Untersuchungen an Kratern von Mikroprojektilen im Geschwindigkeitsbereich von 0,5 bis 10 km/sec

1969 ◽  
Vol 24 (3) ◽  
pp. 326-331 ◽  
Author(s):  
V. Rudolph
Keyword(s):  
Electron Microscope ◽  
Target Material ◽  
Crater Diameter ◽  
Graaff Accelerator ◽  
Silver Copper ◽  
Van De Graaff

AbstractIron spheres of μ-size were accelerated by a modified 2 MV Van de Graaff accelerator to velocities from 0.5 to 10 km/sec. With these particles craters were produced in metal targets. The dimensions of the craters were measured by an electron microscope (Stereoscan). Systematical measurements were made for lead, cadmium, silver, copper and aluminum targets. The dependence of the crater diameter, depth and volume as function of the mass and the velocity of the projectile and of the target material is described.

Specimen Preparation of Near Surface Ion Irradiated Samples

1985 ◽  
Vol 43 ◽  
pp. 170-171
Author(s):  
K. F. Russell ◽  
L. L. Horton
Keyword(s):  
Radiation Damage ◽  
Heavy Ions ◽  
Target Material ◽  
Metal Alloys ◽  
Specimen Surface ◽  
Specimen Preparation ◽  
Particle Accelerators ◽  
Near Surface ◽  
Graaff Accelerator ◽  
Van De Graaff

Beams of heavy ions from particle accelerators are used to produce radiation damage in metal alloys. The damaged layer extends several microns below the surface of the specimen with the maximum damage and depth dependent upon the energy of the ions, type of ions, and target material. Using 4 MeV heavy ions from a Van de Graaff accelerator causes peak damage approximately 1 μm below the specimen surface. To study this area, it is necessary to remove a thickness of approximately 1 μm of damaged metal from the surface (referred to as “sectioning“) and to electropolish this region to electron transparency from the unirradiated surface (referred to as “backthinning“). We have developed electropolishing techniques to obtain electron transparent regions at any depth below the surface of a standard TEM disk. These techniques may be applied wherever TEM information is needed at a specific subsurface position.

Microparticle acceleration by a Van de Graaff accelerator and application to space and material sciences

2001 ◽  
Vol 60 (4-5) ◽  
pp. 277-282 ◽  
Author(s):  
Hiromi Shibata ◽  
Koichi Kobayashi ◽  
Takeo Iwai ◽  
Yoshimi Hamabe ◽  
Sho Sasaki ◽  
...  
Keyword(s):  
Graaff Accelerator ◽  
Material Sciences ◽  
Van De Graaff

Restoration of the radio frequency ion source of the 5.5 MV CN-Van de Graaff accelerator at IFUNAM

2021 ◽  
Vol 16 (08) ◽  
pp. T08013
Author(s):  
C.G. Puigvert-Angulo ◽  
R. Espejel ◽  
C. Valencia ◽  
A.O. Valdez-Guerrero ◽  
J. Mas-Ruiz ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Ion Source ◽  
Graaff Accelerator ◽  
Van De Graaff

A 0.2 ns Beam Pulse for the 6 MV van de Graaff Accelerator

1983 ◽  
pp. 847-848
Author(s):  
J. J. Kritzinger ◽  
W. R. McMurray ◽  
C. V. Wikner ◽  
T. Swart ◽  
H. Schmitt
Keyword(s):  
Graaff Accelerator ◽  
Van De Graaff
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