نتایج جستجو برای: fixed beam
تعداد نتایج: 308995 فیلتر نتایج به سال:
PURPOSE The purpose of this article is to present the first imaging experiments to demonstrate the functional equivalence between a conventional rotational gantry and a fixed-beam imaging geometry, and the feasibility of an iterative image-reconstruction technique under gravitational deformation. METHODS AND MATERIALS Experiments were performed using an Elekta Axesse with Agility MLC and XVI,...
In this section, we introduce some techniques for implementing the beam routing, and collision avoidance in the recievers. Each node has a beam router, such as a computer generated hologram or a deformable mirror, which is capable of redirecting k (or 1 in the single-port model) optical beams concurrently. The reconfiguration (programming the computer generated hologram, or deforming the mirror...
LLE Review, Volume 70 51 The OMEGA laser has sustained approximately 1000 target shots over its first 18 months of operation without significant damage to the optics. Both rod and disk amplifiers are used in the OMEGA laser chain; after each amplification stage at 1ω the beams are spatially filtered to remove high-spatial-frequency noise in the beam and to ensure correct image relaying. Optical...
Abstract: Tilt beam characteristic by changing the length of finite-sized square dielectric substrate of one arm rectangular spiral antenna has been investigated. Rectangular spiral is printed on a finite sized dielectric substrate (εr=3.27) backed by a finite-sized conducting plane. Rectangular spiral radiates in Right Handed Circular Polarization (RHCP). Horizontal spiral arm length (HL) is v...
A new beam transport system has been designed to bring the 210 MeV proton beam from the Indiana University Cyclotron to four proton therapy treatment rooms. The main trunk line will be achromatic and employ a fast beam splitting system to allow treatments simultaneously in different treatment areas. To enhance flexibility of operation, each treatment room will have its own energy degrader and e...
The performance, and resulting economic, advantage offered by tracking systems for photovoltaic systems has not been third-party verified. Consumers are forced to rely on tracking manufacturer’s claims which are up to 30% additional energy. We report on a side-by-side comparison of two nominally identical PV/microinverter systems; one at a fixed latitude tilt, and one on a 1-axis Zomeworks pass...
HERA-B is a fixed target experiment dedicated to study CP violation in the decay of neutral B mesons into the ”gold platted” decay mode B0 ! J= K0 S . An internal target in the halo of the 820 GeV HERA proton beam provides the source of B mesons in high rate fixed target protonnucleus interactions. The target collects very efficiently the protons, before they get lost on any aperture limitation...
Registration of patient anatomical structures to the reference position is a basic part of the patient set-up procedure. Registration of anatomical structures between the site of beam entrance on the patient surface and the distal target position is particularly important. Here, to improve patient positional accuracy during set-up for particle beam treatment, we propose a new visualization meth...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید