Microwave excitation source with self-fixed amplitude technology used for high-energy medical electron accelerator

Abstract

The invention relates to a medical electron accelerator technology, in particular to a microwave excitation source with self-stabilizing amplitude technology for a high-energy medical electron accelerator, including a linear power supply for system power supply, including a reference oscillator and a phase-locked source connected in sequence , electronically controlled attenuator, modulation switch, pre-amplifier, high power amplifier, isolator, power coupling unit, power monitoring module II and control main board, said control main board includes A / D and D / A modules and main control The signal output terminal of the power monitoring module II is connected to the A / D and D / A module, the control output terminal of the A / D and D / A module is connected to the electronic control attenuator, and the A / D and D / A module The communication port of the main controller is connected with the main controller MCU, the main controller MCU is connected with the display unit, and the modulation switch is also connected with the timing controller. The invention can carry out real-time power amplitude control through its own automatic control unit, so that the output power of the excitation source can be monitored in real time and automatically calibrated.

Description

technical field [0001] The invention relates to a medical electron accelerator technology, in particular to a microwave excitation source with self-stabilizing amplitude technology for a high-energy medical electron accelerator. Background technique [0002] Medical high-energy accelerators have very high-precision control requirements for microwave signal power under different energy gears. Since microwave excitation sources may be affected by factors such as component aging and environmental temperature and humidity changes in long-term working conditions, traditional excitation The source is not enough to meet the needs of the new generation of high-energy accelerators. In traditional high-energy medical electron accelerators, the power output by the excitation source from the phase-locked source module is directly output through the power amplifier. Since the output power of the excitation source does not have the function of real-time automatic amplitude stabilization, ...

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Problems solved by technology

[0002] Medical high-energy accelerators have very high-precision control requirements for microwave signal power under different energy levels. Since microwave excitation sources may be affected by factors such as component aging and environmental temperature and humidity changes in long-term working conditions, traditional excitation Sources are not enough to meet the needs of the new generation of high-energy accelerators

In traditional high-energy medical electron accelerators, the power output by the excitation source from the phase-locked source module is directly output through the power amplifier. Since the output power of the excitation source does not have the function of real-time automatic amplitude stabilization, and the semiconductor material will be affected by the components under long-term working conditions Factors such as aging and environmental temperature and humidity changes affect the stability of parameters, which in turn causes the power to fluctuate with the environment and temperature, and even large deviations in power after long-term use, resulting in affected treatment effects

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