Observation of the Dynamics of a Focal Spot Using a Long-Pulse Linear Induction Accelerator

Trunev, Yu.A.; Skovorodin, D. I.; Бурдаков, А. В.; Попов, С. С.; Kolesnikov, P. A.; Данилов, В. В.; Kurkuchekov, V. V.; Atlukhanov, M. G.; Kulenko, I. V.; Arakcheev, A. S.; Astrelin, V. T.; Sinitsky, S. L.; Starostenko, A. A.; Starostenko, D. A.; Nikitin, O. A.; Politov, V. Yu.; Lee, E. S.

doi:10.1109/tps.2020.2991841

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…The diagnostic was adjusted at the angle of 30 degrees to the beam axis. The first imaging system was a photostimulable phosphor (PSP) plate [15]. The second one comprised the following components:…”

Section: Resultsmentioning

confidence: 99%

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Technique for measuring of LIA spot size on target by X-rays propagating in beam backward direction

Kolesnikov¹,

Politov²,

Li³

et al. 2020

J. Inst.

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We are propose a technique for measuring of a focal spot size directly during the shot of a radiographic facility based on a linear induction accelerator. The key feature of the proposed method is the penumbral imaging in the direction backward to the electron beam propagation. Diagnostic has been installed in a backward hemisphere of the target chamber of a linear induction accelerator. It consists of two parallel edge-knife (roll-bars with 500 mm radius of curvature), a thin BGO scintillator, and a CCD camera with a 7 microseconds shutter. The performance and operability of the diagnostic was demonstrated on the linear induction accelerator with energy of electrons of 4 MeV. The first experimental results of the beam spot measurements are presented. A radiation transport modeling of the diagnostic scheme was performed using Monte-Carlo code PRIZMA. The effect of the scattered bremsstrahlung on the penumbral image in the backward direction was analyzed.

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Section: Resultsmentioning

confidence: 99%

“…In the forward direction the pinhole diagnostic system was placed [15]. The pinhole image of the beam focal spot was captured by PSP detector.…”

Section: Resultsmentioning

confidence: 99%

Technique for measuring of LIA spot size on target by X-rays propagating in beam backward direction

Kolesnikov¹,

Politov²,

Li³

et al. 2020

J. Inst.

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show abstract

Particle-in-Cell Simulations of High-Power THz Generator Based on the Collision of Strongly Focused Relativistic Electron Beams in Plasma

et al. 2021

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Based on particle-in-cell simulations, we propose to generate sub-nanosecond pulses of narrowband terahertz radiation with tens of MW power using unique properties of kiloampere relativistic (2 MeV) electron beams produced by linear induction accelerators. Due to small emittance of such beams, they can be focused into millimeter and sub-millimeter spots comparable in sizes with the wavelength of THz radiation. If such a beam is injected into a plasma, it becomes unstable against the two-stream instability and excites plasma oscillations that can be converted to electromagnetic waves at the plasma frequency and its harmonics. It is shown that several radiation mechanisms with high efficiency of power conversion (∼1%) come into play when the radial size of the beam–plasma system becomes comparable with the wavelength of the emitted waves.

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Observation of the Dynamics of a Focal Spot Using a Long-Pulse Linear Induction Accelerator

Cited by 2 publications

References 25 publications

Technique for measuring of LIA spot size on target by X-rays propagating in beam backward direction

Technique for measuring of LIA spot size on target by X-rays propagating in beam backward direction

Particle-in-Cell Simulations of High-Power THz Generator Based on the Collision of Strongly Focused Relativistic Electron Beams in Plasma

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