Design Of Slow-extraction Signal Source Within Proton-synchrotron Based On FPGA&DDS

From the perspective of human health, a lot of analysis and treatment of cancer by geneticdefects, radiation leaks, pollution and toxic food factors，clarify the feasibility and extensiveradiation therapy in the treatment of cancer, Further specified proton and heavy ion beams havingthe advantages of the Bragg peak characteristics in therapy, several clear impact on the biologicaleffects of radiation absorbed dose. On this basis, a brief introduction to the proton therapy medicaldevice development status at home and abroad and composition theory, analysis of the compositionand working mechanism for particle acceleration and leads synchrotron. Highlight the synchrotronbeam extraction methods and their advantages and disadvantages of the way to Japan HIMAC dualfunction of modulation as an example of the theoretical analysis. Finally, shows the relevantparameters Shanghai proton therapy devices and slow extraction mechanism proposed in this paper,tasks and technical indicators.The paper identified the target parameters of the source platform, said no to the scheme ofAnalog Frequency. Then put forward the third-order resonance excitation signal generating leadstransverse platform solution, DE2-115FPGA development boards and basic conditions andcharacteristics of AD9910/PCBZ DDS evaluation. Hardware architecture and software design. Thepaper analyzed the frequency synthesizer in a few key points, use1kHz digital low-pass filter tosimulate Gaussian noise. A7-order Butterworth Low-pass π-type Filter parameter analog outputchannels. Encouraging platform wish to achieve high frequency Accuracy. Frequency bandwidthsetting flexible frequency signal source. Experimental tests show that the frequency of the signalgenerated by the platform have met the accelerator demand indicators of slow extraction source.