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2 results on '"R. Tarkeshian"'

1. The ESSnuSB Design Study: Overview and Future Prospects

Author

A. Alekou, E. Baussan, A. K. Bhattacharyya, N. Blaskovic Kraljevic, M. Blennow, M. Bogomilov, B. Bolling, E. Bouquerel, F. Bramati, A. Branca, O. Buchan, A. Burgman, C. J. Carlile, J. Cederkall, S. Choubey, P. Christiansen, M. Collins, E. Cristaldo Morales, L. D’Alessi, H. Danared, D. Dancila, J. P. A. M. de André, J. P. Delahaye, M. Dracos, I. Efthymiopoulos, T. Ekelöf, M. Eshraqi, G. Fanourakis, A. Farricker, E. Fernandez-Martinez, B. Folsom, T. Fukuda, N. Gazis, B. Gålnander, Th. Geralis, M. Ghosh, A. Giarnetti, G. Gokbulut, L. Halić, M. Jenssen, R. Johansson, A. Kayis Topaksu, B. Kildetoft, B. Kliček, M. Kozioł, K. Krhač, Ł. Łacny, M. Lindroos, A. Longhin, C. Maiano, S. Marangoni, C. Marrelli, C. Martins, D. Meloni, M. Mezzetto, N. Milas, M. Oglakci, T. Ohlsson, M. Olvegård, T. Ota, M. Pari, J. Park, D. Patrzalek, G. Petkov, P. Poussot, F. Pupilli, S. Rosauro-Alcaraz, D. Saiang, J. Snamina, A. Sosa, G. Stavropoulos, M. Stipčević, B. Szybiński, R. Tarkeshian, F. Terranova, J. Thomas, T. Tolba, E. Trachanas, R. Tsenov, G. Vankova-Kirilova, N. Vassilopoulos, E. Wildner, J. Wurtz, O. Zormpa, and Y. Zou

Subjects
neutrino, oscillation, long baseline, CP violation, second maximum, precision, Elementary particle physics, QC793-793.5
Abstract

ESSnuSB is a design study for an experiment to measure the CP violation in the leptonic sector at the second neutrino oscillation maximum using a neutrino beam driven by the uniquely powerful ESS linear accelerator. The reduced impact of systematic errors on sensitivity at the second maximum allows for a very precise measurement of the CP violating parameter. This review describes the fundamental advantages of measurement at the second maximum, the necessary upgrades to the ESS linac in order to produce a neutrino beam, the near and far detector complexes, and the expected physics reach of the proposed ESSnuSB experiment, concluding with the near future developments aimed at the project realization.

Published
2023
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2. Real-Time Tomography of Gas-Jets with a Wollaston Interferometer

Author

Rasmus Ischebeck, Nick Sauerwein, Andreas Adelmann, Benedikt Hermann, Uldis Locans, R. Tarkeshian, and Malte C. Kaluza

Subjects
knife-edge, real-time, 01 natural sciences, lcsh:Technology, 010305 fluids & plasmas, law.invention, lcsh:Chemistry, Acceleration, Optics, law, 0103 physical sciences, Solenoid valve, gas-jets, General Materials Science, Supersonic speed, 010306 general physics, Instrumentation, interferometry, LWFA, shock-front, lcsh:QH301-705.5, Fluid Flow and Transfer Processes, Physics, Jet (fluid), business.industry, lcsh:T, Process Chemistry and Technology, General Engineering, Free-electron laser, Laser, lcsh:QC1-999, Computer Science Applications, Interferometry, lcsh:Biology (General), lcsh:QD1-999, lcsh:TA1-2040, Tomography, business, lcsh:Engineering (General). Civil engineering (General), lcsh:Physics
Abstract

A tomographic gas-density diagnostic using a Single-Beam Wollaston Interferometer able to characterize non-symmetric density distributions in gas jets is presented. A real-time tomographic algorithm is able to reconstruct three-dimensional density distributions. A Maximum Likelihood-Expectation Maximization algorithm, an iterative method with good convergence properties compared to simple back projection, is used. With the use of graphical processing units, real-time computation and high resolution are achieved. Two different gas jets are characterized: a kHz, piezo-driven jet for lower densities and a solenoid valve-based jet producing higher densities. While the first jet is used for free electron laser photon beam characterization, the second jet is used in laser wake field acceleration experiments. In this latter application, well-tailored and non-symmetric density distributions produced by a supersonic shock front generated by a razor blade inserted laterally to the gas flow, which breaks cylindrical symmetry, need to be characterized.

Published
2018

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