| Paper |
Title |
Page |
| MOPCH170 |
Experimental and Theoretical Analysis of the Tesla-like SRF Cavity Flanges
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463 |
| |
- L. Monaco, P. Michelato, C. Pagani, N. Panzeri
INFN/LASA, Segrate (MI)
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In view of the future large SC accelerator, an improvement of the reliability and a cost reduction of the SRF cavities cold flanges is required. In this paper, a critical analysis of the TESLA-like cold connection flanges at room and at cryogenic temperature is presented. This analysis is based on experimental characterization of the mechanical properties of the joint and of the leak rates during the sealing process. A FEM model, that agrees with the experimental data, is also presented. This model is being used for the optimization of the present SRF flanges and the development of new cold connections.
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| WEPLS051 |
Dark Current Investigation of TTF and PITZ RF Guns
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2493 |
| |
- L. Monaco, P. Michelato, C. Pagani, P. Pierini, D. Sertore
INFN/LASA, Segrate (MI)
- J.H. Han, S. Schreiber
DESY, Hamburg
- M. Krasilnikov, F. Stephan
DESY Zeuthen, Zeuthen
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The dark current is one of the limiting factor in the operation of RF guns at high gradient. The continuous request of higher brilliance sources and further emittance minimization, leads to apply higher gradients in the RF gun cavity, with the consequence of a significant dark current production. In this context we set up a collaborative effort to identify the dark current sources in the gun, in order to discriminate between the gun and cathode contribution. A critical analysis and organization of dark current measurements, taken during the operation of TTF and PITZ guns, with several cathodes operated at different accelerating fields and solenoids focusing, is presented. Potential areas of improvement are also discussed, together with a possible associated program.
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| WEPLS052 |
High QE Photocathode at FLASH
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2496 |
| |
- D. Sertore, P. Michelato, L. Monaco, C. Pagani
INFN/LASA, Segrate (MI)
- J.H. Han, S. Schreiber
DESY, Hamburg
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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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