Chuyu Liu 04142015 Aperture limits DX magnets sector 1 2 3 and 4 moved before pp others to be moved during switchover 9 MHz cavity moved STAR beam pipe realigned IR2 ion pump realigned AC dipole removed ID: 198283
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Slide1
Proton-Au/Al status and a beam test request
Chuyu Liu
04/14/2015Slide2
Aperture limits
DX magnets: sector 1, 2, 3 and 4 moved before
pp
, others to be moved during switch-over. 9 MHz cavity moved. STAR beam pipe realigned. IR2 ion pump realigned. AC dipole removed.
It is possible that there are more aperture problems, however, not the ones that would take us down for days. Slide3
Ramp design
time
Lorentz
factor
g
107.4
25.4
10.5
i
njection Au
i
njection
p
h
store Au (close to
g
tr
)
acceleration Au (cross transition)
acceleration
p
h
,
Au
c
ollision
p
h
+
Au
maintains same
f
rev
for both beamsSlide4
Beam test proposal
Name: Dry run for p-Au.
Purpose: Check the functionality of tape sequence and all subsystems with beam, identify possible failures, fix them before hand to improve
switch-over
efficiency.
Time: 5 hrs.