Stable beams 11:26 All Roman pots to 30 sigma Modification to the longitudinal damper: increase of max

amplitude from 0.6 deg rms to 1 deg rms @ 40 MHz. 17:03 Lost beams

Multiple FMCM Instability on the electrical network 17:02:53.

Evening There is no more limit on the range of acceptable injection

bucket number. The previous problem with bucket 29701 is solved...

Alice compensators trip. TI confirmed an electrical instability at the same time (21:47) the two experimental compensators tripped.

Wednesday 14th July

1

With a huge effort and a "temporary fix" the MPS team have the supply up and running once more.

“The MPS experts have all understood this temporary fix”

22:15 Final PSB problem – inverted quadrupole polarity 22:45 Beam back 23:49 RF problem at the PS and the injected indiv in the

SPS is not clean (it has satellite bunches...).

Wednesday evening

2

04:18 Stable beams – fill 1226 13 bunches 8_8_8 – providing a truly non-colliding bunch Scan CMS, LHCb, Atlas, adjust Alice 1.2 Hz microbarn-1

05:55 Totem: All pots are now at 30 sigmas. Starting the acquisitions.

06:52 All vertical pots moved to 25 sigmas. Note some FESA issues

Thursday 15th July morning

3

1225

4

Hump

5

Stop physics midday Hump investigations at 450 GeV

GSM off in tunnel ~ 2 hours [Multi-bunch injection from SPS]

Bren & co – 1 shift – pushed to Friday Physics

LHCf would like some more low pile-up data - will be tried with one additional colliding pair at IP1/5 with about half nominal intensity - requires some checks at injection.

Single_14b_9_8_8 (with a low pile-up bunch in RF bucket 1) or variant

Today

6

ghosts…