Moving to higher energy (preliminary)

From 3.5 TeV to 4 to 5 TeV. On the list:

Task Comment Time estimate
Hardware commissioning of main circuits to higher energy
  • Modification and testing of dump resistors
  • Possible installation of snubbing capacitors for QPS
  • Calorimetry and detailed QPS measurements - all sectors
~2 weeks
Qualification of machine protection to higher energy without beam FMCMs, PIC, Collimators, TCDQ, BLMs, BPM interlocks, SMPs, RF, LBDS In parallel with HWC
Operations dry runs of qualified sectors Ramp, squeeze to/at higher energy Sector by sector - after hand over from HWC
     
Re-commissioning of ramp and associated machine protection appropriate to the higher energy With safe beam. Machine protection: LBDS, BLMs, RF  ~1 week
Re-commissioning of squeeze Could possibly ramp-squeeze-ramp which would avoid the need of recommissioning the 3.5 TeV squeeze.
Optics and operations checks at high energy   ~2 days
Re-optimisation of collimators   ~4 days

Possible Strategy

 

ML August 09