论文标题
具有密度梯度的血浆中的质子束自调节
Proton Bunch Self-Modulation in Plasma with Density Gradient
论文作者
论文摘要
我们通过实验研究线性等离子体密度梯度对400 \ GEV质子束的自调的影响。结果表明，在10 \时观察到的微轴数量/减少微轴的数量和每个微孔的相对电荷。测得的调制频率也包括/减小。使用最大的正梯度，我们在调制功率谱中观察到两个频率。结果与Wakefields相位速度的变化是一致的，这是由于血浆密度梯度在线性理论预测的自调调体增长过程中增加了慢速韦克菲尔德的相位速度。
We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400\,GeV proton bunch. Results show that a positive/negative gradient in/decreases the number of micro-bunches and the relative charge per micro-bunch observed after 10\,m of plasma. The measured modulation frequency also in/decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields' phase velocity due to plasma density gradient adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.
