Powerful electromagnetic millimeter-wave oscillations produced by stimulated scattering of microwave radiation by relativistic electron beams

Денисов, Г. Г.; Smorgonsky, A. V.; Gubanov, V. P.; Korovin, S. D.; Ростов, В. В.; Yalandin, M. I.

doi:10.1007/bf01013365

Cited by 24 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, constant beam parameters within the pulse plateau are needed for mode selection, especially in oversized slow wave structures, where one mode should dominate over competitors for as long as possible [15,16]. The advantages of drivers with distributed PFLs were proved, even by the first experiments on millimeter-wavelength relativistic oscillators [17,18] and, later, on Ka, X, and S-band repetitively pulsed backward wave oscillators [5,[12][13][14][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Drivers Based on Forming Lines with Extended Quasi-Rectangular Pulses for High-Power Microwave Oscillators

et al. 2022

View full text Add to dashboard Cite

The paper considers such modifications of an ordinary pulse-forming line (PFL) as double-width and triple-width forming lines (DWFL, TWFL) built around the PFL by nesting one and two additional uncharged lines, respectively, into its free volume inside the inner conductor of the PFL. The theoretical analysis is supported by simulation and experimental data, showing that the TWFL provides a 3-fold increase in the voltage pulse width and that it can be further increased by an arbitrary integer factor k. The results of the numerical simulations also show the electric field behavior and other features, including the edge effect in the TWFL. The proposed method opens up new opportunities for designing compact high-power microwace (HPM) sources.

show abstract

Section: Introductionmentioning

confidence: 99%

High-Voltage Drivers Based on Forming Lines with Extended Quasi-Rectangular Pulses for High-Power Microwave Oscillators

et al. 2022

View full text Add to dashboard Cite

show abstract

“…That device employed a meter-long TE 1;0;19 -mode cavity that used a rectangular ridged waveguide driven with 300 kW of rf power at 2856 MHz, but it had a relatively small K parameter (K % 0:2). In Denisov's experiment, carried out at 10 GHz, the K parameter was increased to be close to unity through the use of MW-level rf power [7]. Recently Tantawi et al…”

Section: Introductionmentioning

confidence: 99%

Configurations for short period rf undulators

Kuzikov

Jiang

Marshall

et al. 2013

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

show abstract

“…In 1983 and 1984, Y. Carmel[l] et al and G. G. Denisov [2] et al observed the EM-FEL radiation at millimeter wavebands with a relativistic backward-wave oscillator (RBWO) at 3cm as the electromagnetic wiggler, respectively. In 1995, Z.…”

Section: Digestmentioning

confidence: 99%

Study on an unmagnetized plasma-loaded two-stage backward wave oscillator and free electron laser

Yang

Liang²,

Liu³

25th International Conference on Infrared and Millimeter Waves (Cat. No.00EX442)

View full text Add to dashboard Cite

DigestFree-electron laser pumped by electromagnetic wave (EM-FEL) is a kind of laser that uses a high-power electromagnetic wave as a wiggler to generate short wavelength radiation. It has potential to produce higher frequency radiation with low energy electron beams than a free-electron laser with a magnetostatic wiggler. In 1983 and 1984, Y. Carmel[l] et al. and G. G. Denisov[2] et al. observed the EM-FEL radiation at millimeter wavebands with a relativistic backward-wave oscillator (RBWO) at 3cm as the electromagnetic wiggler, respectively. In 1995, Z. Liang [3] reported the results of an electromagnetically pumped FEL with a separated FEL interaction region from the RBWO. Plasma-filled RBWO with a strong guiding magnetic field enhances the peak power over the vacuum case by a factor of up to 8[4], and peak power of EM-FEL with frequency from 12GHz to 26GHz was measured in the experiment simultaneously. In this paper, we report the experimental and simulation results of an unmagnetized plasma-loaded backward-wave oscillator and free-electron laser.The experimental system consists of pulse line accelerator, slow-wave structure of RBWO, interaction region of FEL, gas inlet equipment and signal diagnostic system. The accelerator produces a intense relativistic electron beam(REB) with 0.4MV,2.5KA,70ns. The slow wave structure of the RB WO is corrugated cylindrical waveguide, 1 10 1 10 Argon pressure (millitorr) Argon pressure ( million) Fig. 1 Output powers from relativistic BWO and FEL vs. the background gas pressure which the ripple of the inner wall varies as sinusoid, that is, R (2) = R , + h sin (2x2 / d ) , where R = 1 .26 cm is the average radius of the waveguide, h = 0.3cm is the ripple depth, d = 1.95 cm is the wavelength of the ripple.The interaction region of FEL is a smooth cylindrical waveguide with radius 1.26cm and length 6cm. The argon gas injection apparatus involves high-pressure gas bottle, pressure degrading system and air stream adjusting system etc. The gas was injected from the down-stream end. After passing through the high-frequency interaction region, the gas was pumped out by vacuum pump. Signals from RBWO and FEL were measured by dispersion delay line and by two different wavebands millimeter waveguide, respectively.When the REB goes through the background gas, it ionizes the gas to be plasma. As the plasma has a good focus on the electron beam[5], the electron beam can be transported without external magnetic field. The electron beam interacts with structure wave in slow-wave structure to excite 3-cm electromagnetic wave, and then with the electromagnetic wave to generate millimeter wavebands FEL. When the argon pressure changed from 0.6mTorr to 20.0mTon; we observed the following phenomenon:The parameters of REB seldom changed with the variation of the gas pressure. The current and voltage were 2.5KA and 400KV,respectivity.We observed output powers from the RBWO and FEL for argon pressure between 0.75 mTorr to 15 mTorr, 0-7803-6513-5/00$10.00

show abstract

Powerful electromagnetic millimeter-wave oscillations produced by stimulated scattering of microwave radiation by relativistic electron beams

Cited by 24 publications

References 6 publications

High-Voltage Drivers Based on Forming Lines with Extended Quasi-Rectangular Pulses for High-Power Microwave Oscillators

High-Voltage Drivers Based on Forming Lines with Extended Quasi-Rectangular Pulses for High-Power Microwave Oscillators

Configurations for short period rf undulators

Study on an unmagnetized plasma-loaded two-stage backward wave oscillator and free electron laser

Contact Info

Product

Resources

About