Results 71 to 80 of about 79,833 (199)

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

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

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

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

SPICE: Scintillation Pipeline for Interferometric Candidate Extraction

The Astronomical Journal
We present Scintillation Pipeline for Interferometric Candidate Extraction (SPICE) an automated CASA-based pipeline developed to identify pulsar candidates in Giant Metrewave Radio Telescope (GMRT) and upgraded GMRT (uGMRT) data through their diffractive
Jitendra Salal, Shriharsh Tendulkar, Visweshwar Ram Marthi   +2 more
doaj   +1 more source

Evaluation of the Scintillation Loss for Optical Communication Systems with Direct Detection [PDF]

, 2006
In optical communications through the atmosphere, the evaluation of a link feasibility often requires the quantification of the scintillation penalty in terms of power loss. To find how much additional optical power is needed to reach the bit-error-rate (
Perlot, Nicolas
core  

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

Refractive interstellar scintillation in 1741-038

The Astrophysical Journal, 1986
A year of VLA observations of the radio source 1741-038 show that it exhibits pronounced variability at 1.49, 15, and 22 GHz, and somewhat reduced activity at 4.9 GHz. We interpret the unusually strong 1.49 GHz variability as due to refractive interstellar scintillation, and the high-frequency variability as being intrinsic to the source.
R. M. Hjellming, Ramesh Narayan
openaire   +1 more source

Interstellar Scintillation Studies of EPTA Pulsars

, 2022
Liu Y. Interstellar Scintillation Studies of EPTA Pulsars.
Liu, Yulan
openaire   +2 more sources

The NANOGrav 12.5 yr Data Set: Probing Interstellar Turbulence and Precision Pulsar Timing with PSR J1903+0327

The Astrophysical Journal
Free electrons in the interstellar medium refract and diffract radio waves along multiple paths, resulting in angular and temporal broadening of radio pulses that limits pulsar timing precision.
Abra Geiger, James M. Cordes, Michael T. Lam, Stella Koch Ocker, Shami Chatterjee, Zaven Arzoumanian, Ava L. Battaglia, Harsha Blumer, Paul R. Brook, Olivia A. Combs, H. Thankful Cromartie, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Justin A. Ellis, Robert D. Ferdman, Elizabeth C. Ferrara, Emmanuel Fonseca, Nate Garver-Daniels, Peter A. Gentile, Deborah C. Good, Megan L. Jones, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Maura A. McLaughlin, Cherry Ng, David J. Nice, Timothy T. Pennucci, Nihan S. Pol, Scott M. Ransom, Renée Spiewak, Ingrid H. Stairs, Kevin Stovall, Joseph K. Swiggum, Sarah J. Vigeland   +35 more
doaj   +1 more source