Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Marco Venturini"'
Autor:
Sudheer Bhakare, Sara Dal Gesso, Marco Venturini, Dino Zardi, Laura Trentini, Michael Matiu, Marcello Petitta
Publikováno v:
Atmosphere, Vol 15, Iss 9, p 1085 (2024)
We compare three machine learning models—artificial neural network (ANN), random forest (RF), and convolutional neural network (CNN)—for spatial downscaling of temperature at 2 m above ground (T2M) from a 9 km ERA5-Land reanalysis to 1 km in a co
Externí odkaz:
https://doaj.org/article/fc8260c87ef54d02a5f949e79362a9b3
Autor:
Thorsten Hellert, Tynan Ford, Simon C. Leemann, Hiroshi Nishimura, Marco Venturini, Andrea Pollastro
Publikováno v:
Physical Review Accelerators and Beams, Vol 27, Iss 7, p 074602 (2024)
Past research at the Advanced Light Source (ALS) provided a proof-of-principle demonstration that deep learning methods could be effectively employed to compensate for the significant perturbations to the transverse electron beam size induced by user
Externí odkaz:
https://doaj.org/article/8887cfb73517470eb8bfe1e207034c63
Publikováno v:
Physical Review Accelerators and Beams, Vol 25, Iss 11, p 110701 (2022)
The ALS-U is the upgrade of the existing Lawrence Berkeley National Laboratory Advanced Light Source to a diffraction-limited soft x-ray light source. Here we present the lattice correction studies and commissioning simulations demonstrating that the
Externí odkaz:
https://doaj.org/article/a2be581e6d3b4b97971618ad085c78a9
Autor:
Inge Nelissen, Andrea Haase, Sergio Anguissola, Louise Rocks, An Jacobs, Hanny Willems, Christian Riebeling, Andreas Luch, Jean-Pascal Piret, Olivier Toussaint, Bénédicte Trouiller, Ghislaine Lacroix, Arno C. Gutleb, Servane Contal, Silvia Diabaté, Carsten Weiss, Tamara Lozano-Fernández, África González-Fernández, Maria Dusinska, Anna Huk, Vicki Stone, Nilesh Kanase, Marek Nocuń, Maciej Stępnik, Stefania Meschini, Maria Grazia Ammendolia, Nastassja Lewinski, Michael Riediker, Marco Venturini, Federico Benetti, Jan Topinka, Tana Brzicova, Silvia Milani, Joachim Rädler, Anna Salvati, Kenneth A. Dawson
Publikováno v:
Nanomaterials, Vol 10, Iss 8, p 1430 (2020)
The quality and relevance of nanosafety studies constitute major challenges to ensure their key role as a supporting tool in sustainable innovation, and subsequent competitive economic advantage. However, the number of apparently contradictory and in
Externí odkaz:
https://doaj.org/article/7bbb6b9c9ae5426994e519e7dde0336b
Autor:
Robert Warnock, Marco Venturini
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 6, p 064403 (2020)
We study the effect of a passive harmonic cavity, introduced to cause bunch lengthening, in an electron storage ring. We derive a formula for the induced voltage from such a cavity with high Q, excited by a sequence of bunches, allowing for arbitrary
Externí odkaz:
https://doaj.org/article/c2b4e708e8a44e9f8a9e9093d3af7d72
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 10, p 100702 (2019)
We present a new accelerator toolbox (AT)-based toolkit for simulating the commissioning of light-source storage rings. The toolkit provides a framework for supporting high-level scripts to represent with realism the various procedures (e.g., orbit a
Externí odkaz:
https://doaj.org/article/28e1ba2b0c284ab0bc464148f3a010c5
Autor:
Marco Venturini
Publikováno v:
Physical Review Accelerators and Beams, Vol 21, Iss 11, p 114404 (2018)
We introduce a perturbation-theory, mode-analysis method for longitudinal multibunch instabilities driven by the higher harmonic cavity (HHC) fundamental mode. The method, based on the exact solution of the unperturbed particle motion in the rf bucke
Externí odkaz:
https://doaj.org/article/5f6ac87a139f4f6bbfb2455eb12c25c4
Autor:
Marco Venturini
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 3, p 034401 (2008)
A 1D model of space-charge impedance, assuming a transversely uniform beam with circular cross section, has been proposed and is being extensively used in the modeling of the microbunching instability of relevance for the beam delivery systems of x-r
Externí odkaz:
https://doaj.org/article/705d0a214098459c8c6aca1c8c4f4709
Autor:
Marco Venturini
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 10, p 104401 (2007)
We apply a recently developed Vlasov solver to the study of the microbunching instability generated by shot noise in the beam delivery systems of x-ray free electron lasers (FELs). We discuss two lattices presently under consideration for the FEL Fer
Externí odkaz:
https://doaj.org/article/821136730ba940d0999c837885280b80
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 5, p 054403 (2007)
Direct numerical methods for solving the Vlasov equation offer some advantages over macroparticle simulations, as they do not suffer from the consequences of the statistical fluctuations inherent in using a number of macroparticles smaller than the b
Externí odkaz:
https://doaj.org/article/97e88c31971b457eb644b19a0d4146b9