Photo of Dr Petteri Pusa

Dr Petteri Pusa

Research Associate Physics

    Publications

    Selected Publications

    1. An improved limit on the charge of antihydrogen from stochastic acceleration (Journal article - 2016)
    2. An experimental limit on the charge of antihydrogen (Journal article - 2014)
    3. "Trapped antihydrogen" (Journal article - 2010)
    4. Confinement of antihydrogen for 1000 seconds (Journal article - 2011)

    2018

    Observation of the 1S–2P Lyman-a transition in antihydrogen (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Capra, A., Carruth, C., . . . Wurtele, J. S. (2018). Observation of the 1S–2P Lyman-a transition in antihydrogen. NATURE, 561(7722), 211-215. doi:10.1038/s41586-018-0435-1

    DOI: 10.1038/s41586-018-0435-1

    Characterization of the 1S-2S transition in antihydrogen (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Capra, A., Carruth, C., . . . Wurtele, J. S. (2018). Characterization of the 1S-2S transition in antihydrogen. NATURE, 557, 71-75. doi:10.1038/s41586-018-0017-2

    DOI: 10.1038/s41586-018-0017-2

    Observation of the hyperfine spectrum of antihydrogen (vol 548, pg 66, 2017) (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Butler, E., Capra, A., . . . Wurtele, J. S. (2018). Observation of the hyperfine spectrum of antihydrogen (vol 548, pg 66, 2017). NATURE, 553(7689), 530. doi:10.1038/nature24663

    DOI: 10.1038/nature24663

    Enhanced Control and Reproducibility of Non-Neutral Plasmas (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Capra, A., Carruth, C., . . . Collaboration, A. L. P. H. A. (2018). Enhanced Control and Reproducibility of Non-Neutral Plasmas. PHYSICAL REVIEW LETTERS, 120(2). doi:10.1103/PhysRevLett.120.025001

    DOI: 10.1103/PhysRevLett.120.025001

    2017

    Antihydrogen accumulation for fundamental symmetry tests (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Butler, E., Capra, A., . . . Wurtele, J. S. (2017). Antihydrogen accumulation for fundamental symmetry tests. NATURE COMMUNICATIONS, 8. doi:10.1038/s41467-017-00760-9

    DOI: 10.1038/s41467-017-00760-9

    Observation of the hyperfine spectrum of antihydrogen (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Butler, E., Capra, A., . . . Wurtele, J. S. (2017). Observation of the hyperfine spectrum of antihydrogen. NATURE, 548(7665), 66-+. doi:10.1038/nature23446

    DOI: 10.1038/nature23446

    Observation of the 1S-2S transition in trapped antihydrogen (Journal article)

    Ahmadi, M., Alves, B. X. R., Baker, C. J., Bertsche, W., Butler, E., Capra, A., . . . Wurtele, J. S. (2017). Observation of the 1S-2S transition in trapped antihydrogen. Nature, 541, 506-510. doi:10.1038/nature21040

    DOI: 10.1038/nature21040

    2016

    Limit on the electric charge of antihydrogen (Journal article)

    Capra, A., Amole, C., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., . . . Charman, A. E. (2016). Limit on the electric charge of antihydrogen. HYPERFINE INTERACTIONS, 238. doi:10.1007/s10751-016-1382-6

    DOI: 10.1007/s10751-016-1382-6

    Fundamental tests of physics with antihydrogen at ALPHA (Conference Paper)

    Silveira, D. M., Cesar, C. L., Sacramento, R. L., Ahmadi, M., Nolan, P., Pusa, P., . . . Thompson, R. I. (2016). Fundamental tests of physics with antihydrogen at ALPHA. In Optics InfoBase Conference Papers. doi:10.1364/LAOP.2016.LTu3B.1.pdf

    DOI: 10.1364/LAOP.2016.LTu3B.1.pdf

    An improved limit on the charge of antihydrogen from stochastic acceleration (Journal article)

    Ahmadi, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Carruth, C., . . . Zhmoginov, A. I. (2016). An improved limit on the charge of antihydrogen from stochastic acceleration. Nature, 529, 373-376. doi:10.1038/nature16491

    DOI: 10.1038/nature16491

    2015

    Antiproton cloud compression in the ALPHA apparatus at CERN (Journal article)

    Gutierrez, A., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Burrows, C., Butler, E., . . . Zhmoginov, A. I. (2015). Antiproton cloud compression in the ALPHA apparatus at CERN. HYPERFINE INTERACTIONS, 235(1-3), 21-28. doi:10.1007/s10751-015-1202-4

    DOI: 10.1007/s10751-015-1202-4

    2014

    An experimental limit on the charge of antihydrogen (Journal article)

    Amole, C., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., . . . Charman, A. E. (2014). An experimental limit on the charge of antihydrogen. NATURE COMMUNICATIONS, 5. doi:10.1038/ncomms4955

    DOI: 10.1038/ncomms4955

    In situ electromagnetic field diagnostics with an electron plasma in a Penning-Malmberg trap (Journal article)

    Amole, C., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., . . . Wurtele, J. S. (2014). In situ electromagnetic field diagnostics with an electron plasma in a Penning-Malmberg trap. NEW JOURNAL OF PHYSICS, 16. doi:10.1088/1367-2630/16/1/013037

    DOI: 10.1088/1367-2630/16/1/013037

    The ALPHA antihydrogen trapping apparatus (Journal article)

    Amole, C., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., . . . Collaboration, A. L. P. H. A. (2014). The ALPHA antihydrogen trapping apparatus. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 735, 319-340. doi:10.1016/j.nima.2013.09.043

    DOI: 10.1016/j.nima.2013.09.043

    2012

    Antihydrogen and mirror-trapped antiproton discrimination: Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap (Journal article)

    Amole, C., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., . . . Wurtele, J. S. (n.d.). Antihydrogen and mirror-trapped antiproton discrimination: Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap. New J. Phys., 14, 015010. doi:10.1088/1367-2630/14/1/015010.

    DOI: 10.1088/1367-2630/14/1/015010.

    2011

    Confinement of antihydrogen for 1000 seconds (Journal article)

    Collaboration, A. L. P. H. A., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., . . . Yamazaki, Y. (n.d.). Confinement of antihydrogen for 1000 seconds. Nature Phys., 7, 558-564. doi:10.1038/nphys2025

    DOI: 10.1038/nphys2025

    Towards Antihydrogen Trapping and Spectroscopy at ALPHA (Journal article)

    Butler, E., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., . . . Yamazaki, Y. (n.d.). Towards Antihydrogen Trapping and Spectroscopy at ALPHA. doi:10.1007/s10751-011-0299-3

    DOI: 10.1007/s10751-011-0299-3

    Autoresonant excitation of antiproton plasmas (Journal article)

    Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Butler, E., . . . Yamazaki, Y. (2011). Autoresonant excitation of antiproton plasmas.

    Centrifugal separation and equilibration dynamics in an electron-antiproton plasma (Journal article)

    Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Butler, E., . . . Yamazaki, Y. (n.d.). Centrifugal separation and equilibration dynamics in an electron-antiproton plasma. Phys. Rev. Lett., 106, 145001. doi:10.1103/PhysRevLett.106.145001

    DOI: 10.1103/PhysRevLett.106.145001

    Cernissä vangittiin antimateriaa - suomalaiset mukana tutkimassa (Journal article)

    Pusa, P., & Erikkson, S. (2011). Cernissä vangittiin antimateriaa - suomalaiset mukana tutkimassa. YLE, 1. Retrieved from http://yle.fi/

    Search For Trapped Antihydrogen (Journal article)

    Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Bray, C. C., . . . Yamazaki, Y. (n.d.). Search For Trapped Antihydrogen. Physics Letters B, 695, 95-104. doi:10.1016/j.physletb.2010.11.004

    DOI: 10.1016/j.physletb.2010.11.004

    2010

    Antihydrogen formation dynamics in a multipolar neutral anti-atom trap (Journal article)

    Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C., Butler, E., Cesar, C. L., . . . Yamazaki, Y. (n.d.). Antihydrogen formation dynamics in a multipolar neutral anti-atom trap. Physics Letters B, 685, 141. doi:10.1016/j.physletb.2010.01.066

    DOI: 10.1016/j.physletb.2010.01.066

    "Trapped antihydrogen" (Journal article)

    Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Butler, E., . . . Yamazaki, Y. (2010). "Trapped antihydrogen". Nature, V.468, 673.

    Antihydrogen formation dynamics in a multipolar neutral anti-atom trap (Journal article)

    Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C., Butler, E., Cesar, C. L., . . . Yamazaki, Y. (2010). Antihydrogen formation dynamics in a multipolar neutral anti-atom trap.

    Search for trapped antihydrogen (Journal article)

    Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Bray, C. C., . . . Yamazaki, Y. (2010). Search for trapped antihydrogen.

    2009

    Antihydrogen physics at ALPHA/CERN", (Journal article)

    Cesar, C. L., Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C. C., Butler, E., . . . Yamazaki, Y. (2009). Antihydrogen physics at ALPHA/CERN",.

    Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector", (Journal article)

    Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C. C., Butler, E., Cesar, C. L., . . . Yamazaki, Y. (2009). Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector",.

    Recent progress in CERN RD39: radiation hard cryogenic silicon detectors for applications in LHC experiments and their future upgrades", (Journal article)

    Tuominen, E., Anbinderis, P., Anbinderis, T., Bates, R., de Boer, W., Borchi, E., . . . Zavrtanik, M. (2009). Recent progress in CERN RD39: radiation hard cryogenic silicon detectors for applications in LHC experiments and their future upgrades",.

    etic multiple induced zero-rotation frequency bounce-resonant loss in a penningmalmberg trap used for antihydrogen trapping", (Journal article)

    Andresen, G. B., Bertsche, W., Bray, C. C., Butler, E., Cesar, C. L., Chapman, S., . . . Yamazaki, Y. (2009). etic multiple induced zero-rotation frequency bounce-resonant loss in a penningmalmberg trap used for antihydrogen trapping",.

    2008

    A novel antiproton radial diagnostic based on octupole induced ballistic loss (Journal article)

    Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C. C., Butler, E., Cesar, C. L., . . . Yamazaki, Y. (2008). A novel antiproton radial diagnostic based on octupole induced ballistic loss.

    Alpha Antihydrogen Experiment (Journal article)

    Collaboration, A. L. P. H. A., Fujiwara, M. C., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., . . . Yamazaki, Y. (n.d.). Alpha Antihydrogen Experiment. Proceedings of the Fifth Meeting on CPT and Lorentz Symmetry, Ed. V.A. Kostelecky, pp. 50-54, World Scientific (2011). Retrieved from http://arxiv.org/abs/1104.4661v1

    Compression of antiproton clouds for antihydrogen trapping (Journal article)

    Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C. C., Butler, E., Cesar, C. L., . . . Yamazaki, Y. (2008). Compression of antiproton clouds for antihydrogen trapping.

    Diffusion of beryllium in Ge and Si-Ge alloys", (Journal article)

    Koskelo, O., Pusa, P., Räisänen, J., Köster, U., & Riihimäki, I. (2008). Diffusion of beryllium in Ge and Si-Ge alloys",.

    Diffusion properties of Ga in Si1-xGex alloys (Journal article)

    Riihimäki, I., Virtanen, A., Kettunen, H., Pusa, P., & Räisänen, J. (2008). Diffusion properties of Ga in Si1-xGex alloys.

    Elastic interactions and diffusion of Sn in Si1-xGex system", (Journal article)

    Riihimäki, I., Virtanen, A., Kettunen, H., Pusa, P., Laitinen, P., Räisänen, J., & the ISOLDE Collaboration. (2008). Elastic interactions and diffusion of Sn in Si1-xGex system",.

    Particle Physics Aspects of Antihydrogen Studies with ALPHA at CERN (Journal article)

    Collaboration, A. L. P. H. A., Fujiwara, M. C., Andresen, G. B., Bertsche, W., Bowe, P. D., Bray, C. C., . . . Yamazaki, Y. (n.d.). Particle Physics Aspects of Antihydrogen Studies with ALPHA at CERN. AIP Conf.Proc., 1037, 208-220. doi:10.1063/1.2977840

    DOI: 10.1063/1.2977840

    Si self-diffusion in cubic B20-structured FeSi (Journal article)

    Riihimäki, I., Virtanen, A., Pusa, P., Salamon, M., Mehrer, H., & Räisänen, J. (2008). Si self-diffusion in cubic B20-structured FeSi.

    2007

    Low-temperature TCT characterization of heavily proton irradiated p-type magnetic Czochralski silicon detectors", (Journal article)

    Härkönen, J., Tuovinen, E., Luukka, P., Kassamakov, I., Autioniemi, M., Tuominen, E., . . . Li, Z. (2007). Low-temperature TCT characterization of heavily proton irradiated p-type magnetic Czochralski silicon detectors",.

    Recent developments of CERN RD39 cryogenic tracking detectors collaboration: CERN RD39 Collaboration (Journal article)

    Rouby, X., Anbinderis, P., Anbinderis, T., D'Ambrosio, N., Bates, R., de Boer, W., . . . Zavrtanik, M. (2007). Recent developments of CERN RD39 cryogenic tracking detectors collaboration: CERN RD39 Collaboration.

    Setup for irradiation and characterization of materials and Si particle detectors at cryogenic temperatures (Journal article)

    Väyrynen, S., Pusa, P., Sane, P., Tikkanen, P., Räisänen, J., Kuitunen, K., . . . Tuovinen, E. (2007). Setup for irradiation and characterization of materials and Si particle detectors at cryogenic temperatures.

    The cryogenic transient current technique (C-TCT) measurement setup of CERN RD39 collaboration (Journal article)

    Härkönen, J., Eremin, V., Verbitskaya, E., Czellar, S., Pusa, P., Li, Z., & Niinikosk, T. O. (2007). The cryogenic transient current technique (C-TCT) measurement setup of CERN RD39 collaboration.

    Vacancy-impurity complexes and diffusion of Ga and Sn in intrinsic and p-doped germanium", (Journal article)

    Riihimäki, I., Virtanen, A., Rinta-Anttila, S., Pusa, P., & Räisänen, J. (2007). Vacancy-impurity complexes and diffusion of Ga and Sn in intrinsic and p-doped germanium",.

    2004

    Alpha-proton elastic scattering cross sections for ERDA in the resonance region (Journal article)

    Pusa, P., Rauhala, E., Gurbich, A., & Nurmela, A. (2004). Alpha-proton elastic scattering cross sections for ERDA in the resonance region.

    Fast Monte Carlo simulation for elastic ion backscattering (Journal article)

    Pusa, P., Ahlgren, T., & Rauhala, E. (2004). Fast Monte Carlo simulation for elastic ion backscattering.

    2003

    Iodine - carbon elastic scattering system near the Coulomb barrier (Journal article)

    Pusa, P., Rauhala, E., Alanko, T., & Räisänen, J. (2003). Iodine - carbon elastic scattering system near the Coulomb barrier. J.Appl.Phys.

    2002

    4He elastic scattering near the Coulomb barrier and optical model parameters (Journal article)

    Nurmela, A., Pusa, P., Rauhala, E., & Räisänen, J. (2002). 4He elastic scattering near the Coulomb barrier and optical model parameters. J.Appl.Phys.

    2000

    Evaporative Cooling of Antiprotons to Cryogenic Temperatures (Journal article)

    Collaboration, A. L. P. H. A., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., . . . Yamazaki, Y. (n.d.). Evaporative Cooling of Antiprotons to Cryogenic Temperatures. Phys.Rev.Lett., 105, 013003. doi:10.1103/PhysRevLett.105.013003

    DOI: 10.1103/PhysRevLett.105.013003

    Forward and Backscattering Cross Sections and Optical Model Parameters for 7Li + Ni and 11B + Ni Systems", (Journal article)

    Nurmela, A., Pusa, P., Rauhala, E., & Räisänen, J. (2000). Forward and Backscattering Cross Sections and Optical Model Parameters for 7Li + Ni and 11B + Ni Systems",. NIMB.