Results 41 to 50 of about 132,007 (268)

Effect of terahertz irradiation on DNA damage repair in living cells

FEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno, Shota Yamazaki, Hiromichi Hoshina, Masahiko Harata   +3 more
wiley   +1 more source

Density distributions of tune shifts from space charge or beam-beam interactions in Gaussian bunches

Physical Review Accelerators and Beams, 2023
The amplitude dependent tune shifts from either space charge or beam-beam interactions are calculated analytically with the inclusion of synchrotron oscillations and multiple interactions around the ring.
Tanaji Sen
doaj   +1 more source

A map for the thick beam-beam interaction [PDF]

Proceedings Particle Accelerator Conference, 2002
We give a closed-form expression for the thick beam-beam interaction for a small disruption parameter, as typical in electron-positron storage rings. The dependence on transverse angle and position of the particle trajectory as well as the longitudinal position of collision and the waist-modified shape of the beam distribution are included.
Irwin, J., Chen, T.
openaire   +1 more source

Optimizing photoexcitation conditions for time‐resolved X‐ray solution scattering experiments

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering (TR‐XSS) is a powerful technique to visualize how proteins change their structure in real time after light activation. Selecting the right laser photoexcitation conditions—fluence, excitation geometry, and sample refresh rate—is critical to maximize the experimental signal while avoiding unwanted side effects ...
Matteo Levantino
wiley   +1 more source

Probing strong-field QED in beam-plasma collisions

Communications Physics, 2023
Ongoing progress in laser and accelerator technology opens new possibilities in high-field science, notably to investigate the largely unexplored strong-field quantum electrodynamics (SFQED) regime where electron-positron pairs can be created directly ...
Aimé Matheron, Pablo San Miguel Claveria, Robert Ariniello, Henrik Ekerfelt, Frederico Fiuza, Spencer Gessner, Max F. Gilljohann, Mark J. Hogan, Christoph H. Keitel, Alexander Knetsch, Mike Litos, Yuliia Mankovska, Samuele Montefiori, Zan Nie, Brendan O’Shea, J. Ryan Peterson, Doug Storey, Yipeng Wu, Xinlu Xu, Viktoriia Zakharova, Xavier Davoine, Laurent Gremillet, Matteo Tamburini, Sébastien Corde   +23 more
doaj   +1 more source

Monte Carlo-based analysis of the photon beam fluence with air gap thickness between Linac head exit window and patient’s skin in radiotherapy treatments [PDF]

Ядерна фізика та енергетика, 2020
Linear accelerators (Linac) are used in radiation therapy treatment and its technology improvement ensures high dosimetry quality that should be conserved for high radiotherapy efficiency.
Mohamed Bencheikh, Abdelmajid Maghnouj, Jaouad Tajmouati   +2 more
doaj   +1 more source

Purification and preparation of Marchantia polymorpha Auxin Response Factor 2 for phase separation studies

FEBS Open Bio, EarlyView.
We describe detailed protocols for the purification and preparation of Marchantia polymorpha Auxin Response Factor 2 (MpARF2). This protein is fused to an MBP solubility tag and an mNG fluorescent tag and is purified from Escherichia coli. The presented procedures make it possible to study MpARF2 assemblies, which could arise from phase separation ...
Bas Janssen, Robin Romein, Willy A. M. van den Berg, Simon Lindhoud, Jan Willem Borst, Carlo P. M. van Mierlo   +5 more
wiley   +1 more source

Combined phenomena of beam-beam and beam-electron cloud interactionsin circular e^{+}e^{-} colliders

Physical Review Special Topics. Accelerators and Beams, 2002
An electron cloud causes various effects in high intensity positron storage rings. The positron beam and the electron cloud can be considered a typical two-stream system with a certain plasma frequency.
Kazuhito Ohmi, Alexander W. Chao
doaj   +1 more source

Tungsten surface enrichment in EUROFER and Fe-W model systems studied by high-resolution time-of-flight rutherford backscattering spectroscopy

Nuclear Materials and Energy, 2018
Time-of-flight Rutherford backscattering spectroscopy (ToF-RBS) with incident heavy ions offers a substantially improved depth resolution compared to conventional RBS with incident He ions.
M. Mayer, T.F. Silva, R. Arredondo, M. Balden, I. Bogdanović-Radović, T. Höschen, H. Maier, M. Oberkofler, L. Ru, Z. Siketić   +9 more
doaj   +1 more source

Stratonovich expansion and beam-beam interaction [PDF]

Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology, 2003
A general approach is proposed for the study of coherent phenomena in electron storage rings due to a localized nonlinear force. The approach is based on expanding the distribution function into a series using generalized Hermite polynomials in two dimensions (Stratonovich expansion).
openaire   +1 more source