PSB Start-up 2014

KHMSWG 15/08/2014

K. Hanke for the PSB OP and Supervisor Team

KHMSWG 15/08/2014

Key Datesend LS1 beam to PSB

beam to PS

TODAY• 13 May start cco• 23 May DSO test• 2 June beam injected• 19 June first beam to PS• 24 July first beam to ISOLDEbeam to ISOLDE

Some Words on the Cold Check-out

KHMSWG 15/08/2014

• with the end of the hw test period, the shutdown is over and there is no more access to the machine, except for emergency interventions; all maintenance work is supposed to be completed

• point (1) was not respected by all equipment groups• the septum leak intervention “leaked” slightly into the cco period (but this is

of course excused)• delayed items comprised: dump ventilation and cabling for dump

ventilation; cabling for beam stoppers• otherwise the cco went reasonably well, and the allocated time was

sufficient

Start-up

KHMSWG 15/08/2014

• beam permit signed Friday 30 May (after sorting out some fencing issues at the surface

• Monday 2 June first beam injected into the BI line around lunch time• first beam (4E10) injected in R3, lost after 5 ms• afternoon small intensity accelerated in all 4 rings• Tuesday-Wednesday optimising injection, debugging instrumentation, RF

setting up

Monday Tuesday

Beam Instrumentation Issues

• no injection BPM acquisition available• no extraction BPM acquisition available; steering with screens• SEM grids vertical plane not working• some issues with applications• BLMs: many not working (still ongoing)• etc etc• long list of BI issues being worked on during the first weeks of operation

KHMSWG 15/08/2014

injection trajectories ejection trajectories

Beam Instrumentation Issues

KHMSWG 15/08/2014

Other Problems

KHMSWG 15/08/2014

• FGC3s had many issues• ISOLDE line bending magnets pulsing at wrong values, in particular

BTY.BVT301 which switches between the two targets (only BIC prevented…)

• access system: many issues concerning all machines, patrols lost, etc.

• beam stoppers: cabling was not ready, which led to beam being dumped on the beam stoppers (not authorized)

• cotton in the cooling circuits of the magnets, led to overheating of two magnets and tripped the MPS

• short circuit on BT.BHZ10, longer intervention• BTY line quadrupole and steerers with inverted polarity• wrong alignment of the injection pick-ups

in particular for the safety relevant systems (e.g. ISOLDE bendings, beam stopper) the check out needs to be more rigorous, maybe signature?

Start-up Summary

KHMSWG 15/08/2014

• first beam in the machine rapidly• controls reasonably OK, issues attacked as they arose; the CO dry runs and

good preparation paid off• new LL RF successfully commissioned, RF specialists were working round the

clock and did a great job• many, many issues, in particular related to BI• first beams prepared: ISOLDE; then a h1 for PS setting up followed by EAST,

TOF, AD• today: we are at ~2600E10 for ISOLDE (nominal >3000); we have not yet

SFTPRO, nor the LHC-type beams

2 ½ months after first beam, we are still not at nominal performance this gives us a first idea of what we have to expect after LS2

2012 PSB Start-upK.Hanke for the PSB OP & SV team

2014 PSB Start-uphttp://www.darbaroud.com/en/