WG1016
BNL, Upton, Long Island, New York, USA
Stony Brook University, Stony Brook, USA
JLAB, Newport News, Virginia, USA
SBU, Stony Brook, New York, USA
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WG1016 |
Progress at BNL Towards Development of Efficient, Robust Photocathodes for High Average Current Operation | |
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| The photocathode research at BNL is proceeding along two parallel paths, characterizing the cathodes as they are being fabricated and testing them in a variety of guns. Using modern surface science techniques such as X-Ray Reflection (XRR), X-Ray Diffraction (XRD) and X-Ray photoemission spectroscopy (XPS), we have investigated Sb and K-Cs-Sb layers as a function of the deposition technique, substrate material and deposition recipes. The talk will cover the latest results of these investigations. Cathode insertion section for the 112 MHz SRF gun is being designed for testing multialkali and diamond secondary emission cathodes. The status of the designs will also be presented. In addition, the multialkali cathode, fabricated at BNL and transported to JLab, has been tested for high current operation in a DC injector at JLab. The performance of this cathode when irradiated 440 nm and 532 nm radiation, under different bias voltages and average currents will be presented. | ||
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Slides WG1016 [4.189 MB] | |