Abstract
We are developing a model of arcing to explain breakdown phenomena in high-gradient rf systems used for particle accelerators. This model assumes that arcs develop as a result of mechanical failure of the surface due to electric tensile stress, ionization of fragments by field emission, and the development of a small, dense plasma that interacts with the surface primarily through self sputtering and terminates as a unipolar arc capable of producing field emitters with high enhancement factors. We are modeling these mechanisms using Molecular Dynamics (mechanical failure, Coulomb explosions, self sputtering), Particle-In-Cell (PIC) codes (plasma evolution), mesoscale surface thermodynamics (surface evolution), and finite element electrostatic modeling (field enhancements). We believe this model may be more widely applicable and we are trying to constrain the physical mechanisms using data from tokamak edge plasmas.
| Original language | English |
|---|---|
| Title of host publication | Proceedings - 25th Linear Accelerator Conference, LINAC 2010 |
| Pages | 205-207 |
| Number of pages | 3 |
| Publication status | Published - 2011 |
| Externally published | Yes |
| Event | 25th International Linear Accelerator Conference, LINAC 2010 - Tsukuba, Ibaraki, Japan Duration: Sep 12 2010 → Sep 17 2010 |
Other
| Other | 25th International Linear Accelerator Conference, LINAC 2010 |
|---|---|
| Country | Japan |
| City | Tsukuba, Ibaraki |
| Period | 9/12/10 → 9/17/10 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Numerical modeling of arcs in accelerators. / Norem, Jim; Insepov, Zeke; Proslier, Thomas; Mahalingam, Sudhakar; Veitzer, Seth.
Proceedings - 25th Linear Accelerator Conference, LINAC 2010. 2011. p. 205-207.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Numerical modeling of arcs in accelerators
AU - Norem, Jim
AU - Insepov, Zeke
AU - Proslier, Thomas
AU - Mahalingam, Sudhakar
AU - Veitzer, Seth
PY - 2011
Y1 - 2011
N2 - We are developing a model of arcing to explain breakdown phenomena in high-gradient rf systems used for particle accelerators. This model assumes that arcs develop as a result of mechanical failure of the surface due to electric tensile stress, ionization of fragments by field emission, and the development of a small, dense plasma that interacts with the surface primarily through self sputtering and terminates as a unipolar arc capable of producing field emitters with high enhancement factors. We are modeling these mechanisms using Molecular Dynamics (mechanical failure, Coulomb explosions, self sputtering), Particle-In-Cell (PIC) codes (plasma evolution), mesoscale surface thermodynamics (surface evolution), and finite element electrostatic modeling (field enhancements). We believe this model may be more widely applicable and we are trying to constrain the physical mechanisms using data from tokamak edge plasmas.
AB - We are developing a model of arcing to explain breakdown phenomena in high-gradient rf systems used for particle accelerators. This model assumes that arcs develop as a result of mechanical failure of the surface due to electric tensile stress, ionization of fragments by field emission, and the development of a small, dense plasma that interacts with the surface primarily through self sputtering and terminates as a unipolar arc capable of producing field emitters with high enhancement factors. We are modeling these mechanisms using Molecular Dynamics (mechanical failure, Coulomb explosions, self sputtering), Particle-In-Cell (PIC) codes (plasma evolution), mesoscale surface thermodynamics (surface evolution), and finite element electrostatic modeling (field enhancements). We believe this model may be more widely applicable and we are trying to constrain the physical mechanisms using data from tokamak edge plasmas.
UR - http://www.scopus.com/inward/record.url?scp=84888383343&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84888383343&partnerID=8YFLogxK
M3 - Conference contribution
SP - 205
EP - 207
BT - Proceedings - 25th Linear Accelerator Conference, LINAC 2010
ER -