We study high energy proton-proton elastic scattering in the framework of Pomeron exchange model. The cross section of the process are calculated without any free parameters. Our finding is that Pomeron exchange theor...We study high energy proton-proton elastic scattering in the framework of Pomeron exchange model. The cross section of the process are calculated without any free parameters. Our finding is that Pomeron exchange theory gives perfect fits to total cross section at the energy of√s higher than 10 GeV and to differential cross section at the momentum transfer [t] less than 1.5 GeV2. For total cross section at lower energy √s ＜ 10 GeV and differential cross section at larger momentum transfer region of |t| ＞ 1.5 GeV2, the Pomeron exchange theory needs to be improved.展开更多
The present work aims to study the possible states of matter and the location of phase boundaries between hadronic gas and the quark-gluon plasma QGP. The boundary at the hadron freeze-out is also considered. Proton-p...The present work aims to study the possible states of matter and the location of phase boundaries between hadronic gas and the quark-gluon plasma QGP. The boundary at the hadron freeze-out is also considered. Proton-proton collisions at a wide range of center of mass energies are used to examine the phase transition (entropy-temperature) diagram. Local thermodynamic equilibrium is assumed at different intervals of rapidity space. The entropy of the system is expressed in terms of the multiplicity of hadron production in each interval. However, the local temperature is estimated using the average transverse momentum. The values of the critical temperatures are found at the boundaries of the phases with a quite clear description of the states.展开更多
When the diffusion exist ,we investigate the proton-proton reaction with the linear stability analysis method and find the reaction is atabie. When allowing for both diffusion and convection, we still get the conclusi...When the diffusion exist ,we investigate the proton-proton reaction with the linear stability analysis method and find the reaction is atabie. When allowing for both diffusion and convection, we still get the conclusion that PPI reaction is stable with the generating-function method.展开更多
在质子治疗中,束流强度的精准控制是确保靶区剂量均匀性的关键。针对现有系统因开环控制、非线性漂移及噪声干扰导致的调节精度不足问题,本文提出一种基于每时钟指令数(Instruction Per Clock,IPC)与数字信号处理器(Digital Signal Proc...在质子治疗中,束流强度的精准控制是确保靶区剂量均匀性的关键。针对现有系统因开环控制、非线性漂移及噪声干扰导致的调节精度不足问题,本文提出一种基于每时钟指令数(Instruction Per Clock,IPC)与数字信号处理器(Digital Signal Processor,DSP)架构的束流调节电子单元(Beam Regulating Electronic Unit,BREU)。该单元通过加速器出口电离室实时采集束流反馈信号,结合DSP实现闭环控制,并创新性引入动态查找表(Look Up Table,LUT)技术,在每次照射前校准电弧电流与束流强度的非线性关系,消除长期漂移影响。实验结果表明,该束流调节电子单元性能稳定,且具备较高的调节精度。该系统通过自适应比例-积分-微分(Proportional Integral Derivative,PID)算法与噪声抑制的协同优化,显著提升了抗干扰能力与稳定性,为质子治疗设备的临床应用提供了高可靠性解决方案。展开更多
文摘We study high energy proton-proton elastic scattering in the framework of Pomeron exchange model. The cross section of the process are calculated without any free parameters. Our finding is that Pomeron exchange theory gives perfect fits to total cross section at the energy of√s higher than 10 GeV and to differential cross section at the momentum transfer [t] less than 1.5 GeV2. For total cross section at lower energy √s ＜ 10 GeV and differential cross section at larger momentum transfer region of |t| ＞ 1.5 GeV2, the Pomeron exchange theory needs to be improved.
文摘The present work aims to study the possible states of matter and the location of phase boundaries between hadronic gas and the quark-gluon plasma QGP. The boundary at the hadron freeze-out is also considered. Proton-proton collisions at a wide range of center of mass energies are used to examine the phase transition (entropy-temperature) diagram. Local thermodynamic equilibrium is assumed at different intervals of rapidity space. The entropy of the system is expressed in terms of the multiplicity of hadron production in each interval. However, the local temperature is estimated using the average transverse momentum. The values of the critical temperatures are found at the boundaries of the phases with a quite clear description of the states.
文摘When the diffusion exist ,we investigate the proton-proton reaction with the linear stability analysis method and find the reaction is atabie. When allowing for both diffusion and convection, we still get the conclusion that PPI reaction is stable with the generating-function method.
文摘在质子治疗中,束流强度的精准控制是确保靶区剂量均匀性的关键。针对现有系统因开环控制、非线性漂移及噪声干扰导致的调节精度不足问题,本文提出一种基于每时钟指令数(Instruction Per Clock,IPC)与数字信号处理器(Digital Signal Processor,DSP)架构的束流调节电子单元(Beam Regulating Electronic Unit,BREU)。该单元通过加速器出口电离室实时采集束流反馈信号,结合DSP实现闭环控制,并创新性引入动态查找表(Look Up Table,LUT)技术,在每次照射前校准电弧电流与束流强度的非线性关系,消除长期漂移影响。实验结果表明,该束流调节电子单元性能稳定,且具备较高的调节精度。该系统通过自适应比例-积分-微分(Proportional Integral Derivative,PID)算法与噪声抑制的协同优化,显著提升了抗干扰能力与稳定性,为质子治疗设备的临床应用提供了高可靠性解决方案。
