Details of Grant 

EPSRC Reference:	GR/S68385/01
Title:	High brightness pseudospark sourced relativistic electron beams and their interactions with EM radiation
Principal Investigator:	Cross, Professor A
Other Investigators:	Ronald, Professor K Phelps, Professor ADR
Researcher Co-Investigators:	Dr H Yin
Project Partners:	CNRS Group Teledyne UK Ltd
Department:	Physics
Organisation:	University of Strathclyde
Scheme:	Standard Research (Pre-FEC)
Starts:	01 February 2004	Ends:	31 January 2007	Value (£):	209,734
EPSRC Research Topic Classifications:	Plasmas - Laser & Fusion
EPSRC Industrial Sector Classifications:	Electronics Energy
Related Grants:
Panel History:	Panel Date Panel Name Outcome 30 Jul 2003 Physics Prioritisation Panel (Science) Deferred
Summary on Grant Application Form
The principle aim is to explore the novel physics of the pseudospark (PS) discharge, to understand how to produce and transport a PS electron beam and hence generate electron pulses with the highest simultaneous current density and brightness of any known type of electron beam source. We will build on our previous achievements in PS electron beam formation (40kV,1.5kA/cm[2], brightness 10[11]-10[12]Am[-2]rad[-2]) and microwave generation to combine experiments with numerical simulations and understand the beam formation and transport dynamics. We will achieve beam transportation from the high pressures of the discharge chamber to the hard vacuum required in many applications. We will use the low emittance (2-10 pi mm mrad) PS electron beam pulses to investigate the Cherenkov and Cyclotron Resonance Maser (CRM) instabilities. PS sourced electron pulses of longer duration (<1 ns to 100ns) will be used to generate coherent high power radiation in high gain Cherenkov maser amplifier and CRM oscillator experiments. We propose to combine the PS with a beam energy spectrometer which will allow us to select high peak current, high quality, fast (-100 ps) high-brightness electron pulses. PS sourced electron pulses which have a pulse duration less than the transit time through the interaction space will be used to study superradiant emission when the pulse structure of the electrons affects their interaction with the radiation. This results in scaling laws which differ from the theory of non-pulsed electron beams, and are generally advantageous for the efficient production of high peak power radiation.
Key Findings
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Organisation Website:	http://www.strath.ac.uk