The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
| Title | Development of a Field-Emission Type S-band RF-Gun System for High Brightness Electron Source Applications | |||||
| Authors |
|
|||||
| Abstract | Electron beams emitted from a cold cathode are thermally stable and mono-energetic with a small phase-space volume*. We have been developing a field-emission type RF-gun system for high brightness electron source applications, including electron scattering/diffraction and tunable coherent X-ray/THz generation. The system consists of a single-gap gun-cavity and an S-band klystron/modulator capable of powering the gun with up to 5.5 MW peak (PRR = 1 Hz, duration = 2.5 μs). The designed gun built with the symmetrised side-couplers has surface field on the cathode ranging 50 – 100 MV/m with 1.3 – 1.7 MW klystron-power and 1.2 field ratio (HFSS). ASTRA simulations also indicate that the gun produces the beam with transverse emittances of less than 1 mm-mrad with 10 – 20 pC bunch charge at 500 keV beam energy. Under the gun operating condition, particle tracking/PIC simulations (CST) show that a single-tip CNT field-emitter** produces short pulsed bunches (~ 1/10 RF-cycle) with small emittance ( 0.01 mm-mrad) and high peak current density ( 10,000 kA/cm²). After the gun is fully installed and commissioned, a CNT-tip cathode will be tested with RF-field emission. | |||||
| Footnotes & References | * N. De Jonge, J.-M. Bonard, Phil. Trans. R. Soc. Lond. A 362, 2239 (2004) ** G. S. Bocharov, and A. V. Eletskii, Nanomaterials 3, 393 (2013) |
|||||
| Paper | download TUPMA010.PDF [1.237 MB / 4 pages] | |||||
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |||||
| Conference | IPAC2015, Richmond, VA, USA | |||||
| Series | International Particle Accelerator Conference (6th) | |||||
| Proceedings | Link to full IPAC2015 Proccedings | |||||
| Session | Tuesday Posters (Madison) | |||||
| Date | 05-May-15 16:00–18:00 | |||||
| Main Classification | 2: Photon Sources and Electron Accelerators | |||||
| Sub Classification | T02 - Electron Sources | |||||
| Keywords | cathode, gun, electron, emittance, vacuum | |||||
| Publisher | JACoW, Geneva, Switzerland | |||||
| Editors | Stuart Henderson (ANL, Argonne, IL, USA); Evelyn Akers (Jlab, Newport News, VA, USA); Todd Satogata (JLab, Newport News, VA, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) | |||||
| ISBN | 978-3-95450-168-7 | |||||
| Published | June 2015 | |||||
| Copyright |
|
