Results 11 to 20 of about 395,934 (297)

PULSED POWER TO MICROWAVES CONVERSION IN NONLINEAR TRANSMISSION LINES [PDF]

Radio Physics and Radio Astronomy, 2021
Purpose: Experimental results and numerical simulations are presented, concerning effects of microwave generation in coaxial transmission lines which are fed with unipolar, high voltage electric pulses.
S. Y. Karelin, V. G. Korenev, V. B. Krasovitsky, A. N. Lebedenko, I. I. Magda, V. S. Mukhin, V. G. Sinitsin, N. V. Volovenko   +7 more
doaj   +1 more source

The cryogenic control system of BEPCII

EPJ Techniques and Instrumentation, 2021
The BEPCII project is for upgrading the Beijing Electron Positron Collider to reach a higher luminosity. The cryogenic system has been firstly designed and deployed in BEPCII, which provides cooling capacity for SRF cavities, SCQ and SSM.
Gang Li, Rui Ye, Mingjing Sang, Shaopeng Li, Zhuo Zhang, Jiehao Zhang, Ruixiong Han, Ge Lei, Rui Ge   +8 more
doaj   +1 more source

The accelerated acceleration of the universe [PDF]

Journal of Cosmology and Astroparticle Physics, 2006
We present a simple mechanism which can mimic dark energy with an equation of state w < -1 as deduced from the supernova data. We imagine that the universe is accelerating under the control of a quintessence field, which is moving up a very gently sloping potential.
John Terning, Nemanja Kaloper, Csaba Csáki   +2 more
openaire   +3 more sources

Critical appraisal of the European Union Scientific Committee on Health, Environmental and Emerging Risks (SCHEER) Preliminary Opinion on electronic cigarettes

Harm Reduction Journal, 2021
Background In preparation for the 2021 revision of the European Union Tobacco Products Directive, the Scientific Committee on Health, Environmental and Emerging Risks (SCHEER) has posted its Preliminary Opinion on Electronic Cigarettes.
Renée O’Leary, Riccardo Polosa, Giovanni Li Volti, the Center of Excellence for the Acceleration of Harm Reduction (CoEHAR)   +3 more
doaj   +1 more source

Accelerators and the Accelerator Community [PDF]

Reviews of Accelerator Science and Technology, 2008
In this paper, standing back — looking from afar — and adopting a historical perspective, the field of accelerator science is examined. The subjects explored are: how it grew, what were the forces that made it what it is, where it is now, and what it is likely to be in the future. Clearly, many personal opinions, are offered in this process.
Malamud, Ernest, Sessler, Andrew
openaire   +2 more sources

Study on Internal Strain Distribution of the High-Field Nb₃Sn Superconducting Accelerator Magnets With Homogenization Theory

IEEE Access, 2022
To fabricate 10–16 Tesla high-field accelerator magnets, the high-Jc Nb3Sn superconductor is one of the most practical choices. However, it is a brittle material and is strain-sensitive.
Zhen Zhang, Qingjin Xu
doaj   +1 more source

Accelerating solitons [PDF]

Physical Review D, 2020
We present the saddle-point approximation for the effective Hamiltonian of the quantum kink in two-dimensional linear sigma models to all orders in the time-derivative expansion. We show how the effective Hamiltonian can be used to obtain semiclassical soliton form factors, valid at momentum transfers of order the soliton mass.
Ilarion V. Melnikov, Constantinos Papageorgakis, Andrew B. Royston   +2 more
openaire   +2 more sources

New measurements of 92Mo(γ, n) and (γ, 3n) reactions using laser-driven bremsstrahlung γ-ray

Frontiers in Physics, 2023
The flux-weighted average cross sections and isomeric ratios of 92Mo(γ, n)91m,gMo and 92Mo(γ, 3n)89Mo reactions were measured through activation methods.
D. Wu, D. Wu, H. Y. Lan, H. Y. Lan, J. Y. Zhang, J. Y. Zhang, J. X. Liu, J. X. Liu, H. G. Lu, H. G. Lu, J. F. Lv, J. F. Lv, X. Z. Wu, X. Z. Wu, H. Zhang, H. Zhang, J. Cai, J. Cai, X. L. Xu, X. L. Xu, Y. X. Geng, Y. X. Geng, W. J. Ma, W. J. Ma, C. Lin, C. Lin, Y. Y. Zhao, Y. Y. Zhao, H. R. Wang, F. L. Liu, C. Y. He, J. Q. Yu, B. Guo, N. Y. Wang, X. Q. Yan, X. Q. Yan   +35 more
doaj   +1 more source

Accelerating decay with acceleration

, 2023
We investigate accelerated Unruh-deWitt detectors as a model for particle decay. We find non-trivial decay rates, including a pattern of peaks in decay rate that extends to lower accelerations. Applying our model to the alpha decay of $\mathrm{^{210}Po}$, we find that effects could be observed with an acceleration of $a\approx 10^{26} \frac{\mathrm{m}}{
Beenakker, Wim, Venhoek, David
openaire   +2 more sources

Peculiar acceleration [PDF]

Physics Letters B, 2008
It has been proposed recently to observe the change in cosmological redshift of distant galaxies or quasars with the next generation of large telescope and ultra-stable spectrographs (the so-called Sandage-Loeb test). Here we investigate the possibility of observing the change in peculiar velocity in nearby clusters and galaxies.
Amendola, Luca, BALBI, AMEDEO, Quercellini, Claudia   +2 more
openaire   +4 more sources