Results 101 to 110 of about 308,095 (334)

Empirical comparison of high gradient achievement for different metals in DC and pulsed mode

, 2010
For the SwissFEL project, an advanced high gradient low emittance gun is under development. Reliable operation with an electric field, preferably above 125 MV/m at a 4 mm gap, in the presence of an UV laser beam, has to be achieved in a diode ...
Ashfold M. N. R., C. Gough, C. Hauri, CERN Accelerator School (CAS), Clendenin J. E., Descoeudres A., F. Le Pimpec, Loehl F., Lorusso A., M. Paraliev, Oppelt A., Paraliev M., Paraliev M., Paraliev M., Pedrozzi M., R. Ganter, Rodriguez J., S. Ivkovic, Schäfer C., Shintake T., Sinclair C. K., Smedley J., Tsujino S., Vyuga D. A., Wang T.   +24 more
core   +1 more source

Ultrahigh Piezoelectricity in Truss‐Based Ferroelectric Ceramics Metamaterials

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
By leveraging the unique combination of polarization direction and loading state, ultrahigh piezoelectricity is achieved through careful tuning of the relative density and scaling ratio in truss‐based ferroelectric metamaterials. This approach enables the simultaneous realization of extremely high piezoelectric constants and ultralow dielectric ...
Jiahao Shi, Kang Ju, Haoyu Chen, Valérie Orsat, Agus P. Sasmito, Ali Ahmadi, Abdolhamid Akbarzadeh   +6 more
wiley   +1 more source

Harnessing Outer Space for Improved Electrocaloric Cooling

Advanced Functional Materials, EarlyView.
A novel radiative heat sink/source‐integrated electrocaloric (R‐iEC) system combines the electrocaloric (EC) effect with a thermally conductive radiative cooler (TCRC) to address heat dissipation limitations in EC devices. Utilizing outer space as a heat sink, the system achieves up to 240 W m−2 of heat dissipation performance, making it highly ...
Dong Hyun Seo, Hyung Rae Kim, Joo Ho Yun, Hyunkyu Kwak, Do Hyeon Kim, Se‐Yeon Heo, Rujun Ma, Gil Ju Lee, Young Min Song   +8 more
wiley   +1 more source

The impact of XLPE surface defects on electric field and breakdown voltage

Frontiers in Energy Research
During the construction of cable joints, three common defects may occur on the XLPE surface: scratches, moisture exposure, and adhered contaminated particles.
Guanghua He, Wei Zhang, Ke Sun, Jinlong Qi, Jiahao Zhao, Jiayi Han, Xiaoshuai Zhu   +6 more
doaj   +1 more source

Phase-field modeling and machine learning of electric-thermal-mechanical breakdown of polymer-based dielectrics

Nature Communications, 2019
Polymer dielectrics are promising for high-density energy storage but dielectric breakdown is poorly understood. Here, a phase-field model is developed to investigate electric, thermal, and mechanical effects in the breakdown process for a range of ...
Zhong-Hui Shen, Jian-Jun Wang, Jian-Yong Jiang, Sharon X. Huang, Yuan-Hua Lin, Ce-Wen Nan, Long-Qing Chen, Yang Shen   +7 more
doaj   +1 more source

Terahertz‐Driven Ultrafast Dynamics of Rare‐Earth Nickelates by Controlling Only the Charge Degree of Freedom

Advanced Functional Materials, EarlyView.
The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati, Sergey Kovalev, Igor Ilyakov, Atiqa Arshad, Gaurav Dubey, Ketan S. Navale, Dhanvir Singh Rana, Jan‐Christoph Deinert   +7 more
wiley   +1 more source

Electrical Breakdown of Excitonic Insulators

Physical Review X
We propose a new electrical breakdown mechanism for exciton insulators in the BCS limit, which differs fundamentally from the Zener breakdown mechanism observed in traditional band insulators. Our new mechanism results from the instability of the many-body ground state for exciton condensation, caused by the strong competition between the polarization ...
Yuelin Shao, Xi Dai
openaire   +3 more sources

Strategies to Design and Optimize Artificial Antigen‐Presenting Cells for T Cell Expansion in Cancer Immunotherapy

Advanced Functional Materials, EarlyView.
This review highlights recent advances in engineering artificial antigen‐presenting cells (aAPCs) as alternatives to dendritic cells for T cell expansion. Key design principles inspired by the immunological synapse are discussed, with emphasis on strategies for polyclonal and antigen‐specific T cell expansion.
Nguyen Thi Nguyen, Yu Seok Youn
wiley   +1 more source

Simulation and Analysis of Electric Thermal Coupling for Corrosion Damage of Metro Traction Motor Bearings

Machines
With the electrification of generator sets, electric locomotives, new energy vehicles, and other industries, AC motors subject bearings to an electric field environment, leading to galvanic corrosion due to the use of variable frequency power supply ...
Haisheng Yang, Zhanwang Shi, Xuelan Wang, Jiahang Zhang, Run Zhang, Hengdi Wang   +5 more
doaj   +1 more source

Lightning impulse tests on air-breakdown level in point-plane electrode configuration [PDF]

, 2014
In the past several decades, extensive amount of research work has been done to understand the fundamental characteristics of the electrical breakdown.
Che Mok @ Adnan, Mohd Dasri
core