Development of an experimental facility for the study of microparticle initiated radio frequency vacuum breakdown

2021 ◽  
Vol 92 (1) ◽  
pp. 013508
Author(s):  
R. Casagrande ◽  
H. Faugel ◽  
F. Fischer ◽  
H. Fünfgelder ◽  
F. Riedl ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Experimental Facility ◽  
Vacuum Breakdown

scholarly journals Mechanism of vacuum breakdown in radio-frequency accelerating structures

2018 ◽  
Vol 21 (6) ◽  
Author(s):  
S. A. Barengolts ◽  
V. G. Mesyats ◽  
V. I. Oreshkin ◽  
E. V. Oreshkin ◽  
K. V. Khishchenko ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Vacuum Breakdown

scholarly journals Simulation study of direct current vacuum breakdown and its application to high-gradient accelerating structures

2020 ◽  
Vol 35 (1) ◽  
pp. 30-35
Author(s):  
Marija Radmilovic-Radjenovic ◽  
Branislav Radjenovic
Keyword(s):  
Radio Frequency ◽  
Direct Current ◽  
Scaling Laws ◽  
Electrical Breakdown ◽  
Pulse Length ◽  
Breakdown Rate ◽  
High Gradient ◽  
Vacuum Breakdown ◽  
Comsol Simulation ◽  
Vacuum Gaps

It is well known that radio frequency breakdown is one of the main limitations in high frequency accelerators. Similarities have been detected between breakdowns in direct current vacuum gaps and those in superconducting radio frequency cavities. Therefore, cavity break- downs due to electric field phenomena can be understood by studying direct current vacuum breakdowns. Significant irregularity of a surface and a variety of involved processes objectively stipulate a number of factors which may lead to a breakdown. In this paper, the effects of surface conditions, accelerator gradient, pulse length, and operating frequency on the breakdown have been studied by using COMSOL simulation package. It was found that the dependence of breakdown rate on accelerating gradient and pulse length follows scaling laws. Based on the time evolutions of electron density and the potential in cone-cylinder electrode configuration at the pressure of 0.1 Pa, the time scale of a vacuum breakdown has been established. It was also confirmed that the emission from an electrode surface can be regarded as a major factor leading to electrical breakdown in vacuum. The obtained results could be very useful in high-gradient accelerating structures.

46: Intermediate Follow-Up Comparison between Partial Nephrectomy and Radio Frequency Ablation in T1A Renal Tumors

2006 ◽  
Vol 175 (4S) ◽  
pp. 16-16 ◽  
Author(s):  
Joshua M. Stern ◽  
Robert S. Svatek ◽  
Sangtae Park ◽  
J. Kyle Anderson ◽  
Yair Lotan ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Partial Nephrectomy ◽  
Radio Frequency Ablation ◽  
Renal Tumors

1913: The Radiographic Evolution of Radio Frequency Ablated Renal Lesions

2004 ◽  
Vol 171 (4S) ◽  
pp. 505-505
Author(s):  
Edward D. Matsumoto ◽  
Lori Watumall ◽  
D. Brooke Johnson ◽  
Kenneth Ogan ◽  
Grant D. Taylor ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Renal Lesions
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