Results 71 to 80 of about 6,025 (156)

Study on the UV FEL single‐shot damage threshold of an Au thin film

Journal of Synchrotron Radiation, Volume 31, Issue 5, Page 1010-1018, September 2024.
Single‐shot damage of an 200 nm‐thick Au thin film is experimentally studied with a UV FEL of 121.6 nm wavelength and 2 ps pulse length. The characterized, as well as visually observed, phenomena are analyzed with multiple theoretical approaches.The damage threshold of an Au‐coated flat mirror, one of the reflective optics installed on the FEL‐2 ...
Meiyi Wu, Qinming Li, Mingchang Wang, Qinghao Zhu, Jiandong Cai, Zhongmin Xu, Hao Zhou, Long Huang, Bingbing Zhang, Runze Qi, Zhe Zhang, Wenbin Li, Yinpeng Zhong, Weiqing Zhang   +13 more
wiley   +1 more source

Probing the Interstellar Medium from Scintillation of the Swooshing Pulsar B0919+06

The Astrophysical Journal
Radio observations of pulsars offer a potential method to probe the intricate microstructure in the turbulent interstellar medium. Here we report on a high-resolution dynamic spectral analysis of the “swooshing pulsar” B0919+06 observed with the Five ...
Z. Wang, Z. G. Wen, J. P. Yuan, N. Wang, Z. Wang, J. L. Chen, H. G. Wang, W. Han, H. Wang, X. F. Duan, C. B. Lyu, J. P. Wang, Z. W. Wu   +12 more
doaj   +1 more source

Compressible MHD Turbulence in Interstellar Plasmas [PDF]

, 2001
Radio-wave scintillation observations reveal a nearly Kolmogorov spectrum of density fluctuations in the ionized interstellar medium. Although this density spectrum is suggestive of turbulence, no theory relevant to its interpretation exists.
Braginskii S. I., Goldreich P., Higdon J. C.   +2 more
core   +2 more sources

Observations of High Definition Symmetric Quasi‐Periodic Scintillations in the Mid‐Latitude Ionosphere With LOFAR

Journal of Geophysical Research: Space Physics, Volume 129, Issue 7, July 2024.
Abstract We present broadband ionospheric scintillation observations of highly defined symmetric quasi‐periodic scintillations (QPS: Maruyama, 1991, https://doi.org/10.1029/91rs00357) caused by plasma structures in the mid‐latitude ionosphere using the LOw Frequency ARray (LOFAR: van Haarlem et al., 2013, https://doi.org/10.1051/0004‐6361/201220873 ...
H. Trigg, G. Dorrian, B. Boyde, A. Wood, R. A. Fallows, M. Mevius   +5 more
wiley   +1 more source

Associations between Scattering Screens and Interstellar Medium Filaments

The Astrophysical Journal
Pulsar scintillation can be used to measure small-scale structure in the Galaxy, but little is known about the specific interstellar medium (ISM) features that cause scintillation.
Ashley M. Stock, Marten H. van Kerkwijk
doaj   +1 more source

Effects of the ISM on Detection of Low-frequency Gravitational Waves

, 2013
Time variable delays due to radio wave propagation in the ionized interstellar medium are a substantial source of error in pulsar timing array efforts.
Stinebring, Dan
core   +1 more source

Precision Determination of Scintillation Screen Parameters from Annual Modulation Measurement of Pulsar Scintillation Arc Curvature with the FAST Telescope

The Astrophysical Journal
Pulsar scintillation observations have revealed ubiquitous discrete scintillation screens in the interstellar medium. A major obstacle in identifying the nature of these screens is the uncertainty in their distances, which prevents precise correlation ...
Yuanshang Huang, Xun Shi, Jumei Yao, Weiwei Zhu, Yonghua Xu   +4 more
doaj   +1 more source

Gravitational Interstellar Scintillation

, 2008
Gravitation could modulate the interstellar scintillation of pulsars in a way that is analogous to refractive interstellar scintillation (RISS). While RISS occurs when a large ionized cloud crosses the pulsar line-of-sight, gravitational interstellar scintillation (GISS) occurs when a compact gravitational deflector lies very near to that line-of-sight.
openaire   +2 more sources

Scintillation Properties of PSR B1133+16 Measured with Very Long Baseline Interferometry

The Astrophysical Journal
The scintillation of pulsars reveals the small-scale structure of the interstellar medium. A powerful technique for characterizing the scintillating structures (screens) combines analysis of scintillation arcs and very long baseline interferometry (VLBI).
Ashley M. Stock, Fardin Syed, Marten H. van Kerkwijk, Rebecca Lin, Franz Kirsten, Ue-Li Pen   +5 more
doaj   +1 more source

The Size of the Radio-Emitting Region in Low-luminosity Active Galactic Nuclei

, 2005
We have used the VLA to study radio variability among a sample of 18 low luminosity active galactic nuclei (LLAGNs), on time scales of a few hours to 10 days. The goal was to measure or limit the sizes of the LLAGN radio-emitting regions, in order to use
de Bruyn A. G., Dennett-Thorpe J., Duncan R. A., Falcke H., James M. Anderson, James S. Ulvestad, Mundell C. G., Quirrenbach A., Quirrenbach A., Rickett B. J., Sawada-Satoh S., Tutui Y., Wagner S. J.   +12 more
core   +1 more source