The RF gun-based photoinjector of the VUV-FEL/TTF at DESY continues to use high quantum efficiency (QE) photocathodes produced at LASA, Milano. To study the photocathode behavior during beam operation, an online QE monitoring tool has been installed. In this paper, we present the hardware and software setup for the online QE measurement and the results so far obtained. The measured QEs are usually higher than at TTF phase 1. We compare the QE values taken in the RF gun with data measured just after production with a continuous UV light source.
High QE photocathode at FLASH / D. Sertore, P. Michelato, L. Monaco, C. Pagani, J.H. Han, S. Schreiber - In: EPAC 2006 : proceedings, Edinburgh, Scotland, 26-30 June 2006[s.l] : European Physical Society Accelerator Group, 2006. - pp. 2496-2498 (( Intervento presentato al 10. convegno European particle accelerator conference tenutosi a Edinburgh, Scotland nel 2006.
High QE photocathode at FLASH
C. Pagani;
2006
Abstract
The RF gun-based photoinjector of the VUV-FEL/TTF at DESY continues to use high quantum efficiency (QE) photocathodes produced at LASA, Milano. To study the photocathode behavior during beam operation, an online QE monitoring tool has been installed. In this paper, we present the hardware and software setup for the online QE measurement and the results so far obtained. The measured QEs are usually higher than at TTF phase 1. We compare the QE values taken in the RF gun with data measured just after production with a continuous UV light source.
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