论文标题
3 tev PWFA线性对撞机的$γγ$ beam beam参数研究
$γγ$ Beam-beam Parameter Study for a 3 TeV PWFA Linear Collider
论文作者
论文摘要
我们使用光束梁模拟和PWFA（粒子驱动的等离子体加速度）束参数的光束参数研究表明，在3 TEV时，对于所检查的电子束长$ {2〜μ \ Mathrm {m} \leqσ_z\leqσ_z\ leq leq leq 10〜μ \ mathrm {m {m} $，以及lum and lum and lum and lum and lum and lum and。 $γγ$对撞机与用于散射光子的电子光束的光束长度无关，因为避免了沙漏效果。因此，可以在相互作用点最小化水平和垂直β函数$β_{x，y}^*$，从而最大程度地提高总发光度。 此外，我们在几内亚 - 皮格（Guinea-Pig）进行了背景研究，其中我们考虑了当前可实现的$β_{x，y}^*$与PWFA束参数结合的最小的$β_{x，y}^*$。模拟结果表明，我们提出的针对3 TEV PWFA $γγ$ Collider的参数能够根据CLIC参数显着高于$γγ$ collider的总亮度，但引起了更多背景粒子。
Our beam-beam parameter study using beam-beam simulations and PWFA (particle-driven plasma acceleration) beam parameters indicates that at 3 TeV, for examined electron beam lengths ${2~μ\mathrm{m}\leqσ_z\leq 10~μ\mathrm{m}}$, the total luminosity, as well as the sharpness of the luminosity spectrum for a $γγ$ collider are independent of the beam length of the electron beams used to scatter the photons, given that the hourglass effect is avoided. The total luminosity can consequently be maximised by minimising the horizontal and vertical beta functions $β_{x,y}^*$ at the interaction point. Furthermore, we performed background studies in GUINEA-PIG where we considered the smallest currently achievable $β_{x,y}^*$ combined with PWFA beam parameters. Simulations results show that our proposed parameter set for a 3 TeV PWFA $γγ$ collider is able to deliver a total luminosity significantly higher than a $γγ$ collider based on CLIC parameters, but gives rise to more background particles.
