Design and construction of a table top microwave free electron maser for industrial applications

Wright, Colin; Stuart, R.A.; Lucas, James M.; Al-Shamma’a, A.I.; Petichakis, C.

doi:10.1016/j.vacuum.2004.09.008

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…The 'Pierce' type electron gun could have a maximum emission current of 285 mA [26]. Hence, with the acceleration voltage of 3 kV, and the beam current of 142 mA (assuming 50% of the 285 mA current flow across the apertures of the output cavity), the resultant output power will be around 45 Watt.…”

Section: Discussionmentioning

confidence: 99%

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The Experimental Results of a Low Power X-Band Free Electron Maser by Electron Pre-Bunching

Malek¹,

Lucas²,

Huang³

2010

PIER

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Abstract-We have developed a proof-of-concept low power free electron maser that is compact and low cost. The design, set-up and results of a novel (without wiggler) low power X-band rectangular waveguide pre-bunched free electron maser (PFEM) are presented in this paper. Our device operates at 10 GHz, with 10 mWatt seeding input power and employs two rectangular waveguide cavities (one for velocity modulation and the other for energy extraction). The electron beam used in this experiment is produced by Thoria coated Iridium filament which can operate at 3 kV and up to 5 mA beam current. The effect of the aperture on the power leaking out of the waveguide is also analyzed. The TE 10 mode propagation of the EM standing wave is used to pre-bunch the electron beams in the input cavity. The bunched electron beams are in the same phase as the TE 10 mode propagation of the EM wave in the output cavity. This free electron maser could be useful industrially, as it could be used with the commercially available accelerating voltage supplies.

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Section: Discussionmentioning

confidence: 99%

“…This voltage is still considerably lower than previous FEL work at The University of Liverpool operating at 10 GHz. The voltage of 55.7 kV was used in [23], and around 70 kV was used in [26]. At higher frequencies, the use of waveguides to contain the radiation is no more practical.…”

Section: Discussionmentioning

confidence: 99%

The Experimental Results of a Low Power X-Band Free Electron Maser by Electron Pre-Bunching

Malek¹,

Lucas²,

Huang³

2010

PIER

View full text Add to dashboard Cite

show abstract

“…The 'Pierce' type electron gun used by previous Free Electron Laser researcher produced a maximum emission current of 285 mA [27]. Hence, with the acceleration voltage of 3 kV, and the beam current of 142 mA (assuming 50% of the 285 mA current flow across the apertures of the output cavity), the resultant cavity PFEM output power will be significantly increased.…”

Section: Discussionmentioning

confidence: 99%

The Engineering and Construction of a Pre-Bunched Free Electron Maser

Malek

Lucas²,

Huang³

2009

PIER

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Abstract-We are developing prototype free electron maser (FEM) that is compact, tuneable and efficient for potential industrial use. Therefore we define the characteristics for the construction of a novel X-band rectangular waveguide pre-bunched free electron maser (PFEM). Our device operates at 10 GHz and employs two rectangular waveguide cavities (one for velocity modulation and the other for energy extraction). The electron beam used in this experiment is produced by thermionic electron gun which can operate at 3 kV and up to 5 mA. The resonant cavity consists of a thin gap section of height 1.5 mm which reduces the beam energy required for beam wave interaction. The prototype design, engineering and construction process are reported in this paper.

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“…The 'Pierce' type electron gun used by previous FEL researcher at Liverpool produced a maximum emission current of 285 mA [19]. Hence, with the acceleration voltage of 3 kV, and the beam current of 142 mA (assuming 50% of the 285 mA current flow across the apertures of the output cavity), the resultant cavity PFEM output power will be around 45 Watt.…”

Section: Summary and Future Workmentioning

confidence: 99%

Prototype Design of Compact and Tuneable X-Band Pre-Bunched Free Electron Maser

Malek¹,

Lucas²,

Huang³

2008

PIER

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Abstract-At the University of Liverpool, we are developing prototype free electron maser (FEM) that are compact, powerful and efficient for potential industrial applications. The design, set-up and results of a novel X-band rectangular waveguide pre-bunched free electron maser (PFEM) are presented in this paper. Our initial device operates at 10 GHz and employs two rectangular waveguide cavities (one for velocity modulation and the other for energy extraction). The electron beam used in this experiment is produced by thermionic electron gun which operates at 3 kV and up to 50 µA. The nominal beam diameter is 1 mm passing across the X-band cavity resonators. The resonant cavity consists of a thin gap section of height 1.5 mm which reduces the beam energy required for beam wave interaction. The results, progress so far and the scope of work for the next couple of months are reported.

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Design and construction of a table top microwave free electron maser for industrial applications

Cited by 7 publications

References 7 publications

The Experimental Results of a Low Power X-Band Free Electron Maser by Electron Pre-Bunching

The Experimental Results of a Low Power X-Band Free Electron Maser by Electron Pre-Bunching

The Engineering and Construction of a Pre-Bunched Free Electron Maser

Prototype Design of Compact and Tuneable X-Band Pre-Bunched Free Electron Maser

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