Simulation and Experiment of a Ku-Band Gyro-TWT

Wang, Jianxun; Luo, Yong; Xu, Yong; Yan, Ran; Pu, Youlei; Deng, Xue; Wang, Hai

doi:10.1109/ted.2013.2296552

Cited by 33 publications

(5 citation statements)

References 24 publications

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“…The two-parameter Weibull distribution is usually preferred in the calculation [20]. Therefore, using the Weibull distribution as an example, write the failure distribution function…”

Section: ③Hypothesis Testing and Reliability Calculationsmentioning

confidence: 99%

Reservoir recovery study with stability analysis model constructed by flat sand filling experiment-Example of well area X in Tankou oilfield

Yang

2024

Preprint

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Injecting and recovering fluids in mature oil fields is a challenging task that can have significant impact on overall recovery rates. Conventionally, the approach taken has been a combination of laboratory experiments and numerical simulations, which lack field-scale verification and prediction accuracy. To address this limitation, we propose a new methodological approach—from experimentation to data simulation to developing a solution proposal to mathematically proving the validity of the approach. The novelty of this approach lies in its ability to fast-track verification of the solution and to predict, within limitations, the expected performance under real-field conditions. In the case study detailed in this paper, we establish the relationship between permeability, crude oil viscosity, and fluid recovery rate—all key parameters—on recovery performance, assuming a fixed wellbore network configuration. The results are validated through numerical simulations. Based on these findings, we recommend a development adjustment scheme, which is then rapidly validated using a reliability analysis model for a period of one year. The scheme implementation results in exponential distribution percentiles of 0.258375 and 0.276978, indicating its effectiveness. Additionally, the DGM (1,1) model projects recovery rates of 8.93 and 12.08 for the next two time points. Based on these projections, engineering guidelines are developed recommending crude oil viscosity adjustment through blending and dosing, and adoption of a 5 mL/min water injection rate for optimal recovery performance.

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“…The two-parameter Weibull distribution is usually preferred in the calculation [20]. Therefore, using the Weibull distribution as an example, write the failure distribution function…”

Section: ③Hypothesis Testing and Reliability Calculationsmentioning

confidence: 99%

Reservoir recovery study with stability analysis model constructed by flat sand filling experiment-Example of well area X in Tankou oilfield

Yang

2024

Preprint

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“…1. TE ○ 11 gyro traveling wave tubes such as the one reported in [60][61][62] could be modified to produce variable polarization by having two input signals separately coupled to the two polarizations of the TE ○ 11 . A change of polarization between left and right could be achieved between rf pulses, the spacing of which is typically on the order of milliseconds.…”

Section: Polarization Controlmentioning

confidence: 99%

Development of a millimeter-period rf undulator

Toufexis

Tantawi

2019

Phys. Rev. Accel. Beams

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We present the design of a rf undulator at 91.392 GHz that has a period of 1.75 mm, while the minimum beam aperture seen by the beam is 2.375 mm. To confine the fields inside the undulator a corrugated waveguide is connected through a matching section to a linear taper and a mirror. After the mirror, a Bragg reflector and a matching section are used to reflect back all the fields leaking out of the mirror opening. This undulator requires approximately 1.4 MW for submicrosecond pulses to generate an equivalent K value of 0.1. Transferring such amounts of power at mm-wave frequencies requires overmoded corrugated waveguides, and coupling through irises creates excessive pulsed heating. We have designed a coupling scheme that allows coupling power from a highly overmoded corrugated waveguide to the undulator cavity through the beam pipe without disturbing the undulator fields. This system of the rf undulator and its coupling scheme allows for fast dynamic control of the polarization of the emitted light.

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“…In another development, there has been a growing interest in millimeter wave gyro-TWTs [18][19][20][21][22][23][24][25][26][27][28][29][30][31], ranging from the Ku-band [29], Ka-band [19,[21][22][23]28], Q-band [24,26], W-band [18,20,25,30,31] to as high as 250 GHz [27]. These activities will also be highlighted along with a W band gyro-TWT's role in a state-of-the-art space radar [32].…”

Section: Gyro-twt Amplifiers and A Radar Applicationmentioning

confidence: 99%

Some recent progresses on electron cyclotron maser research

Chu

2015

2015 IEEE International Vacuum Electronics Conference (IVEC)

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Over a span of five decades, the electron cyclotron maser (ECM) has undergone a remarkably successful evolution from basic research to a poweiful millimeter, sub-millimeter, and THz wave generator called the gyrotron, while continuously being enriched by major advances. Below we discuss the ECM principle and its significance, followed by an overview of recent progresses made in two specific areas: THz gyrotron oscillators and millimeter-wave gyro-TWT ampltfiers. Topics �f the talk will include selected examples of device performances, ongoing/potential applications, and relevant physics issues.Each class of vacuum electronic devices is distinguishable by its characteristic bunching mechanism to convert an electron current from DC to AC. The ECM interaction [1][2][3][4] features a simple relativistic bunching mechanism. As shown in Fig. 1, in an applied DC magnetic field (Ba) andin the presence of a perpendicular RF electric field, the relativistic cyclotron frequency (Qc) decreases (increases) for energy-gaining (losing) electrons, which results in electron bunching along the cyclotron orbit. The ECM interaction takes place in a smooth fast-wave structure, as well as allowing the resonant excitation of a very high order mode (Fig. 2). It can thus generate output powers orders of magnitude greater than previously achievable. gain energy, eB � Q c = � azimuthal / bunching .

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Simulation and Experiment of a Ku-Band Gyro-TWT

Cited by 33 publications

References 24 publications

Reservoir recovery study with stability analysis model constructed by flat sand filling experiment-Example of well area X in Tankou oilfield

Reservoir recovery study with stability analysis model constructed by flat sand filling experiment-Example of well area X in Tankou oilfield

Development of a millimeter-period rf undulator

Some recent progresses on electron cyclotron maser research

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