Design, simulation and analysis of beam optics and solenoid of high-power gun for RF power source

Iqbal, Munawar; Zhou, Zhang; Xiao, Ouzheng; Rehman, Muhammad Abdul; Wang, Sheng-Chang; Zaib, Un-Nisa; Zhang, Zhandong; Pei, Guoxi

doi:10.1016/j.nima.2021.165703

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…SINBAD facility at DESY used solenoids for beam focusing and studied the limit of their misalignment. 10 Solenoids are also used in high power gun for RF sources 11 . Axisymmetric magnetic field produced by a solenoid increases the electron beam transport by confining the beam and make it harder for its suitable application in microwave amplification.…”

Section: Introductionmentioning

confidence: 99%

Accurate determination of the magnetic axis of a solenoid using measured field data and understanding the beam dynamics

sinha,

Malik

2023

Preprint

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Fundamental understanding of both the theory and the measurement procedure of a solenoid is the key to execute the project cost effectively and to achieve the desired performance. Attempt is made to understand the beam dynamic of charge particles by considering the conservation of canonical angular momentum of non-zero values. Analytical expression to generate a parallel beam using solenoid is derived. Effect of final beam size on the values of spherical aberration coefficient and focal length of a solenoid is studied using electron trajectories. Practical procedure to tune the above two parameters of a solenoid by simple modification is demonstrated. Mathematical model is derived to accurately determine the axis of a solenoid and the magnetic centre using measured magnetic field data and experimentally demonstrated the validity of the theory. Several solenoids are characterised using the procedure and used in the 9.5 MeV 10 kW electron LINAC which is appropriate for the use of sterilization of medical products and food irradiation.

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Section: Introductionmentioning

confidence: 99%

Accurate determination of the magnetic axis of a solenoid using measured field data and understanding the beam dynamics

sinha,

Malik

2023

Preprint

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Dynamics of charged particles in a solenoid and the accurate determination of the magnetic axis of a solenoid using measured field data

Sinha,

Malik

2024

Sci Rep

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A fundamental understanding of the theory and measurement procedures for characterizing a solenoid is crucial for making a project cost-effective and achieving the desired performance for its use in a LINAC. This paper attempts to comprehend the beam dynamics of charged particles by considering the conservation of canonical angular momentum, which can take on positive, negative, and zero values. The analytical expression to generate a parallel beam using a solenoid is derived. The effect of the final beam size on the values of a solenoid’s spherical aberration coefficient and the position of the minimum beam size with respect to the focal length is studied using electron trajectories. A practical procedure to tune the above two parameters of a solenoid is demonstrated by simply modifying the demountable disks connected at each end. A mathematical model is proposed to accurately determine the axis of a solenoid and the magnetic centre using the measured magnetic field data, which is validated experimentally. Several solenoids, used in the 9.5 MeV 10 kW electron LINAC suitable for sterilizing medical products and food irradiation, have been characterised using this procedure.

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Reflection power suppression for solid state amplifiers with combiner optimization

Chen

Zhu

et al. 2023

Review of Scientific Instruments

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The application of high-power solid state amplifiers (SSAs) in accelerator facilities is increasing, and equipment failure caused by reflected power is the main risk to their long-term operation. High-power SSAs often comprise multiple power amplifier modules. Full power reflection is more likely to damage the modules in SSAs if the amplitudes of the modules are unequal. Optimization of the power combiners is an effective means for improving the stability of SSAs under high power reflection. This study analyzes the mechanisms and conditions of reflected power generation using the scattering parameters of the combiner and proposes an optimization scheme for the combiner. The simulation and experimental results show that some modules may receive reflected power as high as nearly four times the rated power of one module when the SSA meets certain conditions, which could damage the modules. The maximum reflected power can be effectively reduced and the anti-reflection ability of SSAs can be improved by optimizing the combiner parameters to suppress the maximum reflected power.

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Design, simulation and analysis of beam optics and solenoid of high-power gun for RF power source

Cited by 3 publications

References 11 publications

Accurate determination of the magnetic axis of a solenoid using measured field data and understanding the beam dynamics

Accurate determination of the magnetic axis of a solenoid using measured field data and understanding the beam dynamics

Dynamics of charged particles in a solenoid and the accurate determination of the magnetic axis of a solenoid using measured field data

Reflection power suppression for solid state amplifiers with combiner optimization

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