Keyword: gun
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TUT2H2 Injector Linac Upgrade and New RF Gun Development for SuperKEKB ion, cavity, emittance, laser 74
 
  • T. Natsui, D. Satoh, M. Yoshida, R. Zhang, X. Zhou
    KEK, Ibaraki, Japan
  
  The SuperKEKB commissioning has finally started. The final goal of luminosity is 40 times higher than KEKB. The injector upgrade is required to obtain the low emittance and high charge beam corresponding to the short beam life and small injection acceptance of the SuperKEKB ring. In the injector linac, several new instruments have been installed. Flux Concentrator (FC) was developed for high charge positron beam production. The target bunch charge of positron beam is 4 nC. The new damping ring will be used for positron beam to reduce beam emittance to 10 mm-mrad. However, electron beam must be reached to 20 mm-mrad normalized emittance at 5 nC beam charge without damping ring. Thermionic gun was used for KEKB injector and it was able to generate enough beam charge. However, its emittance is too large. Therefor we developed photo cathode S-band RF gun. This new RF gun has unique accelerating cavity which called quasi-travelling wave side coupled cavity. Laser system for this photo cathode has been also developed. The laser system is constructed with Yb:YAG thin disk for high power and pulse shaping. I will illustrate the RF gun, laser system and several new injector linac systems.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT2H2  
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TUT2H6 Electron Sources and Polarization ion, cathode, electron, SRF 94
 
  • R. Xiang, J. Teichert
    HZDR, Dresden, Germany
  
  Funding: Supported by the European Community under the FP7 programme (EuCARD-2 and LA3NET) and by the German Federal Ministry of Education and Research (BMBF) grant 05K12CR1.
In this presentation the present electron sources and the relevant issues will be discussed. For the electron positron colliders and accelerator based light sources, the electron gun and injector design, are arguably the most critical part. There are a variety of electron source designs: DC guns, normal-conducting RF guns, superconducting RF gun and hybrid guns. All variants have their own ad-vantages and difficulties. We will overview the typical sources around the world, and compare their advantages and main challenges. The polarization production will also be discussed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT2H6  
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THS1H6 Summary of Injector and Beam Injection ion, injection, collider, booster 206
 
  • J.T. Seeman
    SLAC, Menlo Park, California, USA
  
  Summary of Injector and Beam Injection: This summary covers the Injection and Sources Session of the e+e- Factories Workshop 2016, which had six presentations. Here we discuss the goals for top-up injection for a collider and their sources and then covers the highlights, discussion topics, and future plans for each presentation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-THS1H6  
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