When using a low emittance storage ring as a high brightness synchrotron radiation source, it is critical to maintain a very high degree of orbit stability, both for the short term and for the duration of an operational fill. A fill-to-fill reproducibility is an additional important requirement. Recent developments in orbit correction algorithms have provided tools that are capable of achieving...

P. Tenenbaum, D. Burke, S. Hartman, R. Helm, J. Irwin, R. Iverson, P. Raimondi, W. Spence Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 USA V. Bharadwaj, M. Halling, J. Holt Fermi National Accelerator Laboratory, Batavia, Illinois, USA J. Buon, J. Jeanjean, F. Le Diberder, V. Lepeltier, P. Puzo** Laboratoire de l’Accélérateur Linéaire, Orsay, France K. Oide, T. Shi...

PURPOSE Since the first publications on intensity modulated radiation therapy (IMRT) in the early 1980s almost all efforts have been focused on fairly time consuming dynamic or segmental multileaf collimation. With narrow fast scanned photon beams, the flexibility and accuracy in beam shaping increases, not least in combination with fast penumbra trimming multileaf collimators. Previously, expe...

Purpose To investigate narrow, elongated magnetically focused proton beams and compare their properties with passively collimated beams using Monte Carlo simulation. METHODS We performed Geant4 Monte Carlo simulations involving a single quadrapole focusing magnet, thereby creating a flattened beam with an elongated elliptical cross section. The parameters of the magnet were chosen to mimic k=...

Recently, one fast radio burst (FRB), FRB 200428, was detected from the Galactic magnetar soft gamma-ray repeater (SGR) J1935+2154 during X-ray burst. This suggests that magnetars can make FRBs. On other hand, majority of bursts SGR are not associated with One possible reason for such rarity FRB–SGR–burst associations is emission much more narrowly beamed than SGR–burst emission. If an interpre...

The presentation discusses the requirements on the characteristics of antenna and RFsubsystem of a FMCW Imaging Radar with respect to the dynamic range and presents the design of an advanced demonstrator. The discussion is based on experience with the HiVision-Radar system /1/ which observes the ground from an elevated position (e.g. airborne platform, see also /2/) and employs a frequency scan...

We suggest a new approach for selective trapping of light absorbing particles in gases by multiple optical bottle-beam-like traps created by volume speckle field. We demonstrate stable simultaneous confinement of a few thousand micro-particles in air with a single lowpower laser beam. The size distribution of trapped particles exhibits a narrow peak near the average size of an optical speckle. ...

FASER, or the Forward Search Experiment, is a new experiment at CERN designed to complement LHC’s ongoing physics program, extending its discovery potential light and weakly interacting particles that may be produced copiously LHC in far-forward region. New targeted by such as long-lived dark photons axion-like particles, are characterised signature with two oppositely charged tracks multi-TeV ...

In order to optimize tunability and backgrounds in linear collider final focus systems, it is necessary to align strong quadrupole and sextupole magnets with beam-based measurements. Algorithms for alignment have been used successfully on the Final Focus Test Beam (FFTB) beamline at SLAC. Quadrupole magnets were aligned using a shunt technique, with resolutions from 50 microns down to 700 nanom...

Exercise has been considered to affect the functional recovery from central nervous damage. Neurotrophic factors have various effects on brain damage. However, the effects of exercise for expression of GDNF on functional recovery with brain damage are not well known. We investigated the difference in functional recovery between non-exercise and beam-walking exercise groups, and the expression o...