Considerations regarding the efficiency of high power RF sources for particle accelerators

2002 ◽  
Author(s):  
G. Clerc ◽  
C. Bearzatto ◽  
M. Bres ◽  
G. Faillon ◽  
Ph. Guidee
Keyword(s):  
High Power ◽  
Particle Accelerators

scholarly journals Decommissioning and Safety Issues of Liquid-Mercury Waste Generated from High-Power Spallation Sources with Particle Accelerators

2009 ◽  
Vol 168 (2) ◽  
pp. 264-269
Author(s):  
S. Chiriki ◽  
J. Fachinger ◽  
R. Moormann ◽  
H.-K. Hinssen ◽  
A. Bukaemskiy ◽  
...  
Keyword(s):  
High Power ◽  
Particle Accelerators ◽  
Safety Issues ◽  
Liquid Mercury

scholarly journals A reflexing electron microwave amplifier for rf particle accelerator applications

1988 ◽  
Vol 6 (3) ◽  
pp. 613-620
Author(s):  
M. V. Fazio ◽  
R. F. Hoeberling
Keyword(s):  
High Power ◽  
Microwave Power ◽  
Phase Locking ◽  
Pulse Length ◽  
Low Frequency ◽  
Particle Accelerator ◽  
Particle Accelerators ◽  
Power Sources ◽  
Microwave Amplifier ◽  
Very High

The evolution of rf-accelerator technology toward high-power, high-current, lowemittance beams produces an ever-increasing demand for efficient, very high power microwave power sources. The present klystron technology has performed very well but is not expected to produce reliable gigawatt peak-power units in the 1- to 10-GHz regime. Further major advancements must involve other types of sources. The reflexing-electron class of sources can produce microwave powers at the gigawatt level and has demonstrated operation from 800-MHz to 40-GHz. The pulse length appears to be limited by diode closure, and reflexing-electron devices have been operated in a repetitively pulsed mode. A design is presented for a reflexing electron microwave amplifier that is frequency and phase locked. In this design, the generated microwave power can be efficiently coupled to one or several accelerator loads. Frequency and phase-locking capability may permit parallel-source operation for higher power. The low-frequency (500-MHz to 10-GHz) operation at very high power required by present and proposed microwave particle accelerators makes an amplifier, based on reflexing electron phenomena, a candidate for the development of new accelerator power sources.

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.

Dynamic Modeling and Wear-Based Remaining Useful Life Prediction of High Power Clutch Systems

2005 ◽  
Vol 48 (2) ◽  
pp. 208-217 ◽  
Author(s):  
Matthew Watson ◽  
Carl Byington ◽  
Douglas Edwards ◽  
Sanket Amin
Keyword(s):  
Dynamic Modeling ◽  
High Power ◽  
Life Prediction ◽  
Remaining Useful Life ◽  
Useful Life
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