Curriculum Vitae

Personal information

• Last Name: Kalvas
• First Names: Taneli Ville Matias
• Work address: Department of Physics, P. O. Box 35 (YFL), FIN-40014 University of Jyväskylä, Finland
• Home address: Orakkaantie 2, 40640 Jyväskylä, Finland
• 
• Phone: +358-44-314-1602
• Date and Place of Birth: March 15, 1981, Tampere, Finland
• Gender: Male
• Nationality: Finnish
• Family: Married to Kaisa Elina Kalvas, daughters Ronja Katariina Kalvas and Milla Annina Kalvas
• WWW: http://users.jyu.fi/~tvkalvas/

Formal Education

• Ph.D. degree, University of Jyväskylä, Department of Physics. Specialization on ion sources and computational ion optics, 2013.
• Master of Science, University of Jyväskylä, Department of Physics. Majoring in physics, minoring studies in mathematics and computer science, 2004.

Formal Trainings

• University pedagogical studies, 10 ECTS, University of Jyväskylä, 1 Sep - 28 Nov, 2017.
• CERN Accelerator School, "Numerical Methods for Analysis, Design and Modelling of Particle Accelerators", Thessaloniki, Greece, 11 - 23 Nov 2018.
• "COMSOL intro course", Helsinki, Finland, 10 Jun 2015.
• "MCNP/MCNPX intermediate workshop", Instituto Tecnologico e Nuclear, Lisbon, Portugal, 12 - 16 May, 2008.
• "Erasmus intensive programme on ion beam, photon and nuclear methods in studies of nanostructured materals", Zakopane, Poland, 10 - 19 May, 2007.

Language skills

• Finnish: native language.
• English: proficient level (C1)
• Swedish: basic level (A2)
• German: basic level (A1)

Professional Experience

• 2018- Senior researcher, Department of Physics, University of Jyväskylä. Research, development and daily operations of accelerator technology, including ion sources, beam lines and cyclotrons. Mentoring and teaching of students.
• 2014-2017 Postdoc researcher, Department of Physics, University of Jyväskylä. Development of a new 18 GHz ECR ion source HIISI for the Accelerator laboratory. Physics and engineering design. Modelling.
• 2007-2013 Ph.D. student, Department of Physics, University of Jyväskylä. H- and H+ ion source development, development of computational tools for modelling negative hydrogen ion source extraction systems.
• 2004-2006 Visiting researcher, Plasma and Ion Source Technology Group at the Lawrence Berkeley National Laboratory, California, USA. Ion source development for neutron generators.

Grants

• Emil Aaltonen Foundation, 5000 euro, "Development of a microwave ion source for a neutron generator", 2009.
• Vilho, Yrjö and Kalle Väisälä Foundation, 14000 euro, "Development of ion sources for neutron generators", 2006.
• Vilho, Yrjö and Kalle Väisälä Foundation, 14000 euro, "Development of ion sources for neutron generators", 2005.
• Emil Aaltonen Foundation, 7000 euro, "Development of ion sources for neutron generators", 2004.

Teaching and mentoring experience

• Lecturer, Department of Physics, University of Jyväskylä, 2nd year course, "Introduction to computing for physicists", 2 ECTS, 2015-2017.
• Lecturer, Department of Physics, University of Jyväskylä, 2nd year course, "Numerical methods in physics", 4 ECTS, 2014-2018.
• Lecturer, Jyväskylä Summer School, University of Jyväskylä, postgraduate course, "Computational ion optics with IBSimu", 4 ECTS, 2015.
• University teacher, Department of Physics, University of Jyväskylä, teamwork to produce YouTube videos for "Electrostatics" and "Electromagnetics" courses, 35 videos in total, 2011.
• Teaching assistant, Department of Physics, University of Jyväskylä, 2nd year courses, "Electrostatics" and "Electromagnetics", 4+6 ECTS, 2011.
• Teaching assistant, Department of Physics, University of Jyväskylä, master level course, "Measuring techniques", 8 ECTS, 2007-2008.
• Teaching assistant, Department of Physics, University of Jyväskylä, 1st year course, "Mathematical methods", 8 ECTS, 2001-2003.

Positions of Responsibility

• Member of the scientific program committee of International Conference on Ion Sources.
• Manager of Young Researcher Seminar, Department of Physics, Jyväskylä.
• Recent referee for New Journal of Physics, Nuclear Instruments and Methods B, Review of Scientific Instruments and Journal of Vacuum Science \& Technology B.

Patents and Innovations

• The Regents of the University of California, S. K. Hahto, K. N. Leung, T. Kalvas, "5 ns or less neutron and gamma pulse generator", US Patent 20100025573, 2007.
• T. Kalvas, O. Tarvainen, H. Koivisto and J. Tuunanen, RF ion source technology licenced to Dehnel - Particle accelerator components and engineering inc., 28 Jul 2011.
• T. Kalvas, O. Tarvainen, "Cube-ECRIS permanent magnet ECR ion source", Reported innovation, University of Jyväskylä, 2017.

Other Contributions to Science

I have written and published a computer code, "Ion Beam Simulator" or "IBSimu", for ion optics, plasma extraction and space charge dominated ion beam transport using Vlasov iteration. The code is available as open source to enable reviewing and to promote scientific transparency (http:://ibsimu.sourceforge.net/). The code has reached a high status in the field. In addition to the 35 references to the paper (T. Kalvas et al., Rev. Sci. Instrum. 81, 02B703) at least 5 Ph.D. theses have strongly relied on IBSimu modelling.

Selected Peer-reviewed Publications

According to Web of Science I have 53 publications. The average number of citations per item is 6.4 and the h-index is 10. A selection of 10 peer-reviewed publications are listed below:

• T. Kalvas, O. Tarvainen, T. Ropponen, O. Steczkiewicz, J. Ärje, and H. Clark, "IBSIMU: A three-dimensional simulation software for charged particle optics", Rev. Sci. Instrum. 81, 02B703 (2010)
• T. Kalvas, R. F. Welton, O. Tarvainen, B. X. Han, M. P. Stockli, "Simulation of H- ion source extraction systems for the Spallation Neutron Source with Ion Beam Simulator", Rev. Sci. Instrum. 83, 02A705 (2012).
• F. Moens, T. Kalvas, S. Van Steenberge, D. Depla, "Effect of space charge on the negative oxygen flux during reactive sputtering", J. Physics D 11, 115201 (2017).
• V. Toivanen, T. Kalvas, "Double einzel lens extraction for the JYFL 14 GHz ECR ion source designed with IBSimu", JINST 8, P05003 (2013).
• O. Midttun, T. Kalvas, M. Kronberger, J. Lettry, H. Pereira, C. Schmitzer, R. Scrivens, "A new extraction system for the Linac4 H- ion source", Rev. Sci. Instrum. 83, 02B710 (2012).
• T. Kalvas, A. Javanainen, H. Kettunen, et al., "Application and development of ion-source technology for radiation-effects testing of electronics", Nucl. Instrum. Meth. B 406, 205 (2017).
• V. Kleschch, E. A. Smolnikova, A. S. Orekhov, T. Kalvas, O. Tarvainen, et. al. "Nano-graphite cold cathodes for electric solar wind sail", Carbon 81, 132-136 (2015).
• T. Kalvas, O. Tarvainen, J. Komppula, H. Koivisto, J. Tuunanen, et al., "Power efficiency improvements with the radio frequency H- ion source", Rev. Sci. Instrum. 87, 02B102 (2016).
• D. Mansfeld, I. Izotov, V. Skalyga, O. Tarvainen, T. Kalvas, H. Koivisto, J. Laulainen, "Dynamic regimes of cyclotron instability in the afterglow mode of minimum-B electron cyclotron resonance ion source plasma", Plasma Physics and Controlled Fusion, 58, 045019, (2016).
• J. Komppula, O. Tarvainen, {\bf T. Kalvas}, H. Koivisto, R. Kronholm, et al., "VUV irradiance measurement of a 2.45 GHz microwave-driven hydrogen discharge", J. Physics D 48, 365201 (2015).

Selected Presentations

Invited:

• "New challenges in ion beam extraction modelling", 17th International Conference on Ion Sources, Geneva, Switzerland, 2017.
• "Challenges in plasma and extraction modelling of negative ion sources", 66th Gaseous Electronics Conference, Princeton, USA, 2013.
• "Beam extraction and transport", CERN Accelerator School on ion sources, Senec, Slovakia, 2012.

Oral:

• "Status of a new 18 GHz ECRIS HIISI", 40th European Cyclotron Progress Meeting, Legnaro, Italy, 2017.
• "Application and development of ion source technology for electronics radiation effects testing", 12th European Conference on Accelerators in Applied Research and Technology, Jyväskylä, Finland, 2016.
• "Thermal design of refridgerated hexapole 18 GHz ECRIS HIISI", Electron Cyclotron Resonance Ion Source Workshop, Nizhny Novgorod, Russia, 2014.
• "A CW radiofrequency ion source for production of negative hydrogen ion beams for cyclotrons", 4th International Symposium on Negative Ions, Beams and Sources, Garching, Germany, 2014.

Poster:

• "Status of new 18 GHz ECRIS HIISI", 17th International Conference on Ion Sources, Geneva, Switzerland, 2017.
• "Power efficiency improvements with the radiofrequency H$^-$ ion source", 16th International Conference on Ion Sources, New York, USA, 2015.

Military service

• I served for 9 months in Riihimäki in 2001.
• I was trained as a medic and I have taken SPR (Finnish Red Cross) first aid courses 1 and 2.
• My military rank is corporal.

Computer skills

• Programming languages: C, C++, Python, Matlab, x86 assembler and PIC16 assembler
• Systems: GNU/Linux, Raspberry, Android, Arduino
• Publishing: \LaTeX, XHTML, CSS, Scribus
• CAD: Autodesk Inventor, LibreCAD, KiCAD, Eagle
• Others: electronics interfacing

Other Activities and Interests

• Rock climbing, chair of Jyväskylä climbing club "Projekti Ry"
• Backpacking
• Cross-country skiing
• Electronics
• Photography
• Music