Physics of Novel Radiation Modalities Particles and Isotopes
DESIGN AND STUDY OF NOVEL SUB-THZ RADIATION AND STUDY OF NOVEL SUB-THZ RADIATION ... Millimeter...
Transcript of DESIGN AND STUDY OF NOVEL SUB-THZ RADIATION AND STUDY OF NOVEL SUB-THZ RADIATION ... Millimeter...
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DESIGN AND STUDY OF NOVEL SUB-THZ RADIATION
SOURCE “NANOVIRCATOR” IN CST PARTICLE STUDIO
Saratov State University, Saratov State Technical University, Saratov, Russia
WWW: http://nonlin.sgu.ru
*E-mail: [email protected]
Nikita S. Frolov, Semen A. Kurkin, Alexey A. Koronovskii, Artem A. Badarin, Alexander E. Hramov
10th European User Conference, 28-29 April 2015
Carrying forward the THz range
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John H. Booske. Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave radiation. Physics of Plasmas, 15, 2008, 055502.
Compact THz radiation source – “nanoklystron”
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• Peter H. Siegel, et al. Nanoklystron: a monolithic tube approach to THz Power Generation,
12 International Symposium on Space Terahertz Technology, 2001, P. 82-90.
• John R. Fletcher. Design consideration for submillimeter-wave reflex klystrons, IEEE Transactions on microwave theory and techniques, Vol. 52, N. 10, 2004, P. 2344-2358.
• Balucani M., et al. Nano-Klystron: new design and technology for THz Source, Millimeter waves and THz technology workshop, 2013, P. 1-2
f ~ 0.6 – 1.2 THz
j ~ 100 A/cm2
Ec ~ 2.5-5 V/μm
Vacuum ~ 10-8 Torr
System under study – “nanovircator”
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a b
(a) “Nanovircator” perspective view; (b) «Nanovircator» cross-section: 1 – electron gun, 2 – drift tube, 3 – cathode, 4 – DC voltage source, 5 – anode grid, 6 – output coaxial waveguide, 7 – collector, 8 – voltage monitor, 9 – Rogowski coil (current monitor)
Overcritical current. Electron beam emission
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R
AIcr 111003.172/33/23
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0.1 THz, j ~ 2 kA/cm2
Carbon nanotube cathode:
Int ~ 100 nA ρnt ~ 1010 nt/cm2 jnt ~ 1-10 kA/cm2
C. Papadopoulos, J. M. Xu, et al. Nanotube carbon cathode. Applied Physics Letters, 75, 1999. P. 386
Sub-THz Generation
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Sub-THz Generation
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Conclusions
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The obtained results demonstrate that the proposed virtual cathode oscillator “nanovircator” may be considered as the promising compact sub-THz radiation source that has a simple construction and operates in the absence of the external magnetic field.
Plans and perspectives
• Critical current lowering; • Full-scale mathematical optimization of existing “nanovircator” scheme in CST PS (geometry and beam optimization); • Detailed emission simulation (field emission);
• Analysis of external signal input posibility; • Simulation of coupled “nanovircator” cluster*.
*Moskalenko O.I., Phrolov N.S., Koronovskii A.A., Hramov A.E. Synchronization in the network of Chaotic microwave oscillators. Eur. Phys. J. Special Topics. 222, (2013) 2571-2582