The formation of helical electron beams in an adiabatic gun

Goldenberg, A. L.; Petelin, M. I.

doi:10.1007/bf01080801

Cited by 90 publications

(16 citation statements)

References 3 publications

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“…To reduce the space charge influence, φ (angle between the emitter surface and the magnetic field line) should be greater than 25 • . In this case the laminar beam is formed and, therefore, the velocity spread growth with beam current is reduced [8][9][10]. Fig.…”

Section: Simulation and Discussionmentioning

confidence: 99%

“…From the available literature on MIG [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], the design criteria have been set up with respect to the different parameters related to the cathode, the electron beam and the anode (Table 1). Here in Table 1, J L is the space charge limited current density and r lc is the larmor radius at cathode.…”

Section: Preliminary Designmentioning

confidence: 99%

“…For the better performance of the gyrotron and the other gyro-devices, an electron beam of good quality is required [5][6][7][8][9][10]. A 3.2 MW triode-type electron gun has been designed for this tube.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Magnetron Injection Gun for 1mw 120 GHZ Gyrotron

Singh¹,

Kumar²,

Kumar³

et al. 2010

PIER Letters

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Abstract-A 40 A triode-type magnetron injection gun for a 1 MW, 120 GHz gyrotron has been designed. The preliminary design has been obtained by using some trade-off equations. Computer simulation has been performed by using the commercially available code EGUN and the in-house developed code MIGANS. The operating voltages of the modulating anode and the accelerating anode are 60 kV and 80 kV, respectively. The electron beam with a low transverse velocity spread (δβ ⊥ max = 3.3%) and velocity ratio, α = 1.38 at beam current = 40 A is obtained. The simulated results of the MIG obtained with the EGUN code have been validated with another trajectory code TRAK. The results on the design output parameters obtained by these two codes were found to be in close agreement. The sensitivity study has been carried out by changing the different gun parameters to decide the fabrication tolerance.

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Section: Simulation and Discussionmentioning

confidence: 99%

Section: Preliminary Designmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Magnetron Injection Gun for 1mw 120 GHZ Gyrotron

Singh¹,

Kumar²,

Kumar³

et al. 2010

PIER Letters

View full text Add to dashboard Cite

show abstract

“…The velocity spread, which is typical of today's gyrotron electron optical systems [5], results in the emission of both "fast" (with the high longitudinal velocity v j j ) and "slow" (with the transverse velocity v ? being close to the total velocity v) electrons.…”

Section: The Minimal Value Of the Electron Beam Energy After Interactionmentioning

confidence: 99%

A High-Efficiency Second-Harmonic Gyrotron with a Depressed Collector

Морозкин

Glyavin

Денисов

et al. 2008

Int J Infrared Milli Waves

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The gyrotron with an electrically insulated collector has been manufactured and tested. The 60% output efficiency is obtained for the Collector Potential Depression (CPD) operation regime. The results of the numerical simulation of the electron energy spectrum in the collector region of the second-harmonic technological 24 GHz gyrotron are presented. It is shown, that the minimal electron beam energy is about 20% of the initial value and that the gyrotron cavity should be expanded to achieve the highest output efficiency of the gyrotron with energy recovery. The highest experimental decelerating voltage is in good agreement with the calculation of the electron energy spectrum.

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“…Another way is to use the conventional magnetron injection gun (MIG) for the beam formation. The first step in the MIG design is the adiabatic estimation [6,7] of the MIG parameters. Here one of the most important data is the guiding center radius in the cavity R 0 .…”

Section: Cathode Coils Sc Coilsmentioning

confidence: 99%

Electron Gun for Powerful Short Pulse Gyrotron with Operating Magnetic Field 8 T

Мануилов

Idehara

Saito

et al. 2008

Int J Infrared Milli Waves

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High power short pulse gyrotron with operating frequency 395 GHz operating on the second cyclotron harmonic is now under developing at FIR FU. The gyrotron is planned to use in future experiments for plasma diagnostics. For this purpose the output power about 100 kW and pulse duration 100 ns at least are needed. Preliminary estimations of parameters of some versions of the electron guns with accelerating potential U 0 =70-100 kV were performed. Possibilities of non-adiabatic as well as adiabatic guns were considered. It was shown that non-adiabatic system is not reliable for such rather low value of U 0 , the adiabatic magnetron injection gun (MIG) is more preferable for the gyrotron design. Analytical estimations of the suitable MIG dimensions and operating regime to form good quality electron beam were fulfilled. Numerical optimization of the gun shape and position was performed. It was shown that in spite of the extremely big ratio of the operating current (I 0 =18 A) to the Langmuir current of the gun, close to 0.4-0.5, the suggested MIG can form the helical electron beam (HEB) which is suitable for gyrotron operation properties.

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The formation of helical electron beams in an adiabatic gun

Cited by 90 publications

References 3 publications

Numerical Simulation of Magnetron Injection Gun for 1mw 120 GHZ Gyrotron

Numerical Simulation of Magnetron Injection Gun for 1mw 120 GHZ Gyrotron

A High-Efficiency Second-Harmonic Gyrotron with a Depressed Collector

Electron Gun for Powerful Short Pulse Gyrotron with Operating Magnetic Field 8 T

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