A 2.5 MV subnanosecond pulser with laser triggered spark gap for the the generation of high brightness electron bunches

D.A. Vyuga, A. Volkov, P. Tomashevich, G. Baranov, M.J. van der Wiel, G.J.H. Brussaard

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)


High-intensity, low-emittance, short electron bunches are needed to attain Self-Amplified Spontaneous Emission (SASE) in X-ray Free Electron Lasers (X-FEL) and for injection in future Laser-Wakefield accelerators (LWFA). At such a high density, conventional techniques using magnetic compression of long bunches will suffer from collective effects such as coherent synchrotron radiation, limiting the brightness achievable. On the other hand, when creating very short electron bunches using a high intensity femtosecond laser the internal space charge forces will rapidly decrease the brightness of the bunch. However, these space charge forces become negligibly small at relativistic energies due to the Lorentz force and contraction. Simulations have shown that acceleration to relativistic energies in a field of 1 GV/m would preserve enough of the phase-space density to meet the requirements for SASE and bunch length sufficiently small for injection into a LWFA. Conventional (RF) accelerators have maximum fields of approximately 100 MV/m and are usually operated in the 10-30 MV/m range. A novel approach was proposed by Srinivasan-Rao et al. in which a short high-voltage pulse is applied to a simple diode configuration to generate a GV/m electric field.

Original languageEnglish
Title of host publicationDigest of Technical Papers. PPC-2003. 14th IEEE International Pulsed Power Conference, 15-18 June 2003
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages4
ISBN (Print)0-7803-7915-2
Publication statusPublished - 1 Dec 2003
Event14th IEEE International Pulsed Power Conference - Dallas, TX, United States
Duration: 15 Jun 200318 Jun 2003


Conference14th IEEE International Pulsed Power Conference
Country/TerritoryUnited States
CityDallas, TX


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