Increasing intensity

 

 

Energy [GeV]

 Bunches Bunch Intensity Total Intensity aperture limit Collimators TCDQ TDI
pilot - safe 450 1 5 e9 5 e9 ring - 7.5 sigma All out Out Out
pilot - safe 7000 (unsqueezed) 1 5 e9 5 e9 ring - 27.8 sigma     -
                 

super pilot - safe

450 1 3 e10 3  e10   All out Out Out
super pilot - unsafe 7000 1 3 e10 3  e10       -
                 
intermediate 450 12 3 e10 3.6 e11   n1 = 6
n2=out?
na = out?
n3 = 30
 10 sigma  
  7000             -
                 
43x43 initial 450 43 1 e10 4.3 e11   as above 10 sigma  
  7000 43 1 e10 4.3 e11       -
                 
43x43 450 43 3 e10 1.2 e12  

Push towards:

n1 = 5.7
n2= 6.7
na = 10.0
n3 = 30

 ntcdq = 9
 Ntdi = 6.8
  70000 43 3 e10 1.2 e12       -
                -
                 
                 
Nominal 450        

aabs = ~ 10.0 s
asec3 = 9.3 s
aprim3 = 8.0 s
aring = 7.5 s
aprot ≥ 7.0 s
aprotinj= 6.8 s
asec = 6.7
aprim = 5.7 s
aTL = 4.5 s

   
                 

 

Fairly clear that relaxed tolerances will be the order of the day during commissioning, even when we cross gently the boundary into unsafe beams.

 

See Ralph's talk at LHCCWG May 2006