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Shah C, Amaro P, Steinbrügge R, Beilmann C, Bernitt S, Fritzsche S, Surzhykov A, Crespo López-Urrutia JR, Tashenov S. Strong higher-order resonant contributions to x-ray line polarization in hot plasmas. Phys Rev E 2016; 93:061201. [PMID: 27415199 DOI: 10.1103/physreve.93.061201] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Indexed: 11/07/2022]
Abstract
We studied angular distributions of x rays emitted in resonant recombination of highly charged iron and krypton ions, resolving dielectronic, trielectronic, and quadruelectronic channels. A tunable electron beam drove these processes, inducing x rays registered by two detectors mounted along and perpendicular to the beam axis. The measured emission asymmetries comprehensively benchmarked full-order atomic calculations. We conclude that accurate polarization diagnostics of hot plasmas can only be obtained under the premise of inclusion of higher-order processes that were neglected in earlier work.
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Affiliation(s)
- Chintan Shah
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany.,Max-Planck-Institut für Kernphysik, Heidelberg, 69117 Heidelberg, Germany
| | - Pedro Amaro
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - Rene Steinbrügge
- Max-Planck-Institut für Kernphysik, Heidelberg, 69117 Heidelberg, Germany
| | - Christian Beilmann
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany.,Max-Planck-Institut für Kernphysik, Heidelberg, 69117 Heidelberg, Germany
| | - Sven Bernitt
- Max-Planck-Institut für Kernphysik, Heidelberg, 69117 Heidelberg, Germany.,Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, 07743 Jena, Germany
| | - Stephan Fritzsche
- Helmholtz-Institut Jena, 07743 Jena, Germany.,Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | | | | | - Stanislav Tashenov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
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Gunst J, Keitel CH, Pálffy A. Logical operations with single x-ray photons via dynamically-controlled nuclear resonances. Sci Rep 2016; 6:25136. [PMID: 27118340 PMCID: PMC4846863 DOI: 10.1038/srep25136] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/08/2016] [Indexed: 11/29/2022] Open
Abstract
Photonic qubits lie at the heart of quantum information technology, often encoding information in their polarization state. So far, only low-frequency optical and infrared photons have been employed as flying qubits, as the resources that are at present easiest to control. With their essentially different way of interacting with matter, x-ray qubits would bear however relevant advantages: they are extremely robust, penetrate deep through materials, and can be focused down to few-nm waveguides, allowing unprecedented miniaturization. Also, x-rays are resonant to nuclear transitions, which are very well isolated from the environment and present long coherence times. Here, we show theoretically that x-ray polarization qubits can be dynamically controlled by nuclear Mössbauer resonances. The control knob is played by nuclear hyperfine magnetic fields, that allow via fast rotations precise processing of single x-ray quanta polarization. With such rotations, single-qubit and binary logical operations such as a destructive C-NOT gate can be implemented.
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Affiliation(s)
- Jonas Gunst
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Christoph H. Keitel
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
| | - Adriana Pálffy
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
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3
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Hahn C, Weber G, Märtin R, Höfer S, Kämpfer T, Stöhlker T. CdTe Timepix detectors for single-photon spectroscopy and linear polarimetry of high-flux hard x-ray radiation. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:043106. [PMID: 27131653 DOI: 10.1063/1.4945362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Single-photon spectroscopy of pulsed, high-intensity sources of hard X-rays - such as laser-generated plasmas - is often hampered by the pileup of several photons absorbed by the unsegmented, large-volume sensors routinely used for the detection of high-energy radiation. Detectors based on the Timepix chip, with a segmentation pitch of 55 μm and the possibility to be equipped with high-Z sensor chips, constitute an attractive alternative to commonly used passive solutions such as image plates. In this report, we present energy calibration and characterization measurements of such devices. The achievable energy resolution is comparable to that of scintillators for γ spectroscopy. Moreover, we also introduce a simple two-detector Compton polarimeter setup with a polarimeter quality of (98 ± 1)%. Finally, a proof-of-principle polarimetry experiment is discussed, where we studied the linear polarization of bremsstrahlung emitted by a laser-driven plasma and found an indication of the X-ray polarization direction depending on the polarization state of the incident laser pulse.
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Affiliation(s)
- C Hahn
- Helmholtz Institute Jena, 07743 Jena, Germany
| | - G Weber
- Helmholtz Institute Jena, 07743 Jena, Germany
| | - R Märtin
- Helmholtz Institute Jena, 07743 Jena, Germany
| | - S Höfer
- Helmholtz Institute Jena, 07743 Jena, Germany
| | - T Kämpfer
- Helmholtz Institute Jena, 07743 Jena, Germany
| | - Th Stöhlker
- Helmholtz Institute Jena, 07743 Jena, Germany
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Weber S, Beilmann C, Shah C, Tashenov S. Compton polarimeter for 10-30 keV x rays. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:093110. [PMID: 26429432 DOI: 10.1063/1.4931165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a simple and versatile polarimeter for x rays in the energy range of 10-30 keV. It uses Compton scattering in low-Z materials such as beryllium or boron carbide. The azimuthal distribution of the scattered x rays is sampled by an array of 12 silicon PIN diodes operated at room temperature. We evaluated the polarimetry performance using Monte-Carlo simulations and show experimental results.
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Affiliation(s)
- S Weber
- Physics Institute, Heidelberg University, 69120 Heidelberg, Germany
| | - C Beilmann
- Physics Institute, Heidelberg University, 69120 Heidelberg, Germany
| | - C Shah
- Physics Institute, Heidelberg University, 69120 Heidelberg, Germany
| | - S Tashenov
- Physics Institute, Heidelberg University, 69120 Heidelberg, Germany
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5
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Tashenov S, Banaś D, Beyer H, Brandau C, Fritzsche S, Gumberidze A, Hagmann S, Hillenbrand PM, Jörg H, Kojouharov I, Kozhuharov C, Lestinsky M, Litvinov YA, Maiorova AV, Schaffner H, Shabaev VM, Spillmann U, Stöhlker T, Surzhykov A, Trotsenko S. Observation of coherence in the time-reversed relativistic photoelectric effect. PHYSICAL REVIEW LETTERS 2014; 113:113001. [PMID: 25259973 DOI: 10.1103/physrevlett.113.113001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Indexed: 06/03/2023]
Abstract
The photoelectric effect has been studied in the regime of hard x rays and strong Coulomb fields via its time-reversed process of radiative recombination (RR). In the experiment, the relativistic electrons recombined into the 2p_{3/2} excited state of hydrogenlike uranium ions, and both the RR x rays and the subsequently emitted characteristic x rays were detected in coincidence. This allowed us to observe the coherence between the magnetic substates in a highly charged ion and to identify the contribution of the spin-orbit interaction to the RR process.
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Affiliation(s)
- S Tashenov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - D Banaś
- Institute of Physics, Jan Kochanowski University, 25-406 Kielce, Poland
| | - H Beyer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - C Brandau
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany and FIAS Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany
| | - S Fritzsche
- Helmholtz-Institut Jena, 07743 Jena, Germany and Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - A Gumberidze
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany and FIAS Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany
| | - S Hagmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - P-M Hillenbrand
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - H Jörg
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Ch Kozhuharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Lestinsky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Yu A Litvinov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A V Maiorova
- St. Petersburg State University, 198504 St. Petersburg, Russia
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - V M Shabaev
- St. Petersburg State University, 198504 St. Petersburg, Russia
| | - U Spillmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Th Stöhlker
- Helmholtz-Institut Jena, 07743 Jena, Germany and Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - A Surzhykov
- Helmholtz-Institut Jena, 07743 Jena, Germany
| | - S Trotsenko
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany and Helmholtz-Institut Jena, 07743 Jena, Germany
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6
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Märtin R, Weber G, Barday R, Fritzsche Y, Spillmann U, Chen W, DuBois RD, Enders J, Hegewald M, Hess S, Surzhykov A, Thorn DB, Trotsenko S, Wagner M, Winters DFA, Yerokhin VA, Stöhlker T. Polarization transfer of bremsstrahlung arising from spin-polarized electrons. PHYSICAL REVIEW LETTERS 2012; 108:264801. [PMID: 23004992 DOI: 10.1103/physrevlett.108.264801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Indexed: 06/01/2023]
Abstract
We report on a study of the polarization transfer between transversely polarized incident electrons and the emitted x rays for electron-atom bremsstrahlung. By means of Compton polarimetry we performed for the first time an energy-differential measurement of the complete properties of bremsstrahlung emission related to linear polarization, i.e., the degree of linear polarization as well as the orientation of the polarization axis. For the high-energy end of the bremsstrahlung continuum the experimental results for both observables show a high sensitivity on the initial electron spin polarization and prove that the polarization orientation is virtually independent of the photon energy.
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Affiliation(s)
- R Märtin
- Helmholtz-Institut Jena, 07743 Jena, Germany
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