Coating in ultra-high vacuum cathodic-arc and processing of Pb films on Nb substrate as steps in preparation of Nb-Pb photocathodes for radio-frequency, superconducting e− guns

Lorkiewicz, J.; Nietubyć, R.; Diduszko, R.; Sekutowicz, J.; Kosińska, A.; Mirowski, R.; Kuk, M.; Trembicki, Andrzej

doi:10.1016/j.vacuum.2020.109524

Cited by 4 publications

(1 citation statement)

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“…Lead (Pb) coated on Nb substrate is chosen as one possibility because of its relatively high critical temperature. The treatment and photoemission of this material have been studied by the group of J. Smedley and T. Rao at BNL [17], later by R. Barday at HZB [18], and recently by J. Lorkiewicz at NCBJ [19]. After laser cleaning the QE of lead can reach 10 -4 level at 258 nm.…”

Section: Desy Srf Gun (Elliptical Cavity With Sc Cathode)mentioning

confidence: 99%

Superconducting radio frequency photoinjectors for CW-XFEL

2023

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A dependable and consistent electron source is a crucial requirement for the achievement of high-power free electron lasers (FELs). Over the past two decades, it has been demonstrated that photoinjectors based on SRF technology (SRF guns) are suitable for continuous wave (CW) beam generation. SRF guns possess both the high accelerating field gradients of normal conducting RF photoinjectors and the low power dissipation thanks to mature SRF cavity technology, and therefore have the potential to provide the high-brightness, high-current beams required for CW-XFELs. After the demonstration of the first SRF gun in Dresden-Rossendorf, several SRF gun programs based on different approaches have achieved promising progress and even succeeded in routine operation. SRF guns are expected to play an important role in XFEL facilities in the near future. In this paper, we give an overview of design concepts, important parameters and development status of the worldwide SRF gun projects.

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Section: Desy Srf Gun (Elliptical Cavity With Sc Cathode)mentioning

confidence: 99%