QE Tests with Nb-Pb SRF Photoinjector and Arc Deposited Cathodes

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In this contribution, we report Quantum Efficiency (QE) test results with a hybrid lead/niobium superconducting RF (SRF) photoinjector at 2K and new Pb arc deposited cathodes at 300K. The ultimate goal of our effort is to build a Nb injector with the superconducting cathode made of lead, which, as reported in the past, demonstrated superior QE compared to other metallic superconducting elements. At first, we present the test results obtained with a 1.6-cell high purity Nb cavity with the emitting lead spot in the center of the back plate. The QE test results at room temperature and the SEM surface ... continued below

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J.K. Sekutowicz, P. Kneisel, R. Nietubyc, T. Rao, J. Smedley May 1, 2010.

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In this contribution, we report Quantum Efficiency (QE) test results with a hybrid lead/niobium superconducting RF (SRF) photoinjector at 2K and new Pb arc deposited cathodes at 300K. The ultimate goal of our effort is to build a Nb injector with the superconducting cathode made of lead, which, as reported in the past, demonstrated superior QE compared to other metallic superconducting elements. At first, we present the test results obtained with a 1.6-cell high purity Nb cavity with the emitting lead spot in the center of the back plate. The QE test results at room temperature and the SEM surface analysis of eight Pb cathodes, deposited recently under various conditions, are discussed in the second part of this contribution.

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  • IPAC'10, 23-28 May 2010, Kyoto, Japan

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  • Report No.: JLAB-ACC-11-1380
  • Report No.: DOE/OR/23177-1600
  • Grant Number: AC05-06OR23177
  • Office of Scientific & Technical Information Report Number: 1020719
  • Archival Resource Key: ark:/67531/metadc836592

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  • May 1, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 4:16 p.m.

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J.K. Sekutowicz, P. Kneisel, R. Nietubyc, T. Rao, J. Smedley. QE Tests with Nb-Pb SRF Photoinjector and Arc Deposited Cathodes, article, May 1, 2010; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc836592/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.