Experience

Helsinki Institute of Physics

• PhD student

  • May 2019 - Present

• Research Assistant

  • Sep 2017 - May 2019



University of Helsinki

• Masters Student in Physics

  • Jan 2017 - Dec 2018

  The High-Luminosity phase of the Large Hadron Collider (HL-LHC), that is expected to become operational in 2026, aims at increasing the luminosity of the LHC up to ten times higher than its current nominal value. This in turn calls for improving the radiation hardness of the CMS tracker detectors that will be subjected to significantly greater levels of radiation. The following thesisaims at examining the electrical properties of metal–oxide semiconductor (MOS) capacitors and silicon… The High-Luminosity phase of the Large Hadron Collider (HL-LHC), that is expected to become operational in 2026, aims at increasing the luminosity of the LHC up to ten times higher than its current nominal value. This in turn calls for improving the radiation hardness of the CMS tracker detectors that will be subjected to significantly greater levels of radiation. The following thesisaims at examining the electrical properties of metal–oxide semiconductor (MOS) capacitors and silicon sensors of different structures with a design developed for CMS Beam Luminosity Telescope (BLT). These were fabricated on three different wafers and the atomic layer deposition (ALD) of alumina on the p-type silicon substrate was done by using either ozone (O3 ), water (H2O), or water and ozone (H2O+O3) pulsed directly one after the other, as oxygen precursor. The same study is made on Radiation Monitoring (RADMON)-type sensors with n-type silicon substrate and Titanium Nitride (TiN) based bias resistors generated on substrate by deposition of a thin TiN layer by radio-frequency sputtering with different sputtering parameters. Electrical properties of these sensors are derived by measuring their capacitance–voltage and current–voltage characteristics. The results demonstrate that BLT diodes from the three different wafers, having the same thickness, give the same value for full depletion voltage. However, structures with larger metalization area have larger surface currents. RADMON and standard BLT diodes of the same wafer do not show any significant difference in full depletion voltage. However, leakage current for the p-type sensor is higher in comparison to that of the n-type sensor. Results also show that MOS capacitor samples from the H2O+O3 wafer are more sensitive to radiation compared to those from the H2O and O3 wafers. Show more Show less



CERN

• Summer Intern

  • Jun 2018 - Sep 2018

  The entire project is based on checking the reproducibility of measurements done with the CV-IVand TCT setups by changing different factors or parameters (such as temperature and frequencyfor CV-IV setup and temperature with laser intensity for IR laser and Red laser for TCT setup)that vary during data acquisition. We thereby, measure the systematic error of the experimentalsystems under these varying conditions and also can check for the consistency of results.



Indian Institute of Technology, Kharagpur

• Summer Intern

  • May 2016 - Jul 2016

  The project is entirely based on the computational study of a speci c group of materials called MAX phases that exhibit both metallicand ceramic properties. In order to study those properties, we havemade use of a computational programming software called WIEN2kwhich makes use of the concept of density functional theory(DFT) anduses the LAPW method to solve for the Schrodinger equation involvinga many body problem. We study the DOS plots and band structureplots to… The project is entirely based on the computational study of a speci c group of materials called MAX phases that exhibit both metallicand ceramic properties. In order to study those properties, we havemade use of a computational programming software called WIEN2kwhich makes use of the concept of density functional theory(DFT) anduses the LAPW method to solve for the Schrodinger equation involvinga many body problem. We study the DOS plots and band structureplots to check the electronic properties; and the ceramic propertieswere veri ed by comparing the bulk modulus values of MAX compoundsand their corresponding MX compounds. We then studied theproperties of the super-cell generated by incorporating Mn element ofcertain concentration in the MAX phases generating structures withformulae (M(1􀀀x)Mnx)2AC. We studied the electronic properties ofsuch compounds. We also analysed the magnetic property of the materialby analysing the change in the spin magnetic moment of thewhole structure as well the e ect change in values of spin magneticmoment due to incorporation of Manganese in MAX phases. Show more Show less



National Institute of Science Education and Research

• Summer Internship

  • May 2015 - Jul 2015

  The project was based on thermal Model for Particle Production in Ultra-RelativisticHeavy-Ion Collisions at NISER. The project has a relation towards understanding of theexperimental data at Super Proton Synchrotron (WA98, NA49) at CERN, STAR experiment atthe Relativistic Heavy-Ion Collider facility in Brookhaven National Laboratory, USA and alsoin the Large Hadron Collider ALICE experiment at CERN. The goals of these experiments areto explore the QCD phase diagram, through… The project was based on thermal Model for Particle Production in Ultra-RelativisticHeavy-Ion Collisions at NISER. The project has a relation towards understanding of theexperimental data at Super Proton Synchrotron (WA98, NA49) at CERN, STAR experiment atthe Relativistic Heavy-Ion Collider facility in Brookhaven National Laboratory, USA and alsoin the Large Hadron Collider ALICE experiment at CERN. The goals of these experiments areto explore the QCD phase diagram, through a systematic study, by varying colliding beamenergy and colliding ion size. The work being carried out here will add to theknowledge of understanding the statistical nature of particle production in these experimentsand addresses a key issue of thermalization achieved in the heavy-ion collisions at theseexperiments. Show more Show less