@article{MTMT:31101528,
	title = {A transition-edge sensor-based x-ray spectrometer for the study of highly charged ions at the National Institute of Standards and Technology electron beam ion trap},
	url = {https://m2.mtmt.hu/api/publication/31101528},
	author = {Szypryt, P. and O'Neil, G. C. and Takács, Endre and Tan, J. N. and Buechele, S. W. and Naing, A. S. and Bennett, D. A. and Doriese, W. B. and Durkin, M. and Fowler, J. W. and Gard, J. D. and Hilton, G. C. and Morgan, K. M. and Reintsema, C. D. and Schmidt, D. R. and Swetz, D. S. and Ullom, J. N. and Ralchenko, Yu.},
	doi = {10.1063/1.5116717},
	journal-iso = {REV SCI INSTRUM},
	journal = {REVIEW OF SCIENTIFIC INSTRUMENTS},
	volume = {90},
	unique-id = {31101528},
	issn = {0034-6748},
	abstract = {We report on the design, commissioning, and initial measurements of a Transition-Edge Sensor (TES) x-ray spectrometer for the Electron Beam Ion Trap (EBIT) at the National Institute of Standards and Technology (NIST). Over the past few decades, the NIST EBIT has produced numerous studies of highly charged ions in diverse fields such as atomic physics, plasma spectroscopy, and laboratory astrophysics. The newly commissioned NIST EBIT TES Spectrometer (NETS) improves the measurement capabilities of the EBIT through a combination of high x-ray collection efficiency and resolving power. NETS utilizes 192 individual TES x-ray microcalorimeters (166/192 yield) to improve upon the collection area by a factor of similar to 30 over the 4-pixel neutron transmutation doped germanium-based microcalorimeter spectrometer previously used at the NIST EBIT. The NETS microcalorimeters are optimized for the x-ray energies from roughly 500 eV to 8000 eV and achieve an energy resolution of 3.7 eV-5.0 eV over this range, a more modest (<2x) improvement over the previous microcalorimeters. Beyond this energy range, NETS can operate with various trade-offs, the most significant of which are reduced efficiency at lower energies and being limited to a subset of the pixels at higher energies. As an initial demonstration of the capabilities of NETS, we measured transitions in He-like and H-like O, Ne, and Ar as well as Ni-like W. We detail the energy calibration and data analysis techniques used to transform detector counts into x-ray spectra, a process that will be the basis for analyzing future data.},
	year = {2019},
	eissn = {1089-7623}
}

@article{MTMT:30932613,
	title = {EBIT Observation of Ar Dielectronic Recombination Lines near the Unknown Faint X-Ray Feature Found in the Stacked Spectrum of Galaxy Clusters},
	url = {https://m2.mtmt.hu/api/publication/30932613},
	author = {Gall, A.C. and Foster, A.R. and Silwal, R. and Dreiling, J.M. and Borovik, A. and Kilgore, E. and Ajello, M. and Gillaspy, J.D. and Ralchenko, Y. and Takács, Endre},
	doi = {10.3847/1538-4357/ab0177},
	journal-iso = {ASTROPHYS J},
	journal = {ASTROPHYSICAL JOURNAL},
	volume = {872},
	unique-id = {30932613},
	issn = {1538-4357},
	year = {2019},
	eissn = {0004-637X}
}

@article{MTMT:30498730,
	title = {High-resolution X-ray spectroscopy of highly charged tungsten EBIT plasma},
	url = {https://m2.mtmt.hu/api/publication/30498730},
	author = {Sanders, S. C. and Silwal, R. and Rudramadevi, B. H. and Gall, A. C. and Takács, Endre},
	doi = {10.1016/j.nimb.2018.06.013},
	journal-iso = {NUCL INSTRUM METH B},
	journal = {NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS},
	volume = {431},
	unique-id = {30498730},
	issn = {0168-583X},
	abstract = {Highly charged tungsten transitions can be used as a diagnostic tool for investigating performance of the fusion device. Systematic spectroscopic investigations of the radiative decay channels of the tungsten charge states allow for extending the fundamental understanding of highly charged ions and can serve as a diagnostic tool to improve applied plasma research. Electron beam ion traps (EBIT) offer the ability to generate emission from highly charged tungsten ions because of their charge state and excitation selectivity due to their quasi-mono-energetic electron beam. In this work, we report the current experimental capabilities of the EBIT at the National Institute of Standards and Technology (NIST). High-resolution measurements of EUV and x-ray transitions from tungsten charge states are shown, demonstrating our ability to produce and identify the spectral features of highly charged tungsten plasma. While the experimental results were limited by the lack of an absolute calibration of the spectrometer, we present approximate transition energies of two strong transitions from the Ti-like W52+ and Sc-like W53+ charge states. Our estimates agree quite well with the results of FAC simulations, where these strongest transitions were identified to originate from 3d-4f transitions. This decay channel has been shown to be the strongest transition for surrounding charge states.},
	keywords = {highly charged ions; X-ray spectroscopy; tungsten; EBIT; EUV spectroscopy; Fusion research},
	year = {2018},
	eissn = {1872-9584},
	pages = {47-54}
}

@article{MTMT:30498728,
	title = {Measuring the difference in nuclear charge radius of Xe isotopes by EUV spectroscopy of highly charged Na-like ions},
	url = {https://m2.mtmt.hu/api/publication/30498728},
	author = {Silwal, R. and Lapierre, A. and Gillaspy, J. D. and Dreiling, J. M. and Blundell, S. A. and Dipti, . and Borovik, A. and Gwinner, G. and Villari, A. C. C. and Ralchenko, Yu and Takács, Endre},
	doi = {10.1103/PhysRevA.98.052502},
	journal-iso = {PHYS REV A},
	journal = {PHYSICAL REVIEW A},
	volume = {98},
	unique-id = {30498728},
	issn = {2469-9926},
	abstract = {The difference in the mean-square nuclear charge radius of xenon isotopes was measured utilizing a method based on extreme ultraviolet spectroscopy of highly charged Na-like ions. The isotope shift of the Na-like D1 (3s(2)S(1/2) - 3(P)(2)P(1/2)) transition between the Xe-124 and Xe-136 isotopes was experimentally determined using the electron-beam ion-trap facility at the National Institute of Standards and Technology. The mass-shift and the field-shift coefficients were calculated with enhanced precision by the relativistic many-body perturbation theory and multiconfiguration Dirac-Hartree-Fock method. The mean-square nuclear charge radius difference was found to be delta < r(2)>(136,124) = 0.269(42) fm(2). Our result has smaller uncertainty than previous experimental results and agrees with the literature values.},
	year = {2018},
	eissn = {2469-9934}
}

@article{MTMT:27539265,
	title = {Intensity modulated operating mode of the rotating gamma system},
	url = {https://m2.mtmt.hu/api/publication/27539265},
	author = {Sengupta, Bishwambhar and Gulyas, Laszlo and Medlin, Donald and Koroknai, Tibor and Takacs, David and Filep, Gyorgy and Panko, Peter and Godo, Bence and Hollo, Tamas and Zheng, Xiao Ran and Fedorcsak, Imre and Dobai, Jozsef and Bognar, Laszlo and Takács, Endre},
	doi = {10.1002/mp.12887},
	journal-iso = {MED PHYS},
	journal = {MEDICAL PHYSICS},
	volume = {45},
	unique-id = {27539265},
	issn = {0094-2405},
	year = {2018},
	eissn = {2473-4209},
	pages = {2289-2298}
}

@article{MTMT:3308986,
	title = {Identification and Plasma Diagnostics Study of Extreme Ultraviolet Transitions in Highly Charged Yttrium},
	url = {https://m2.mtmt.hu/api/publication/3308986},
	author = {Roshani, Silwal and Takács, Endre and Joan, M Dreiling and John, D Gillaspy and Yuri, Ralchenko},
	doi = {10.3390/atoms5030030},
	journal-iso = {ATOMS},
	journal = {ATOMS},
	volume = {5},
	unique-id = {3308986},
	year = {2017},
	eissn = {2218-2004},
	pages = {30-52}
}

@article{MTMT:2948571,
	title = {Population based ranking of frameless CT-MRI registration methods [Quantifizierung der Qualität von Methoden zur Registrierung von CT- und MRT-Bildern unter Verwendung von Bilddaten eines großen Patientenkollektivs]},
	url = {https://m2.mtmt.hu/api/publication/2948571},
	author = {Opposits, Gábor and Kis, Sándor Attila and Trón, Lajos and Berényi, Ervin László and Takács, Endre and Dobai, JG and Bognár, László and Szucs, B and Emri, Miklós},
	doi = {10.1016/j.zemedi.2015.07.001},
	journal-iso = {Z MED PHYS},
	journal = {ZEITSCHRIFT FUR MEDIZINISCHE PHYSIK},
	volume = {25},
	unique-id = {2948571},
	issn = {0939-3889},
	abstract = {BACKGROUND: Clinical practice often requires simultaneous information obtained by two different imaging modalities. Registration algorithms are commonly used for this purpose. Automated procedures are very helpful in cases when the same kind of registration has to be performed on images of a high number of subjects. Radiotherapists would prefer to use the best automated method to assist therapy planning, however there are not accepted procedures for ranking the different registration algorithms. PURPOSE: We were interested in developing a method to measure the population level performance of CT-MRI registration algorithms by a parameter of values in the [0,1] interval. MATERIALS AND METHODS: Pairs of CT and MRI images were collected from 1051 subjects. Results of an automated registration were corrected manually until a radiologist and a neurosurgeon expert both accepted the result as good. This way 1051 registered MRI images were produced by the same pair of experts to be used as gold standards for the evaluation of the performance of other registration algorithms. Pearson correlation coefficient, mutual information, normalized mutual information, Kullback-Leibler divergence, L1 norm and square L2 norm (dis)similarity measures were tested for sensitivity to indicate the extent of (dis)similarity of a pair of individual mismatched images. RESULTS: The square Hellinger distance proved suitable to grade the performance of registration algorithms at population level providing the developers with a valuable tool to rank algorithms. CONCLUSIONS: The developed procedure provides an objective method to find the registration algorithm performing the best on the population level out of newly constructed or available preselected ones.},
	year = {2015},
	eissn = {1876-4436},
	pages = {353-367}
}

@article{MTMT:2888311,
	title = {Diagnostic Measurements of CUEBIT Based on the Dielectronic Resonance Process},
	url = {https://m2.mtmt.hu/api/publication/2888311},
	author = {Takács, Endre and Kimmel, T D and Brandenburg, K H and Wilson, R K and Gall, A C and Harriss, J E and Sosolik, C E},
	doi = {10.1063/1.4905414},
	journal-iso = {AIP CONF PROC},
	journal = {AIP CONFERENCE PROCEEDINGS},
	volume = {1640},
	unique-id = {2888311},
	issn = {0094-243X},
	year = {2015},
	eissn = {1551-7616},
	pages = {154-160}
}

@article{MTMT:2888313,
	title = {Helium-like titanium x-ray spectrum as a probe of QED computation},
	url = {https://m2.mtmt.hu/api/publication/2888313},
	author = {Payne, A T and Chantler, C T and Kinnane, M N and Gillaspy, J D and Hudson, L T and Smale, L F and Henins, A and Kimpton, J A and Takács, Endre},
	doi = {10.1088/0953-4075/47/18/185001},
	journal-iso = {J PHYS B AT MOL OPT PH},
	journal = {JOURNAL OF PHYSICS B: ATOMIC MOLECULAR AND OPTICAL PHYSICS},
	volume = {47},
	unique-id = {2888313},
	issn = {0953-4075},
	year = {2014},
	eissn = {1361-6455}
}

@article{MTMT:2888312,
	title = {X-ray measurements in helium-like atoms increased discrepancy between experiment and theoretical QED},
	url = {https://m2.mtmt.hu/api/publication/2888312},
	author = {Chantler, C T and Payne, A T and Gillaspy, J D and Hudson, L T and Smale, L F and Henins, A and Kimpton, J A and Takács, Endre},
	doi = {10.1088/1367-2630/16/12/123037},
	journal-iso = {NEW J PHYS},
	journal = {NEW JOURNAL OF PHYSICS},
	volume = {16},
	unique-id = {2888312},
	issn = {1367-2630},
	year = {2014},
	eissn = {1367-2630}
}