Abstract
A Two-dimensional (2D) Periodic Surface Lattice (PSL) can produce distributed feedback in high power microwave sources driven by an oversized electron beam of annular geometry. Such 2D periodic structures can be formed in cylindrical waveguide with a grating machined on the walls, where the diameter of the waveguide is larger than the wavelength λ (D >> λ). In this case localised surface fields can be excited around the perturbations if the structure is radiated by an external source (for example an electron beam). Experiments were conducted using a velvet cathode electron gun with the electron accelerating voltage produced by a cable Blumlein generator. 'Additive Manufacturing' or '3D printing' was used to construct a silver 2D PSL quickly, efficiently and relatively inexpensively. The electron beam formed within an 18 mm bore 1.8 T solenoid was transported through the 7.2 mm inner diameter silver 2D PSL beam-wave interaction region. An 80 kV, 100 A electron beam with an outer diameter of 4 mm and inner diameter of 2mm which was approximately 1.8 mm away from the inner surface of the 2D PSL corrugation was measured. Millimetre wave radiation at a frequency of 80GHz at an output power of 130 ± 30 kW corresponding to an operating efficiency of 1.7 % was measured.
| Original language | English |
|---|---|
| Title of host publication | 2017 IEEE 21st International Conference on Pulsed Power |
| Place of Publication | Piscataway, NJ |
| Publisher | IEEE |
| Number of pages | 4 |
| ISBN (Print) | 9781509057481 |
| DOIs | |
| Publication status | Published - 15 Feb 2018 |
| Event | 21st IEEE International Conference on Pulsed Power - Brighton, United Kingdom Duration: 18 Jun 2017 → 22 Jun 2017 |
Conference
| Conference | 21st IEEE International Conference on Pulsed Power |
|---|---|
| Abbreviated title | PPC 2017 |
| Country | United Kingdom |
| City | Brighton |
| Period | 18/06/17 → 22/06/17 |
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Keywords
- Periodic Surface Lattice (PSL)
- distributed feedback
- 3D printing
- electron beam
Cite this
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Periodic structures manufactured by 3D printing for electron beam excitation of high power microwave sources. / Phipps, A. R.; Maclachlan, A. J.; Zhang, L.; Robertson, C. R.; Konoplev, I. V.; Ronald, K.; Phelps, A. D. R.; Cross, A. W.
2017 IEEE 21st International Conference on Pulsed Power. Piscataway, NJ : IEEE, 2018. 8291307.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Periodic structures manufactured by 3D printing for electron beam excitation of high power microwave sources
AU - Phipps, A. R.
AU - Maclachlan, A. J.
AU - Zhang, L.
AU - Robertson, C. R.
AU - Konoplev, I. V.
AU - Ronald, K.
AU - Phelps, A. D. R.
AU - Cross, A. W.
N1 - © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
PY - 2018/2/15
Y1 - 2018/2/15
N2 - A Two-dimensional (2D) Periodic Surface Lattice (PSL) can produce distributed feedback in high power microwave sources driven by an oversized electron beam of annular geometry. Such 2D periodic structures can be formed in cylindrical waveguide with a grating machined on the walls, where the diameter of the waveguide is larger than the wavelength λ (D >> λ). In this case localised surface fields can be excited around the perturbations if the structure is radiated by an external source (for example an electron beam). Experiments were conducted using a velvet cathode electron gun with the electron accelerating voltage produced by a cable Blumlein generator. 'Additive Manufacturing' or '3D printing' was used to construct a silver 2D PSL quickly, efficiently and relatively inexpensively. The electron beam formed within an 18 mm bore 1.8 T solenoid was transported through the 7.2 mm inner diameter silver 2D PSL beam-wave interaction region. An 80 kV, 100 A electron beam with an outer diameter of 4 mm and inner diameter of 2mm which was approximately 1.8 mm away from the inner surface of the 2D PSL corrugation was measured. Millimetre wave radiation at a frequency of 80GHz at an output power of 130 ± 30 kW corresponding to an operating efficiency of 1.7 % was measured.
AB - A Two-dimensional (2D) Periodic Surface Lattice (PSL) can produce distributed feedback in high power microwave sources driven by an oversized electron beam of annular geometry. Such 2D periodic structures can be formed in cylindrical waveguide with a grating machined on the walls, where the diameter of the waveguide is larger than the wavelength λ (D >> λ). In this case localised surface fields can be excited around the perturbations if the structure is radiated by an external source (for example an electron beam). Experiments were conducted using a velvet cathode electron gun with the electron accelerating voltage produced by a cable Blumlein generator. 'Additive Manufacturing' or '3D printing' was used to construct a silver 2D PSL quickly, efficiently and relatively inexpensively. The electron beam formed within an 18 mm bore 1.8 T solenoid was transported through the 7.2 mm inner diameter silver 2D PSL beam-wave interaction region. An 80 kV, 100 A electron beam with an outer diameter of 4 mm and inner diameter of 2mm which was approximately 1.8 mm away from the inner surface of the 2D PSL corrugation was measured. Millimetre wave radiation at a frequency of 80GHz at an output power of 130 ± 30 kW corresponding to an operating efficiency of 1.7 % was measured.
KW - Periodic Surface Lattice (PSL)
KW - distributed feedback
KW - 3D printing
KW - electron beam
UR - http://www.scopus.com/inward/record.url?scp=85054247845&partnerID=8YFLogxK
UR - https://ora.ox.ac.uk/objects/uuid:39c1889d-8ce7-49d0-a1b0-8eac3f76db3c
U2 - 10.1109/PPC.2017.8291307
DO - 10.1109/PPC.2017.8291307
M3 - Conference contribution book
AN - SCOPUS:85054247845
SN - 9781509057481
BT - 2017 IEEE 21st International Conference on Pulsed Power
PB - IEEE
CY - Piscataway, NJ
ER -