R. Zwaska

ORCID: 0000-0002-4889-5988
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About
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Research Areas
  • Neutrino Physics Research
  • Particle physics theoretical and experimental studies
  • Particle accelerators and beam dynamics
  • Astrophysics and Cosmic Phenomena
  • Particle Accelerators and Free-Electron Lasers
  • Dark Matter and Cosmic Phenomena
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Particle Detector Development and Performance
  • Muon and positron interactions and applications
  • Superconducting Materials and Applications
  • Radiation Detection and Scintillator Technologies
  • Gyrotron and Vacuum Electronics Research
  • Plasma Diagnostics and Applications
  • Electron and X-Ray Spectroscopy Techniques
  • Nuclear Physics and Applications
  • Graphite, nuclear technology, radiation studies
  • Radiation Effects in Electronics
  • Atomic and Subatomic Physics Research
  • Photocathodes and Microchannel Plates
  • Pulsars and Gravitational Waves Research
  • Fusion materials and technologies
  • Electrostatic Discharge in Electronics
  • Noncommutative and Quantum Gravity Theories
  • Radiation Therapy and Dosimetry

Fermi National Accelerator Laboratory
2016-2025

Cochin University of Science and Technology
2023-2024

Banaras Hindu University
2023-2024

California Institute of Technology
2008-2024

Charles University
2023-2024

University of Belgrade
2017

Colorado State University
2017

Universities Research Association
2017

Target (United States)
2017

National and Kapodistrian University of Athens
2008-2013

We report the first observation of off-axis neutrino interactions in MiniBooNE detector from NuMI beam line at Fermilab. The is located 745 m production target, 110 mrad angle (6.3°) with respect to axis. Samples charged-current quasielastic νμ and νe are analyzed found be agreement expectation. This provides a direct verification expected pion kaon contributions flux validates modeling beam.Received 12 September 2008DOI:https://doi.org/10.1103/PhysRevLett.102.211801©2009 American Physical Society

10.1103/physrevlett.102.211801 article EN Physical Review Letters 2009-05-28

In search of a low-Z pion production target for the Long Baseline Neutrino Facility (LBNF) Deep Underground Experiment (DUNE) four graphite grades were irradiated with protons in energy range 140--180 MeV, to peak fluence $\ensuremath{\sim}6.1\ifmmode\times\else\texttimes\fi{}{10}^{20}\text{ }\text{ }\mathrm{p}/{\mathrm{cm}}^{2}$ and irradiation temperatures between $120--200\text{ }\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. The test array included POCO ZXF-5Q, Toyo-Tanso IG 430,...

10.1103/physrevaccelbeams.20.071002 article EN cc-by Physical Review Accelerators and Beams 2017-07-24

The NT-02 neutrino physics target made of the isotropic graphite grade produced neutrinos for MINOS and MINERVA high-energy experiments. segmented, 95-cm-long was bombarded with a 340 kW, Gaussian 1.1 mm sigma beam 120 GeV protons reaching $6.516\ifmmode\times\else\texttimes\fi{}{10}^{20}$ on peak fluence $8.6\ifmmode\times\else\texttimes\fi{}{10}^{21}\text{ }\text{ }\mathrm{protons}/{\mathrm{cm}}^{2}$. Reductions in detected events during experiment were attributed to radiation-induced...

10.1103/physrevaccelbeams.22.041001 article EN cc-by Physical Review Accelerators and Beams 2019-04-08

10.1016/j.nima.2006.08.031 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2006-09-06

In an effort to develop and design next generation high power target materials for particle physics research, the possibility of fabricating nonwoven metallic or ceramic nanofibers by electrospinning process is explored. A low-cost unit set up in-house production various nanofibers. Yttria-stabilized zirconia are successfully fabricated a mixture zirconium carbonate with high-molecular weight polyvinylpyrrolidone polymer solution. Some inherent weaknesses like thickness nanofiber mat slow...

10.1103/physrevaccelbeams.24.123001 article EN cc-by Physical Review Accelerators and Beams 2021-12-07

Beryllium is a material extensively used in various particle accelerator beam lines and target facilities, as windows and, to lesser extent, secondary production targets. With increasing intensities of future multimegawatt these components will have withstand even greater thermal mechanical loads during operation. As result, it critical understand the beam-induced shock limit beryllium help reliably operate without having compromise efficiency by limiting parameters. part RaDIATE (radiation...

10.1103/physrevaccelbeams.22.044501 article EN cc-by Physical Review Accelerators and Beams 2019-04-04

Novel beam-intercepting materials and targetry concepts are essential to improve the performance, reliability operation lifetimes of next generation multi-megawatt (multi-MW) accelerator target facilities. The components must sustain an order-of-magnitude increase in particle beam intensities beyond current state-of-the-art. With conventional already limiting scope experiments, it is crucial investigate novel materials, technologies that will satisfy requirements maximize physics benefits...

10.48550/arxiv.2203.08357 preprint EN cc-by arXiv (Cornell University) 2022-01-01

A comprehensive study on the effects of energetic protons carbon-fiber composites and compounds under consideration for use as low-Z pion production targets in future high-power accelerators low-impedance collimating elements intercepting TeV-level at Large Hadron Collider has been undertaken addressing two key areas, namely, thermal shock absorption resistance to irradiation damage. Carbon-fiber various fiber weaves have widely used aerospace industries due their unique combination high...

10.1103/physrevaccelbeams.19.111002 article EN cc-by Physical Review Accelerators and Beams 2016-11-16

The flagship of Fermilab's long term research program is the Deep Underground Neutrino Experiment (DUNE), located Sanford Research Facility (SURF) in Lead, South Dakota, which will study neutrino oscillations with a baseline 1300 km. neutrinos be produced Long Baseline (LBNF), proposed new beam line from Main Injector. physics goals DUNE require proton power roughly 2.5 MW at 120 GeV, five times current maximum power. This poster outlines staged plan to achieve required over next 15 years.

10.18429/jacow-ipac2016-tuoaa03 article EN 7th International Particle Accelerator Conference (IPAC'16), Busan, Korea, May 8-13, 2016 2016-06-16

The Fermilab Proton Source has an upgrade plan called the Improvement Plan (PIP) [1]. PIP several key objectives which were laid out by laboratory management in 2011. should address necessary hardware modifications for increased repetition rate to 15 Hz, capable of delivering 2.25E17 protons/hour while maintaining 2012 activation levels, ensuring viable operation proton source through 2025 with availability greater than 85%. believes goals are ensure that delivers on commitment physics...

10.18429/jacow-ipac2014-thpme075 article EN 5th Int. Particle Accelerator Conf. (IPAC'14), Dresden, Germany, June 15-20, 2014 2014-07-01

The Long Baseline Neutrino Facility (LBNF, formerly the Experiment) is under design as a next generation neutrino oscillation experiment, with primary objectives to search for CP violation in leptonic sector, determine mass hierarchy and provide precise measurement of θ23. facility will generate beam at Fermilab by interaction proton target material. At ultimate anticipated power 2.3 MW material must dissipate heat load between 10 25 kW depending on size. This paper presents concept based an...

10.1103/physrevstab.18.091003 article EN cc-by Physical Review Special Topics - Accelerators and Beams 2015-09-14

10.18429/jacow-ipac2015-mopma039 article EN 6th Int. Particle Accelerator Conf. (IPAC'15), Richmond, VA, USA, May 3-8, 2015 2015-06-01

Estimates indicate that the electron cloud effect could be a limiting factor for Main Injector intensity upgrades, with or without presence of new 8 GeV superconducting Linac injector. The may turn out to an issue operational relevance other parts Fermilab accelerator complex as well. To improve our understanding situation, two sections specially made vacuum test pipe outfitted detection ANL provided retarding field analyzers (RFAs) were installed in Tevatron and Injector. In this report we...

10.1109/pac.2007.4440472 article EN 2007-01-01

We have performed a series of experiments at Fermilab to explore the electron cloud phenomenon. The Main Injector will its beam intensity increased four-fold in Project X upgrade, and would be subject instabilities from cloud. present measurements formation with materials for mitigation Cloud. An experimental installation Titanium-Nitride (TiN) coated pipes has been under study since 2009; this material was directly compared an adjacent stainless chamber through measurement Retarding Field...

10.48550/arxiv.1203.1936 preprint EN other-oa arXiv (Cornell University) 2012-01-01

10.1016/j.nima.2005.08.076 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2005-09-15

We discuss the progress made on a new installation in Fermilab's Main Injector that will help investigate electron cloud phenomenon by making direct measurements of secondary yield (SEY) samples irradiated accelerator. In Project X upgrade have its beam intensity increased factor three compared to current operations. This may result being subject instabilities from cloud. Measured SEY values can be used further constrain simulations and aid our extrapolation intensities. The test-stand,...

10.48550/arxiv.1301.6989 preprint EN other-oa arXiv (Cornell University) 2013-01-01
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