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630
Some Physics Considerations for AHF Beam Profile Observation
"... This document will describe materials and devices that are being considered for observing and measuring beam profiles in AHF. This discussion deals primarily with the physics design of profile observing devices as opposed to engineering considerations. No decisions or recommendations are made here a ..."
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This document will describe materials and devices that are being considered for observing and measuring beam profiles in AHF. This discussion deals primarily with the physics design of profile observing devices as opposed to engineering considerations. No decisions or recommendations are made here
BEAM PROFILE MONITER BY ADAPTICE OPTICS
"... A beam profile monitor by the use of adaptive optics system was constructed and tested for the design study of SR monitor for B-factory. The Shack-Hartmann wavefront sensor was designed and constructed for a measurement of wavefront error caused by a deformation of an extraction mirror for visible s ..."
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A beam profile monitor by the use of adaptive optics system was constructed and tested for the design study of SR monitor for B-factory. The Shack-Hartmann wavefront sensor was designed and constructed for a measurement of wavefront error caused by a deformation of an extraction mirror for visible
Profile Measurements of Focusing Laser Beams
, 2009
"... Focused laser beams are commonly used in characterizing the intensity dependence of the optical properties of various materials. In order to compare the experimentally measured intensity dependence with theoretical predictions, it is vital that the focused beam maintains a characteristic Gaussian pr ..."
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focused beam compares to the expected Gaussian profile. Verification that our implementation of the knife-edge method works is given by a strong linear relationship between our observed data and a standard Gaussian integral, for the most part strong nonlinear direct fits of experimental response curves
Observation of Quill Effect induced by Distortion of Spatial Beam Profile
"... Abstract: Femtosecond laser modification was carried out for silica substrates using spatially distorted pulses. Modified lines were inscribed in the alternative scanning directions. Etching of the sample revealed significant difference in etching rate, representing Quill effect. Also, the etching r ..."
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rates were affected by the distortion of the spatial beam profile. These results suggest the possibility to control the characteristics of the modified region by controlling the beam profile. 1.
DIRECT OBSERVATION OF BEAM–BEAM INDUCED DYNAMICAL BETA BEATING AT HERA
"... The Hadron Electron Ring Anlage HERA at DESY pro-vides collisions between a 920 GeV proton beam and a 27.5 GeV electron beam in two interaction regions. The strong beam–beam force which mainly affects the electrons in-duces a tune shift together with a dynamical beta beat. The latter leads to a modi ..."
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modification of the transverse beam pro-file which can be observed in different profile monitors in HERA. The time–like evolution of the electron beam shape during luminosity tuning and before and after dump of the proton beam, averaged over all bunches, can be studied by means of a synchrotron radiation
A TURN BY TURN PHOTON BEAM PROFILE OBSERVATION BY A LASER BEAM SATURATED PHOTODIODE
"... A fast photodiode was demonstrated to be able to extract the turn by turn photon beam profile information of electron storage rings if the photodiode was operated at the saturated region. When applied this method to a 1.3 GeV synchrotron light source with 200 mA beam current, the synchrotron radiati ..."
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A fast photodiode was demonstrated to be able to extract the turn by turn photon beam profile information of electron storage rings if the photodiode was operated at the saturated region. When applied this method to a 1.3 GeV synchrotron light source with 200 mA beam current, the synchrotron
OPTICAL TRANSVERSE BEAM PROFILE MEASUREMENTS FOR HIGH POWER PROTON BEAMS
"... High Power Proton Accelerator (H.P.P.A.) projects are being proposed in fundamental and applied physics research: radioactive beam production, neutron sources, neutrino factories and transmutation. The front end design of these accelerators is based on a high intensity ion source (several mA up to 1 ..."
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A) have been measured. However, several difficulties emerge to explain the difference shape between the transverse beam profiles deduced from the elementary observation of the emitted light by a C.C.D. camera, a grid profiler (low duty cycle operation) and a residual gas profiler, respectively. More
Turn-by-Turn Imaging of the Transverse Beam Profile
- in PEP-II,” BIW06
, 2006
"... During injection or instability, the transverse profile of an individual bunch in a storage ring can change significantly in a few turns. However, most synchrotron-light imaging techniques are not designed for this time scale. We have developed a novel diagnostic that enhances the utility of a fast ..."
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gated camera by adding, inexpensively, some features of a dual-axis streak camera, in order to watch the turn-by-turn evolution of the transverse profile, in both x and y. The beam’s elliptical profile is reshaped using cylindrical lenses to form a tall and narrow ellipse—essentially the projection
Beam profile and beam time structure monitors for the extracted beams from the Ganil cyclotrons.
"... Abstract: We have developed different beam monitors for the full energy and intensity range of the Ganil beams. The secondary emission monitors (EMS) are used in the range of 108- 1011 pps, while multiwire gas chambers are used for beam intensities in between 102 and 108 pps. Both monitors provide t ..."
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.5 mm), depends on the observed beam size. They are used in the 1 to 300 nAe beam intensity range, and for beam energies ranging from a few KeV/u up to 100 MeV/u. 150 such S.E.M. are installed all along the beam transfer lines _ between the 3 GANlL cyclotrons and on the experimental areas. GAS PROFILE
SEE PROFILE
, 2013
"... We experimentally demonstrated Bessel-like beams utilizing digital micromirror device (DMD). DMD with images imitating the equivalent axicon can shape the collimated Gaussian beam into Bessel beam. We reconstructed the 3D spatial field of the generated beam through a stack of measured cross-sectiona ..."
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-sectional images. The output beams have the profile of Bessel function after intensity modulation, and the beams extend at least 50mmwhile the lateral dimension of the spot remains nearly invariant. Furthermore, the self-healing property has also been investigated, and all the experimental results agree well
Results 1 - 10
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