# Multipactor discharge in a dielectric-loaded accelerating structure

## Abstract

This paper presents a Monte-Carlo model to explain the multipactor discharge and its high-power absorption in a dielectric-loaded accelerating (DLA) structure reported recently [J. G. Power et al., Phys. Rev. Lett. 92, 164801 (2004)]. Susceptibility diagrams are constructed. Dynamic calculations for beam loading and its power absorption by the multipactor discharge are performed. It is found that the fraction of power absorbed by multipactor discharge at saturation is much larger than the case of a simple rf window, and it is sensitive to the incident power, which confirms the prior experimental results. This enhanced power absorption is due to the fact that the length of a DLA structure is much larger than the radius of the structure. A resonant condition of a maximum growth region has also been determined numerically and analytically. The difference between the resonant condition and saturation (due to beam loading) is clarified.

- Authors:

- School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore (Singapore)
- (Singapore)

- Publication Date:

- OSTI Identifier:
- 20960120

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 1; Other Information: DOI: 10.1063/1.2435709; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABSORPTION; BEAM-PLASMA SYSTEMS; BEAMS; DIAGRAMS; DIELECTRIC MATERIALS; HIGH-FREQUENCY DISCHARGES; MONTE CARLO METHOD

### Citation Formats

```
Wu, L., Ang, L. K., and School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore and Institute of High Performance Computing, 117528 Singapore.
```*Multipactor discharge in a dielectric-loaded accelerating structure*. United States: N. p., 2007.
Web. doi:10.1063/1.2435709.

```
Wu, L., Ang, L. K., & School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore and Institute of High Performance Computing, 117528 Singapore.
```*Multipactor discharge in a dielectric-loaded accelerating structure*. United States. doi:10.1063/1.2435709.

```
Wu, L., Ang, L. K., and School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore and Institute of High Performance Computing, 117528 Singapore. Mon .
"Multipactor discharge in a dielectric-loaded accelerating structure". United States.
doi:10.1063/1.2435709.
```

```
@article{osti_20960120,
```

title = {Multipactor discharge in a dielectric-loaded accelerating structure},

author = {Wu, L. and Ang, L. K. and School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore and Institute of High Performance Computing, 117528 Singapore},

abstractNote = {This paper presents a Monte-Carlo model to explain the multipactor discharge and its high-power absorption in a dielectric-loaded accelerating (DLA) structure reported recently [J. G. Power et al., Phys. Rev. Lett. 92, 164801 (2004)]. Susceptibility diagrams are constructed. Dynamic calculations for beam loading and its power absorption by the multipactor discharge are performed. It is found that the fraction of power absorbed by multipactor discharge at saturation is much larger than the case of a simple rf window, and it is sensitive to the incident power, which confirms the prior experimental results. This enhanced power absorption is due to the fact that the length of a DLA structure is much larger than the radius of the structure. A resonant condition of a maximum growth region has also been determined numerically and analytically. The difference between the resonant condition and saturation (due to beam loading) is clarified.},

doi = {10.1063/1.2435709},

journal = {Physics of Plasmas},

number = 1,

volume = 14,

place = {United States},

year = {Mon Jan 15 00:00:00 EST 2007},

month = {Mon Jan 15 00:00:00 EST 2007}

}