Obtaining a doctorate degree in University of Tartu is regulated by two university bylaws:
the Procedure for Awarding Doctorates (PAD) and
the Procedure for Publication of Graduation Theses and Dissertations (PPGTD).
More tips to the current students are given at the university doctoral studies page. Multiple details relevant for the progress review of PhD students are explained in the e-learning course Doktoritöö (LOFY.00.006). Students who show sufficient progress during their studies are eligible for a doctoral allowance and university performance stipend.
The principles and dates for enrolling PhD students are described at the Faculty of Science and Technology page.
Many PhD students in the institute are involved in the graduate school „Functional materials and technologies“.
PhD projects 2020
Research groups at the Institute of Physics, University of Tartu (IPUT) are looking for eligible candidates to begin PhD research on the following topics:
- Environmental physics. On atmospheric ions and ionizing radiation; instrument development, deployment and implications
Atmospheric ions play an important role in atmospheric clusters and new particle formation and cloud activation. Detailed understanding on formation of atmospheric ions is a necessity for understanding whole biosphere-atmosphere-climate interconnections. In this work a new instrumentation will be developed to detect ionization rate of air, physical and chemical properties of air ions and characterization of ionizing radiation in atmosphere. Ionizing radiation is originated from galactic cosmic rays and from soil radiation, through direct emission and also through radon gas outgassing. The new instrumentation is deployed to field station for atmospheric research where closure on ion sources and sinks will be estimated. Work will contain radiation modelling, development of new instruments, experimental work in laboratory and in field station, data collection and statistical data analysis of the collected data together with all relevant data measured in the field station. Depending on personal capabilities and interests of candidate the work can be shifted more towards modelling, instrument development or data analysis.
Please contact Prof. Heikki Junninen (Heikki.Junninen [ät] ut.ee).
- Development of scintillation materials
Scintillators are materials converting ionizing radiation and particles into low-energy radiation appropriate for photodetectors. New generation of scintillators play an important role in the development of medical imaging technologies (e.g., TOF-PET, X-Ray computed tomography, etc.) by improving time resolution and image quality, in targeted radiotheraphy by increasing treatment efficiency and in high energy physics experiments providing detectors for increased event rates. Novel wide gap materials for various scintillations applications, based on intrinsic and dopant (e.g., 5d-4f transitions in rare earths) emissions are being developed in our lab. This process includes characterization of the materials properties by means of time-resolved luminescence spectroscopy and other experimental techniques. The research team at the Laboratory of Physics of Ionic Crystals at IPUT is looking for interested early stage researchers (PhD students) to carry our experimental investigations of novel scintillators at the home lab as well as at large scale synchrotron radiation facilities (MAX IV Lab Lund, Sweden; DESY, Hamburg, Germany).
Please contact Prof. Marco Kirm (marco.kirm [ät] ut.ee).
- Computational imaging
Computational imaging is a rapidly evolving subfield of photonics, which has applications in microscopy, medicine, robotics, remote sensing and astronomy. The range of applications increases with advances in sensor technology, computer algorithms and on-board computing capacity. Computational imaging uses computational methods to enhance the image quality, resolution or add spatial dimension to the image beyond the physical or technical limits of the imaging system. By nature, the research is interdisciplinary, and embraces the extensive competence of the University of Tartu in optics, spectroscopy, mathematics, computer science and their applications. The field of computational imaging falls under photonics – an application-oriented science of light, which belongs to the Key Enabling Technologies of the European Commission. The position will be associated with the Computational Imaging and Processing with High Resolution project (CIPHR).
Please contact Dr. Heli Valtna (heli.valtna [ät] ut.ee).
- Development of cosmic ray tomography for identification of low-Z composed threat materials for security appliations
Our research team develops cosmic ray tomography for inspecting and scanning of threat (explosives) and illegal (narcotics) objects from cargo containers, vehicles, luggage, or similar for the applications in security gates on borders, ports, airports, etc. One of the crucial aspects are implementation of appropriate reconstruction methods that could be applicable for low counting statistics, low signal/noise ratio conditions and consider the specify of the natural cosmic ray flux. The PhD candidate will use MATLAB package as a main tool for development of the described purposes.
Please contact Dr. Madis Kiisk (madis.kiisk [ät] ut.ee).
Graphene-based gas sensors on MEMS platforms
The aim of the project is to integrate the gas sensors based on functionalised single-layer graphene onto CMOS chips, micro-hotplates and micro-lightplates. Methods to combine multiple functionalisations on a single chip will be investigated. Project is supported by Graphene Flagship.
Please contact Dr. Raivo Jaaniso (raivo.jaaniso [ät] ut.ee).
Application of machine learning to improve the selectivity and stability of multiresponse gas sensors
Novel directions in the development of semiconductor gas sensors involve application of 2D materials (incl. graphene) and/or optical response/stimulus. This allows implementing miniature multiresponse sensor elements and their arrays, which are inexpensive, sensitive and energy efficient. The aim of the project is to introduce contemporary machine learning software (such as TensorFlow) and develop specialized methods to reduce the drift and response time of such sensors and improve selectivity towards several important gases.
Please contact Dr. Valter Kiisk (valter.kiisk [ät] ut.ee).
- Resummation of leading logarithms in top quark decays co-producing collinear gluons
Due to its large mass, the top quark decays prior to a possible hadronisation, transmitting most of its properties to the decay particles. One of the most interesting parameters in observing the dominant top quark decay t→W+ + Xb is the polarisation of the W boson, caused by the left-handed V − A coupling of the electroweak interaction. If the W boson is one of only two decay particles, its polarisation has to be left handed and longitudinal. However, if an additional gluon is emitted, the two-body configuration is replaced by a three-body configuration. While the helicity fractions of the W boson representing its polarisation are only slightly changed by next-to-leading order (NLO) QCD and electroweak corrections, for a W produced at rest and a gluon produced back-to-back with the bottom quark, one ends up with an isotropic decay configuration. From this it should be clear that the helicity fractions will be substancially altered by the emitted gluon. The proposed doctoral project completes the set of different considerations about the polarisation of the W boson in top quark decays in a natural way, using and refreshing our group experitise on resummation and effective theory methods.
Please contact Stefan Groote (stefan.groote [ät] ut.ee).