| Paper |
Title |
Page |
| TUPKF080 |
Photoemission Properties of Lead
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1126 |
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- J. Smedley, T. Srinivasan-Rao, J. Warren
BNL, Upton, Long Island, New York
- R.S. Lefferts, A.R. Lipski
SBUNSL, Stony Brook, New York
- J. Sekutowicz
Jefferson Lab, Newport News, Virginia
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There is significant interest in the possibility of building a super-conducting injector for high average current accelerator applications. One candidate for such a cavity design is superconducting lead. Such an injector would be made considerably simpler if it could be designed to use lead as the photocathode, eliminating the need for Cesiated materials in the injector. In this paper we present a study of the photoemission properties of lead at several UV wavelengths, including a study of the damage threshold of electroplated lead under laser cleaning. A quantum efficiency in excess of 0.1% has been achieved for a laser cleaned, electroplated lead sample with a laser wavelength of 193 nm.
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| MOPLT156 |
High Brightness Electron Guns for Next-Generation Light Sources and Accelerators
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899 |
| |
- H. Bluem, M.D. Cole, J. Rathke, T. Schultheiss, A.M.M. Todd
AES, Princeton, New Jersey
- I. Ben-Zvi, T. Srinivasan-Rao
BNL, Upton, Long Island, New York
- P. Colestock, D.C. Nguyen, R.L. Wood, L. Young
LANL, Los Alamos, New Mexico
- D. Janssen
FZR, Dresden
- J. Lewellen
ANL, Argonne, Illinois
- G. Neil, H.L. Phillips, J.P. Preble
Jefferson Lab, Newport News, Virginia
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Advanced Energy Systems continues to develop advanced electron gun and injector concepts. Several of these projects have been previously described, but the progress and status of each will be updated. The project closest to completion is an all superconducting RF (SRF) gun, being developed in collaboration with the Brookhaven National Laboratory, that uses the niobium of the cavity wall itself as the photocathode material. This gun has been fabricated and will shortly be tested with beam. The cavity string for a closely-coupled DC gun and SRF cavity injector that is expected to provide beam quality sufficient for proposed ERL light sources and FELs will be assembled at the Jefferson Laboratory later this year. We are also collaboration with Los Alamos on a prototype CW normal-conducting RF gun with similar performance, that will undergo thermal testing in late 2004. Another CW SRF gun project that uses a high quantum efficiency photocathode, similar to the FZ-Rossendorf approach, has just begun. Finally, we will present the RF design and cold test results for a fully axisymmetric, ultra-high-brightness x-band RF gun.
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