| Title |
Design for HyRES Cathode Nanotip Electron Source |
| Authors |
- R.M. Hessami, A.F. Amhaz, P. Musumeci
UCLA, Los Angeles, USA
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| Abstract |
A new ultrafast electron diffraction (UED) instrument is being developed by UCLA-Colorado University collaboration for the STROBE NSF Center with the goal of using electron and EUV photon beams to reveal the structural dynamics of materials in non-equilibrium states at fundamental atomic and temporal scales. This paper describes the design of the electron beamline of this instrument. In order to minimize the initial emittance, a nanotip photocathode, 25 nm in radius, will be used. This requires a redesign of the cathode and anode components of the electron gun to allow for the tip to be properly aligned. Solenoidal lenses are used to focus the beam transversely to a sub-micron spot at the sample and a radiofrequency (RF) cavity, driven by a continuous wave S-band RF source, longitudinally compresses the beam to below 100 fs, required for atomic resolution.
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| Paper |
download MOPLH04.PDF [0.520 MB / 4 pages] |
| Export |
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| Conference |
NAPAC2019 |
| Series |
North American Particle Accelerator Conference (4th) |
| Location |
Lansing, MI, USA |
| Date |
01-06 September 2019 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Yoshishige Yamazaki (MSU, East-Lansing, MI, USA); Tor Raubenheimer (SLAC, Stanford, CA, USA); Amy McCausey (FRIB, East-Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-223-3 |
| Online ISSN |
2673-7000 |
| Received |
27 August 2019 |
| Accepted |
05 September 2019 |
| Issue Date |
08 October 2019 |
| DOI |
doi:10.18429/JACoW-NAPAC2019-MOPLH04 |
| Pages |
177-180 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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