silicon doped diamondlike carbon films,
    Phys. Rev. B, 63 (2001) 045406.

  19. Wei Li, Markus Pessa, Tommy Ahlgren and James Dekker,
    Origin of improved luminescence efficiency after annealing of Ga(In)NAs materials grown by molecular-beam epitaxy,
    Appl. Phys. Lett. 79 (2001) 1094.

  20. T. Ahlgren and E. Rauhala,
    Stopping cross sections for 0.3-2.5 MeV protons in GaN and InP,
    J. Appl. Phys. 90 (2001) 4871.

  21. P. Laukkanen, S. Lehkonen, P. Uusimaa, M. Pessa, A. Seppälä, T. Ahlgren and E. Rauhala,
    Emission studies of InGaN layers and LEDs grown by plasma-assisted MBE,
    J. Crystal Growth, 230 (2001) 503.

  22. T. Ahlgren, E. Vainonen-Ahlgren, J. Likonen, W. Li and M. Pessa,
    Concentration of interstitial and substitutional nitrogen in GaN_(x)As_(1-x) ,
    Appl. Phys. Lett. 80 (2002) 2314.

  23. E. Vainonen-Ahlgren, E. Aro, T. Ahlgren, L. Khriachtchev, J. Marles, S. Haukka and M. Tuominen,
    Atomic layer chemical vapour deposition of hafnium and zirconium silicate thin films,
    Computational Materials Science, 27 (2003) 65.

  24. P. Pusa, T. Ahlgren and E. Rauhala,
    Fast Monte Carlo simulation for elastic ion backscattering,
    Nucl. Instr. And Meth. B, 219-220 (2004) 95.

  25. K. Heinola, T. Ahlgren, W. Rydman, J. Likonen, L. Khriachtchev, J. Keinonen and C. H. Wu,
    Effect of Hydrogen on Flaking of Carbon Films on Mo and W,
    Physica Scripta, T108 (2004) 63.

  26. T. Ahlgren, K. Heinola, E. Vainonen-Ahlgren, J. Likonen and J. Keinonen,
    Quantification of deuterium irradiation induced defect concentrations in tungsten,
    Nucl. Instr. And Meth. B, 249 (2006) 436.

  27. K. Heinola, T. Ahlgren, E. Vainonen-Ahlgren, J. Likonen and J. Keinonen,
    D irradiation induced defect concentrations in W,
    Physica Scripta, T128 (2007) 91.

  28. T. Kurki-Suonio, V. Hynönen, T. Ahlgren, K. Nordlund, K. Sugiyama, R. Dux and the ASDEX Upgrade Team,
    Fusion tritons and plasma-facing components in a fusion reactor,
    Europhysics Letters, 78 (2007) 65 002.

  29. L. Sun, A. V. Krasheninnikov, T. Ahlgren, K. Nordlund and F. Banhart,
    Plastic deformation of single nanometer-sized crystals,
    Phys. Rev. Lett. 101 (2008) 156101.

  30. K. Heinola and T. Ahlgren,
    Diffusion of hydrogen in bcc tungsten studied with first principle calculations,
    J. Appl. Phys. 107 (2010) 113531.

  31. T. Ahlgren, K. Heinola, N. Juslin and A. Kuronen,
    Bond-order potential for point and extended defect simulations in tungsten,
    J. Appl. Phys. 107 (2010) 033516.

  32. K. Heinola, T. Ahlgren,
    First-principles study of H on the reconstructed W (100) surface,
    Phys. Rev. B, 81 (2010) 073409.

  33. K. Heinola, T. Ahlgren, K. Nordlund and J. Keinonen,
    Hydrogen interaction with point defects in tungsten,
    Phys. Rev. B, 82 (2010) 094102.

  34. T. Nikitin, K. Aitola, S. Novikov, M. Räsänen, R. Velagapudi, J. Sainio, J. Lahtinen, K. Mizohata, T. Ahlgren, and L. Khriachtchev,
    Optical and structural properties of silicon-rich silicon oxide films: Comparison of ion implantation and molecular beam deposition methods,
    Phys. Status Solidi A, 9 (2011) 2176.

  35. M. Rieth, J. L. Boutard, S. L. Dudarev, T. Ahlgren, S. Antusch, et al.,
    Review on the EFDA Programme on Divertor Materials Technology and Science,
    J. Nucl. Mater. 417 (2011) 463.

  36. T. Ahlgren, K. Heinola, K. Vörtler, and J. Keinonen,
    Simulation of irradiation induced deuterium trapping in tungsten,
    Journal of Nuclear Materials, 427 (2012) 152.

  37. M. Rieth and S.L. Dudarev and S.M. Gonzalez de Vicente and J. Aktaa and T. Ahlgren et. al,
    Recent progress in research on tungsten materials for nuclear fusion applications in Europe,
    Journal of Nuclear Materials, 432 (2013) 482.

  38. K. Heinola, T. Ahlgren,
    Hydrogen retention to impurities in tungsten: A multi-scale study,
    Journal of Nuclear Materials, 438 (2013) 1001.

  39. M. Rieth and S.L. Dudarev and S.M. Gonzalez de Vicente and J. Aktaa and T. Ahlgren et. al,
    A brief summary of the progress on the EFDA tungsten materials program,
    Journal of Nuclear Materials, 442 (2013) 173.

  40. Yi-Nan Liu, T. Ahlgren, L. Bukonte, K. Nordlund, Xiaolin Shu, Yi Yu, Xiao-Chun Li, and Guang-Hong Lu,
    Mechanism of vacancy formation induced by hydrogen in tungsten,
    AIP Advances, 3 (2013) 122111.

  41. L. Bukonte, T. Ahlgren and K. Heinola,
    Modelling of monovacancy diffusion in W over wide temperature range,
    J. Appl. Phys. 115 (2014) 123504.

  42. K. Nordlund, C. Björkas, T. Ahlgren, A. Lasa and A. E. Sand,
    Multiscale modelling of plasma-wall interactions in fusion reactor conditions,
    J. Phys. D: Appl. Phys. 47 (2014) 224018.

  43. T. Ahlgren and L. Bukonte,
    Concentration dependent hydrogen diffusion in tungsten,
    Journal of Nuclear Materials, 479 (2016) 195.

  44. L. Bukonte, T. Ahlgren and K. Heinola,
    Thermodynamics of impurity-enhanced vacancy formation in metals,
    J. Appl. Phys. 121 (2017) 045102.

  45. K. Heinola, J. Likonen, T. Ahlgren, S. Brezinsek, G. De Temmerman, I. Jepu, G.F. Matthews, R.A. Pitts, A. Widdowson and JET Contributors,
    Long-term fuel retention and release in JET ITER-Like Wall at ITER-relevant baking temperatures,
    Nuclear Fusion 58 (2017) 086024.

  46. X. Litaudon, S. Abduallev, M. Abhangi, P. Abreu, M. Afzal, K.M. Aggarwal, T. Ahlgren, J.H. Ahn, L. Aho-Mantila, N. Aiba ... ,
    Overview of the JET results in support to ITER,
    Nuclear Fusion 57 (2017) 102001.

  47. T. Ahlgren and L. Bukonte,
    Sink strength simulations using the Monte Carlo method: applied to spherical traps,
    Journal of Nuclear Materials, 496 (2017) 66.

  48. K. Heinola, F. Djurabekova and T. Ahlgren,
    On the stability and mobility of di-vacancies in tungsten,
    Nuclear Fusion 58 (2018) 026004.

  49. K. Heinola, T. Ahlgren, S. Brezinsek, T. Vuoriheimo, S. Wiesen, JET Contributors,
    Modelling of the effect of ELMs on fuel retention at the bulk W divertor of JET,
    Nuclear Materials and Energy 19 (2019) 397.

  50. Tommy Ahlgren, Pasi Jalkanen, Kenichiro Mizohata, Vladimir Tuboltsev, Jyrki Raisanen, Kalle Heinola and Pertti Tikkanen,
    Hydrogen isotope exchange in tungsten during annealing in hydrogen atmosphere,
    Nuclear Fusion 59 (2019) 026016.

  51. J. Heikinheimo, K. Mizohata, J. Räisänen, T. Ahlgren, N. Catarino, E. Alves, and F. Tuomisto,
    Direct observation of mono-vacancy and self-interstitial recovery in tungsten,
    APL Mater. 7 (2019) 021103.

  52. Tommy Ahlgren and Kalle Heinola,
    Improvements to the Sink Strength Theory Used in Multi-Scale Rate Equation Simulations of Defects in Solids,
    Materials 13 (2020) 2621.

  53. O. Lindblom, T. Ahlgren and K. Heinola,
    Molecular dynamics simulations of hydrogen isotope exchange in tungsten vacancies,
    Nuclear Materials and Energy 29 (2021) 101099.