Results 41 to 50 of about 5,897,692 (241)

Modelling the Impact of Graphene Coating of Different Thicknesses on Polyimide Substrate on the Secondary Electron Yield

, 2023
Polyimide material is widely used in the aerospace field, but its secondary electron emission yield is high. In this study, a graphene coating was used to suppress its secondary electron emission, and the secondary electron emission yield of graphene ...
Yanzhao Ma, Tao Zhang, Xiangyu Nie, Sisheng Liu, Yong Wu, Guoming Hu, Xin Qi, Weiping Peng   +7 more
core   +1 more source

Impact of deconditioning on the secondary electron yield of Cu surfaces in particle accelerators

Physical Review Accelerators and Beams, 2020
Electron cloud is a critical phenomenon in particle accelerators operating with high intensity and positively charged beams, as it is responsible for beam instabilities, vacuum degradation, and heat load on cryogenic sections.
V. Petit, M. Taborelli, D. A. Zanin, H. Neupert, P. Chiggiato, M. Belhaj   +5 more
doaj   +1 more source

Characteristics of secondary electron emission and multipactor from a nested microtrap structure surface

AIP Advances, 2021
It is known that an appropriate surface structure can suppress the secondary electron emission as a result of the receded multipactor in a spacecraft microwave component. On the other hand, the multiplier effect caused by electron re-entrance in ordinary
Lu Liu, Guobao Feng, Bangdao Chen, Ning Wang, Wanzhao Cui   +4 more
doaj   +1 more source

Development and performance of a secondary electron detector based on a MCP

Nuclear Analysis, 2022
Secondary electron detector (SED) is a key component used in the fission product yield experiment to mark the start time of fission events. The signal to noise ratio and timing characteristics has an important impact on the mass resolution for measuring ...
Jun Xiao, Pu Zheng, Tonghua Zhu, Jianguo Qin, Junjie Sun, Yunfeng Mu, Xinxin Lu   +6 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Suppression of Secondary Electron Emission from Nickel Surface by Graphene Composites Based on First-Principles Method

Nanomaterials, 2023
Secondary electron emission (SEE) is a fundamental phenomenon of particle/surface interaction, and the multipactor effect induced by SEE can result in disastrous impacts on the performance of microwave devices. To suppress the SEE-induced multipactor, an
Min Peng, Chang Nan, Dawei Wang, Meng Cao, Liang Zhang, Laijun Liu, Chunliang Liu, Dangqi Fang, Yiqi Zhang, Yonggui Zhai, Yongdong Li   +10 more
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

FEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil, Jeffrey A. Hawkes, Cecilia Blikstad, Pia Lindberg   +3 more
wiley   +1 more source

Analytical model for secondary electron yield of composite layered structures

AIP Advances
An analytical model is developed to calculate the secondary electron yield (SEY) of composite layered structures, based on two independent physical parameters of secondary electron emission.
Xue-Man Wan, Jing Yang, Tian-Cun Hu, Guo-Bao Feng, Na Zhang, Zhao-Lun Yang, Yun He, Wan-Zhao Cui   +7 more
doaj   +1 more source

Amorphous carbon coatings for the mitigation of electron cloud in the CERN Super Proton Synchrotron

Physical Review Special Topics. Accelerators and Beams, 2011
Electron cloud buildup is a major limitation for high-energy particle accelerators such as the CERN Super Proton Synchrotron (SPS). Amorphous carbon thin films with low initial secondary electron yield (SEY≅1.0) have been applied as a mitigation material
C. Yin Vallgren, G. Arduini, J. Bauche, S. Calatroni, P. Chiggiato, K. Cornelis, P. Costa Pinto, B. Henrist, E. Métral, H. Neupert, G. Rumolo, E. Shaposhnikova, M. Taborelli   +12 more
doaj   +1 more source

Smaller is better: nanobodies meet NMR

FEBS Letters, EarlyView.
Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley   +1 more source