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8 results on '"Muehlig K"'

1. Time-resolved XUV Opacity Measurements of Warm-Dense Aluminium

Author

Vinko, S. M., Vozda, V., Andreasson, J., Bajt, S., Bielecki, J., Burian, T., Chalupsky, J., Ciricosta, O., Desjarlais, M. P., Fleckenstein, H., Hajdu, J., Hajkova, V., Hollebon, P., Juha, L., Kasim, M. F., McBride, E. E., Muehlig, K., Preston, T. R., Rackstraw, D. S., Roling, S., Toleikis, S., Wark, J. S., and Zacharias, H.

Subjects
Physics - Plasma Physics, Physics - Computational Physics, Physics - Data Analysis, Statistics and Probability
Abstract

The free-free opacity in plasmas is fundamental to our understanding of energy transport in stellar interiors and for inertial confinement fusion research. However, theoretical predictions in the challenging dense plasma regime are conflicting and there is a dearth of accurate experimental data to allow for direct model validation. Here we present time-resolved transmission measurements in solid-density Al heated by an XUV free-electron laser. We use a novel functional optimization approach to extract the temperature-dependent absorption coefficient directly from an oversampled pool of single-shot measurements, and find a pronounced enhancement of the opacity as the plasma is heated to temperatures of order the Fermi energy. Plasma heating and opacity-enhancement is observed on ultrafast time scales, within the duration of the femtosecond XUV pulse. We attribute further rises in the opacity on ps timescales to melt and the formation of warm-dense matter.

Published
2020
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3. Diffraction data from aerosolized Coliphage PR772 virus particles imaged with the Linac Coherent Light Source

Author

Department of Molecular Biology and Genetics, Demirci, Hasan (ORCID 0000-0002-9135-5397 & YÖK ID 307350), Li, H.; Nazari, R.; Abbey, B.; Alvarez, R.; Aquila, A.; Ayyer, K.; Barty, A.; Berntsen, P.; Bielecki, J.; Pietrini, A.; Bucher, M.; Carini, G.; Chapman, H. N.; Contreras, A.; Daurer, B. J.; Flűckiger, L.; Frank, M.; Hajdu, J.; Hantke, M. F.; Hogue, B. G.; Hosseinizadeh, A.; Hunter, M. S.; Jönsson, H. O.; Kirian, R. A.; Kurta, R. P.; Loh, D.; Maia, F. R. N. C.; Mancuso, A. P.; Morgan, A. J.; McFadden, M.; Muehlig, K.; Munke, A.; Reddy, H. K. N.; Nettelblad, C.; Ourmazd, A.; Rose, M.; Schwander, P.; Marvin, Seibert M.; Sellberg, J. A.; Sierra, R. G.; Sun, Z.; Svenda, M.; Vartanyants, I. A.; Walter, P.; Westphal, D.; Williams, G.; Xavier, P. L.; Yoon, C. H.; Zaare, S., Department of Molecular Biology and Genetics, Demirci, Hasan (ORCID 0000-0002-9135-5397 & YÖK ID 307350), and Li, H.; Nazari, R.; Abbey, B.; Alvarez, R.; Aquila, A.; Ayyer, K.; Barty, A.; Berntsen, P.; Bielecki, J.; Pietrini, A.; Bucher, M.; Carini, G.; Chapman, H. N.; Contreras, A.; Daurer, B. J.; Flűckiger, L.; Frank, M.; Hajdu, J.; Hantke, M. F.; Hogue, B. G.; Hosseinizadeh, A.; Hunter, M. S.; Jönsson, H. O.; Kirian, R. A.; Kurta, R. P.; Loh, D.; Maia, F. R. N. C.; Mancuso, A. P.; Morgan, A. J.; McFadden, M.; Muehlig, K.; Munke, A.; Reddy, H. K. N.; Nettelblad, C.; Ourmazd, A.; Rose, M.; Schwander, P.; Marvin, Seibert M.; Sellberg, J. A.; Sierra, R. G.; Sun, Z.; Svenda, M.; Vartanyants, I. A.; Walter, P.; Westphal, D.; Williams, G.; Xavier, P. L.; Yoon, C. H.; Zaare, S.

Abstract

Single Particle Imaging (SPI) with intense coherent X-ray pulses from X-ray free-electron lasers (XFELs) has the potential to produce molecular structures without the need for crystallization or freezing. Here we present a dataset of 285,944 diffraction patterns from aerosolized Coliphage PR772 virus particles injected into the femtosecond X-ray pulses of the Linac Coherent Light Source (LCLS). Additional exposures with background information are also deposited. The diffraction data were collected at the Atomic, Molecular and Optical Science Instrument (AMO) of the LCLS in 4 experimental beam times during a period of four years. The photon energy was either 1.2 or 1.7 keV and the pulse energy was between 2 and 4 mJ in a focal spot of about 1.3 μm x 1.7 μm full width at half maximum (FWHM). The X-ray laser pulses captured the particles in random orientations. The data offer insight into aerosolised virus particles in the gas phase, contain information relevant to improving experimental parameters, and provide a basis for developing algorithms for image analysis and reconstruction.

Published
2020

4. Time-Resolved XUV Opacity Measurements of Warm Dense Aluminum

Author

Vinko, S. M., primary, Vozda, V., additional, Andreasson, J., additional, Bajt, S., additional, Bielecki, J., additional, Burian, T., additional, Chalupsky, J., additional, Ciricosta, O., additional, Desjarlais, M. P., additional, Fleckenstein, H., additional, Hajdu, J., additional, Hajkova, V., additional, Hollebon, P., additional, Juha, L., additional, Kasim, M. F., additional, McBride, E. E., additional, Muehlig, K., additional, Preston, T. R., additional, Rackstraw, D. S., additional, Roling, S., additional, Toleikis, S., additional, Wark, J. S., additional, and Zacharias, H., additional

Published
2020
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5. Femtosecond fiber timing distribution system for the LINAC Coherent Light Source

Author

Li, H., Chen, L.-J., Bucksbaum, P., Cheng, H. P. H., May, J. E., Smith, S., Muehlig, K., Utamadoss, A., Frisch, J. C., Fry, A. R., and Kaertner, Franz

Abstract

We present the design and progress of a femtosecond fiber timing distribution system for the Linac Coherent Light Source (LCLS) [1-3] at SLAC to enable the machine diagnostic at the 10 fs level. The LCLS at the SLAC is the world’s first hard x-ray free-electron laser (XFEL) with unprecedented peak brightness and pulse duration [1-3]. The time-resolved optical/x-ray pump- probe experiments at this facility open the era of exploring the ultrafast dynamics of atoms, molecules, proteins, and condensed matter [4-6]. However, the temporal resolution of current experiments is limited by the timing jitter between the optical and x-ray pulses [7, 8]. Recently, sub-25 fs root mean squared (rms) jitter is achieved from an x-ray/optical cross-correlator at the LCLS [9], and external seeding is expected to reduce the intrinsic timing jitter [10, 11], which would enable full synchronization of the optical and x-ray pulses with sub- 10 fs precision. For such a technique, tight synchronization between seed and pump lasers needs to be implemented [12-16]. Preliminary test results of the major components for a 4 link system will be presented. Currently, the system is geared towards diagnostics to study the various sources of jitter at the LCLS.

Published
2013

7. Diffraction data from aerosolized Coliphage PR772 virus particles imaged with the Linac Coherent Light Source.

Author

Li H, Nazari R, Abbey B, Alvarez R, Aquila A, Ayyer K, Barty A, Berntsen P, Bielecki J, Pietrini A, Bucher M, Carini G, Chapman HN, Contreras A, Daurer BJ, DeMirci H, Flűckiger L, Frank M, Hajdu J, Hantke MF, Hogue BG, Hosseinizadeh A, Hunter MS, Jönsson HO, Kirian RA, Kurta RP, Loh D, Maia FRNC, Mancuso AP, Morgan AJ, McFadden M, Muehlig K, Munke A, Reddy HKN, Nettelblad C, Ourmazd A, Rose M, Schwander P, Marvin Seibert M, Sellberg JA, Sierra RG, Sun Z, Svenda M, Vartanyants IA, Walter P, Westphal D, Williams G, Xavier PL, Yoon CH, and Zaare S

Subjects
X-Ray Diffraction, Coliphages, Lasers, Particle Accelerators, Virion
Abstract

Single Particle Imaging (SPI) with intense coherent X-ray pulses from X-ray free-electron lasers (XFELs) has the potential to produce molecular structures without the need for crystallization or freezing. Here we present a dataset of 285,944 diffraction patterns from aerosolized Coliphage PR772 virus particles injected into the femtosecond X-ray pulses of the Linac Coherent Light Source (LCLS). Additional exposures with background information are also deposited. The diffraction data were collected at the Atomic, Molecular and Optical Science Instrument (AMO) of the LCLS in 4 experimental beam times during a period of four years. The photon energy was either 1.2 or 1.7 keV and the pulse energy was between 2 and 4 mJ in a focal spot of about 1.3 μm x 1.7 μm full width at half maximum (FWHM). The X-ray laser pulses captured the particles in random orientations. The data offer insight into aerosolised virus particles in the gas phase, contain information relevant to improving experimental parameters, and provide a basis for developing algorithms for image analysis and reconstruction.

Published
2020
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8. THz streak camera performance for single-shot characterization of XUV pulses with complex temporal structures.

Author

Oelze T, Kulyk O, Schütte B, Frühling U, Klimešová E, Jagielski B, Dittrich L, Drescher M, Pan R, Stojanovic N, Polovinkin V, Khakurel KP, Muehlig K, Bermudez Macias IJ, Düsterer S, Faatz B, Andreasson J, Wieland M, and Krikunova M

Abstract

The THz-field-driven streak camera has proven to be a powerful diagnostic-technique that enables the shot-to-shot characterization of the duration and the arrival time jitter of free electron laser (FEL) pulses. Here we investigate the performance of three computational approaches capable to determine the duration of FEL pulses with complex temporal structures from single-shot measurements of up to three simultaneously recorded spectra. We use numerically simulated FEL pulses in order to validate the accuracy of the pulse length retrieval in average as well as in a single-shot mode. We discuss requirements for the THz field strength in order to achieve reliable results and compare our numerical study with the analysis of experimental data that were obtained at the FEL in Hamburg - FLASH.

Published
2020
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