SHeet Electron beam vacuum eLectronic DevIces for the Generation of High power THz radiation

Lead Research Organisation: Queen Mary University of London
Department Name: Sch of Electronic Eng & Computer Science

Abstract

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
 
Description Models have been developed to indicate a pseudospark discharge can generate a sheet-electron beam to drive a planar Extended Interaction Klystron to produce high power (kW) sub-millimetre (395GHz) wave radiation without the need to use an applied magnetic field. An sub-millimetre wave (395GHz) Extended interaction Oscillator has been designed an is presently under construction. A sheet electron beam produced by a PS-discharge has been measured. Two further sheet beam pesudospark devices have been modelled a planar 365GHz travelling wave and backward wave oscillator device
Exploitation Route In vacuum electronic devices, high quality intense electron beams are essential as the frequency increases, thus the pseudospark (PS) discharge has attracted a lot of attention recently as a promising source of high quality, high intensity electron beam pulses with the beam current density up to 108 A m-2 and brightness up to 1012 A m-2 rad-2. This is because a PS-sourced electron beam has the ability to self-focus due to the unique discharge structure and the formation of an ion channel generated by the beam front. This beam has a higher combined current density and brightness compared to electron beams formed from any other known type of electron source and makes it an excellent electron beam source for desirable compact millimetre wave devices. PS-sourced electron beams have been applied in many fields such as material processing, free electron lasers, x-ray sources, extreme-ultraviolet production, and microwave devices.
Sectors Aerospace, Defence and Marine,Agriculture, Food and Drink,Digital/Communication/Information Technologies (including Software),Electronics,Energy,Healthcare
 
Description The impact of this work is recorded against grant ref EP/S00968X/1.
Sector Agriculture, Food and Drink,Digital/Communication/Information Technologies (including Software),Environment,Manufacturing, including Industrial Biotechology
Impact Types Societal,Economic
 
Description Adrian Cross 
Organisation University of Strathclyde
Country United Kingdom 
Sector Academic/University 
PI Contribution My group carried out some modelling of the pseudospark discharge using the Particle In Cell code MAGIC
Collaborator Contribution Prof Cross' group conducted an extensive experimental work
Impact 6 joint papers
Start Year 2010
 
Description National Vacuum Electronics Conference 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Postgraduate students
Results and Impact The National Vacuum Electronics Conference (NVEC) is a UK annual conference focusing on early career researchers and staff members (PhD student / PDRA level). It is dedicated to Vacuum Electronics, RF and Accelerator Science, Engineering and Innovation. NVEC 2020 was held on Monday, 9th November 2020. Due to the COVID-19 pandemic, NVEC 2020 was held online with MS Teams. Over 30 participants, most of them being PhD students, attended 2020 version. The talks on the funded project were presented by the team members, leading to discussion and questions afterwards.
Year(s) Of Engagement Activity 2020
URL https://www.qmul.ac.uk/nvec2020/