ScholarLens Back to search
2005•Unpublished venueRequires access

A TWO-FREQUENCY RF CAVITY FOR THE PSI LOW EMITTANCE GUN

R.J. Bakker, K. Li, M. Pedrozzi

Open publisher page 3 citations

Abstract

In the Low Emittance Gun (LEG) under development at PSI, an extremely bright electron beam is produced from field emitters and then rapidly accelerated in a diode configuration up to 1 MeV with gradients of the order of 250 MV/m. The electronic emission from such a cold cathode is expected to deliver a normalized intrinsic emittance below 0.05 mm·mrad well suited for X-ray FEL or linear collider applications. The diode is followed by an L-band RF gun-like cavity to further accelerate the beam. A third harmonic field is superimposed to the fundamental 1.5 GHz π-mode field to minimize the RF emittance growth. We report here on the design of such a two-frequency RF cavity with some details on the RF coupling. Beam dynamics studies, performed with PARMELA, are presented and compared with the results obtained for an RF cavity excited with the fundamental frequency only.

About this research paper

What this paper is about

In the Low Emittance Gun (LEG) under development at PSI, an extremely bright electron beam is produced from field emitters and then rapidly accelerated in a diode configuration up to 1 MeV with gradients of the order of 250 MV/m. The electronic emission from such a cold cathode is expected to deliver a normalized intrinsic emittance below 0.05 mm·mrad well suited for X-ray FEL or linear collider applications. The diode is followed by an L-band RF gun-like cavity to further accelerate the beam. A third harmonic field is superimposed to the fundamental 1.5 GHz π-mode field to minimize the RF emittance growth. We report here on the design of such a two-frequency RF cavity with some details on the RF coupling. Beam dynamics studies, performed with PARMELA, are presented and compared with the results obtained for an RF cavity excited with the fundamental frequency only.

Why it matters

OpenAlex reports 3 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

In the Low Emittance Gun (LEG) under development at PSI, an extremely bright electron beam is produced from field emitters and then rapidly accelerated in a diode configuration up to 1 MeV with gradients of the order of 250 MV/m. The electronic emission from such a cold cathode is expected to deliver a normalized intrinsic emittance below 0.05 mm·mrad well suited for X-ray FEL or linear collider applications. The diode is followed by an L-band RF gun-like cavity to further accelerate the beam. A third harmonic field is superimposed to the fundamental 1.5 GHz π-mode field to minimize the RF emittance growth. We report here on the design of such a two-frequency RF cavity with some details on the RF coupling. Beam dynamics studies, performed with PARMELA, are presented and compared with the results obtained for an RF cavity excited with the fundamental frequency only.

Key concepts: Thermal emittance, Electron gun, Radio frequency, Physics, Beam (structure), Optics, Diode, RF power amplifier

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
A TWO-FREQUENCY RF CAVITY FOR THE PSI LOW EMITTANCE GUN — Research Paper | ScholarLens