New PXIe-based LLRF architecture and test bench for heavy ion linear acceleration

Author(s):  
I. Badillo ◽  
J. Jugo ◽  
J. Portilla ◽  
J. Feutchwanger ◽  
C. San Vicente ◽  
...  
2015 ◽  
Vol 62 (3) ◽  
pp. 963-971 ◽  
Author(s):  
I. Badillo ◽  
J. Jugo ◽  
J. Portilla ◽  
J. Feuchtwanger ◽  
C. San Vicente ◽  
...  

2008 ◽  
Author(s):  
I. Bondarenko ◽  
A. Chmyga ◽  
G. Deshko ◽  
A. Komarov ◽  
A. Kozachek ◽  
...  

Author(s):  
I.A. Lobastov ◽  
A.V. Paleshkin

We selected the main parameters for a new layout of a centrifugal installation featuring a linear motor and magnetic suspension. Since existing test benches for simulating linear accelerations have a range of disadvantages, we propose to consider an alternative to the classical layout, in particular, to reject the rotary link and replace it by a ring-like path structure with a linear motor, along which a trolley carrying the object under investigation will move on a magnetic suspension. We analysed various spatial stabilisation systems for the trolley moving at high velocities. We defined the key initial data, taking into account descent into planetary atmospheres, design specifics of products subjected to G-forces and existing centrifugal installations. We computed the parameters of a magnetic suspension based on high-temperature superconducting yttrium ceramics and electrical engineering parameters of the linear motor, and carried out strength calculations for the movable part of the test bench using the Femap with NX Nastran software package, accounting for the operational loads intended. The paper presents an option for implementing a new structural layout of an experimental installation that ensures linear acceleration testing in various operation modes


1988 ◽  
Vol 102 ◽  
pp. 339-342
Author(s):  
J.M. Laming ◽  
J.D. Silver ◽  
R. Barnsley ◽  
J. Dunn ◽  
K.D. Evans ◽  
...  

AbstractNew observations of x-ray spectra from foil-excited heavy ion beams are reported. By observing the target in a direction along the beam axis, an improvement in spectral resolution, δλ/λ, by about a factor of two is achieved, due to the reduced Doppler broadening in this geometry.


Author(s):  
L.E. Murr

The production of void lattices in metals as a result of displacement damage associated with high energy and heavy ion bombardment is now well documented. More recently, Murr has shown that a void lattice can be developed in natural (colored) fluorites observed in the transmission electron microscope. These were the first observations of a void lattice in an irradiated nonmetal, and the first, direct observations of color-center aggregates. Clinard, et al. have also recently observed a void lattice (described as a high density of aligned "pores") in neutron irradiated Al2O3 and Y2O3. In this latter work, itwas pointed out that in order that a cavity be formed,a near-stoichiometric ratio of cation and anion vacancies must aggregate. It was reasoned that two other alternatives to explain the pores were cation metal colloids and highpressure anion gas bubbles.Evans has proposed that void lattices result from the presence of a pre-existing impurity lattice, and predicted that the formation of a void lattice should restrict swelling in irradiated materials because it represents a state of saturation.


Author(s):  
Charles W. Allen ◽  
Robert C. Birtcher

The uranium silicides, including U3Si, are under study as candidate low enrichment nuclear fuels. Ion beam simulations of the in-reactor behavior of such materials are performed because a similar damage structure can be produced in hours by energetic heavy ions which requires years in actual reactor tests. This contribution treats one aspect of the microstructural behavior of U3Si under high energy electron irradiation and low dose energetic heavy ion irradiation and is based on in situ experiments, performed at the HVEM-Tandem User Facility at Argonne National Laboratory. This Facility interfaces a 2 MV Tandem ion accelerator and a 0.6 MV ion implanter to a 1.2 MeV AEI high voltage electron microscope, which allows a wide variety of in situ ion beam experiments to be performed with simultaneous irradiation and electron microscopy or diffraction.At elevated temperatures, U3Si exhibits the ordered AuCu3 structure. On cooling below 1058 K, the intermetallic transforms, evidently martensitically, to a body-centered tetragonal structure (alternatively, the structure may be described as face-centered tetragonal, which would be fcc except for a 1 pet tetragonal distortion). Mechanical twinning accompanies the transformation; however, diferences between electron diffraction patterns from twinned and non-twinned martensite plates could not be distinguished.


2002 ◽  
Vol 82 (11) ◽  
pp. 2333-2339
Author(s):  
G. Schumacher ◽  
R. C. Birtcher ◽  
D. P. Renusch ◽  
M. Grimsditch ◽  
L. E. Rehn

1996 ◽  
Vol 21 (5) ◽  
pp. 461-502 ◽  
Author(s):  
E. Suraud

1971 ◽  
Vol 32 (1) ◽  
pp. 7-9 ◽  
Author(s):  
J. Galin ◽  
D. Guerreau ◽  
M. Lefort ◽  
X. Tarrago

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