What question did this study set out to answer?

The aim is to measure the transverse emittance of electron beams produced by a superconducting RF gun.

January 22, 2026Open Access

Transverse emittance measurements of electron beams from the superconducting RF gun for high-current operation at Helmholtz-Zentrum Dresden-Rossendorf

Key Points

The aim is to measure the transverse emittance of electron beams produced by a superconducting RF gun.
Implemented a slit-scan setup in the diagnostics beamline
Characterized the vertical phase space of electron beams
Conducted measurements at a bunch charge of 200 pC and beam energy of 3.5 MeV
Measured transverse emittance at specified conditions
Characterized the performance of the SRF gun for effective user operation
Provided valuable data for future light source applications

Abstract

High-brightness, megahertz-rate electron sources are a crucial component of future light sources, including the Linac Coherent Light Source II High Energy project, or the high-duty-cycle upgrade of the European X-ray Free-Electron Laser. The Helmholtz-Zentrum Dresden-Rossendorf has employed a superconducting radio-frequency (SRF) gun as one of its CW electron sources for user operation at ELBE since 2010. The SRF gun is used to drive the superradiant THz source TELBE, typically at repetition rates of 50 kHz and bunch charges of 200 pC. To determine the operating envelope of the SRF gun injector, a slit-scan setup was installed in the diagnostics beamline after the SRF gun, enabling characterization of the vertical phase space. In this proceeding, we describe the slit-scan setup at the diagnostics beamline of the SRF gun. Measurements of the vertical emittance at 200 pC bunch charge and beam energies of 3.5 MeV will be presented.

Transverse emittance measurements of electron beams from the superconducting RF gun for high-current operation at Helmholtz-Zentrum Dresden-Rossendorf

Key Points

Abstract

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