Recent content by Ruihu Zhu

In accelerator physics, mapping matrix is often used to describe particle's motion.For a given one turn mapping matrix,namely M(s+L|s) ,and initial (x,x').After matrix multiplication, I find the value of (x,x') changes which means particle's position and angle changes at the same s after one...

In slide 9,it shows accelerator coordinate is (x,y,z,px,py,pz;h,s) where s is azimuthal coordinate.I can't understand azimuthal coordinate s in geometry.Can you explain?Thanks

In the file I present below,it shows a way to calculate luminosity in boost frame when crossing angle exists.I can't understand why luminosity calculation is done in boost frame instead of lab frame where calculations are much easier.I also have difficulty understanding lab frame,accelerator...

There's another question confusing me.In the lessons I've learned,pileup refers to muti-collision happening at the same time which causes pileup of detector signals.Pileups are not the events we are interested in.One should reduce number of pileup.But as what you reply before, detector can only...

Sir,I'd like to ask a few more questions.Does it mean inelastic collisions cause pileup?In one paper,it directly uses inelastic cross section to calculate number of pileup.I'd like to know the reason to do so.Thanks.

I've read some stuff on pileup.In one paper, it says the number of inelastic event approximately equals pileup event in detector.I don't quitely understand it.Can someone explain?Thanks