Results 31 to 40 of about 231,179 (296)

Collimated gamma beams with high peak flux driven by laser-accelerated electrons

High Power Laser Science and Engineering, 2023
Laser-accelerated electrons are promising in producing gamma-photon beams of high peak flux for the study of nuclear photonics, obtaining copious positrons and exploring photon–photon interaction in vacuum.
Lulin Fan, Tongjun Xu, Shun Li, Zhangli Xu, Jiancai Xu, Jianqiang Zhu, Baifei Shen, Liangliang Ji   +7 more
doaj   +1 more source

Review of Quality Optimization of Electron Beam Based on Laser Wakefield Acceleration

Photonics, 2022
Compared with state-of-the-art radio frequency accelerators, the gradient of laser wakefield accelerators is 3–4 orders of magnitude higher. This is of great significance in the development of miniaturized particle accelerators and radiation sources ...
Kangnan Jiang, Wentao Wang, Ke Feng, Ruxin Li   +3 more
doaj   +1 more source

Diffuse Axonal Injury at Ultra-High Field MRI

PLOS ONE, 2015
Diffuse axonal injury (DAI) is a specific type of traumatic brain injury caused by shearing forces leading to widespread tearing of axons and small vessels. Traumatic microbleeds (TMBs) are regarded as a radiological marker for DAI. This study aims to compare DAI-associated TMBs at 3 Tesla (T) and 7 T susceptibility weighted imaging (SWI) to evaluate ...
Mönninghoff, Christoph, Kraff, Oliver, Maderwald, Stefan, Umutlu, Lale, Theysohn, Jens Matthias, Ringelstein, Adrian, Wrede, Karsten H., Deuschl, Cornelius, Altmeppen, Jan, Ladd, Mark E., Forsting, Michael, Quick, Harald H., Schlamann, Marc U.   +12 more
openaire   +6 more sources

13.4 fs, 0.1 Hz OPCPA Front End for the 100 PW-Class Laser Facility

Ultrafast Science, 2022
Here, we report the recent progress on the front end developed for the 100 PW-class laser facility. Using 3 stages of optical parametric chirped-pulse amplification (OPCPA) based on lithium triborate (LBO) crystals, we realized a 5.26 J/0.1 Hz amplified ...
Xinliang Wang, Xingyan Liu, Xiaoming Lu, Junchi Chen, Yingbin Long, Wenkai Li, Haidong Chen, Xun Chen, Peile Bai, Yanyan Li, Yujie Peng, Yanqi Liu, Fenxiang Wu, Cheng Wang, Zhaoyang Li, Yi Xu, Xiaoyan Liang, Yuxin Leng, Ruxin Li   +18 more
doaj   +1 more source

Directly Measuring the Pulse Front Distortion of High-Peak-Power Femtosecond Lasers

Applied Sciences, 2020
Pulse front distortion occurring in lenses can broaden the temporal profile of the pulse at focus and therefore decrease the focused intensity, especially for large-aperture femtosecond lasers.
Fenxiang Wu, Zongxin Zhang, Xiaojun Yang, Jiabing Hu, Yi Xu, Yuxin Leng   +5 more
doaj   +1 more source

Enhanced laser-driven backward proton acceleration using micro-wire array targets

Frontiers in Physics, 2023
Micro-structured targets can be employed to enhance the coupling of laser energy to the high energy density plasma. Here we report on experimental measurement of enhanced proton beam energy from laser-driven micro-wire array (MWA) targets along the ...
Lulin Fan, Lulin Fan, Tongjun Xu, Qingsong Wang, Jiancai Xu, Guoqiang Zhang, Guoqiang Zhang, Putong Wang, Putong Wang, Changbo Fu, Zhiguo Ma, Xiangai Deng, Yugang Ma, Shun Li, Xiaoming Lu, Jinfeng Li, Rongjie Xu, Cheng Wang, Xiaoyan Liang, Yuxin Leng, Baifei Shen, Baifei Shen, Liangliang Ji, Ruxin Li, Ruxin Li   +24 more
doaj   +1 more source

Emerging methods and applications of ultra-high field MR spectroscopic imaging in the human brain

, 2021
Magnetic Resonance Spectroscopic Imaging (MRSI) of the brain enables insights into the metabolic changes and fluxes in diseases such as tumors, multiple sclerosis, epilepsy, or hepatic encephalopathy, as well as insights into general brain functionality.
Lazen Philipp, Niess Eva, Bednarik Petr, Strasser Bernhard, Hangel Gilbert, Bogner Wolfgang   +5 more
core   +1 more source

Gradient and shim technologies for ultra high field MRI [PDF]

NeuroImage, 2018
Ultra High Field (UHF) MRI requires improved gradient and shim performance to fully realize the promised gains (SNR as well as spatial, spectral, diffusion resolution) that higher main magnetic fields offer. Both the more challenging UHF environment by itself, as well as the higher currents used in high performance coils, require a deeper understanding
Simone Angela Winkler, Franz Schmitt, Hermann Landes, Josh DeBever, Trevor Wade, Andrew Alejski, Brian K. Rutt   +6 more
openaire   +2 more sources

Prospects of Relativistic Flying Mirrors for Ultra-High-Field Science

, 2022
Recent progress of high-peak-power lasers makes researchers envisage ultra-high-field science; however, the current or near future facilities will not be strong enough to reach the vacuum breakdown intensity, i.e., the Schwinger field.
Timur Zh. Esirkepov, James K. Koga, Masaki Kando, Alexander S. Pirozhkov, Sergei V. Bulanov   +4 more
core   +1 more source

A Promising Route to Compact and Economic Sub-15 fs, PW-Level Ti:Sapphire Lasers

Photonics
In quest of achieving compact and economic PW-level Ti:Sapphire (Ti:sa) lasers with a sub-15 fs pulse duration, a modified hybrid amplification scheme, which combines the optical parametric chirped pulse amplifier (OPCPA) and the chirped pulse amplifier (
Fenxiang Wu, Jiabing Hu, Zongxin Zhang, Yang Zhao, Peile Bai, Haidong Chen, Xun Chen, Yi Xu, Yuxin Leng, Ruxin Li   +9 more
doaj   +1 more source