R.Giachino / M.Albert Be/op 5 April 2015 LHC Machine check out 1v1

S 34 ● S 56 RB.A56 Circuit QPS communication problem – Reset B16R5, the crate is saturated ● Piquet called In ● Needed access ● Intervention in Pt5 finished. ● QPS in C16.R5 back to normal. 2 U_DIODE = -15 V U_MAG = -15 V

Cryo ● Cryo S34 conditions back at 2:00 pm ● All points ok 3 Cryo Maintain 78

Machine Precycle ● Precycle all sectors first time !! ● Machine at injection 4

Preparing for TL tests ● TDI in IP2 and IP8 closed: – Left jaw parallel (LU and LD) to 8 mm, – Right jaw parallel (RU and RD) to 4.5 mm – LD to 3.6 mm, RD to 0.1 mm ● TL’s handshake 5

Extraction to TED ● Extraction to downstream TED. – The extraction failed when the SPS was on LHC frequency – Succeeds when the SPS was on local frequency. ● Beam extracted downstream TED’s 6 Problem fixed by Thomas

Machine check & Beam Permit Loop ● Opening vacuum valves with the sequence ● Opening valves manually around kickers 7 Beam Permit Loop Closed

Synchronisation ● Synchronisation check ● Disable injection kicker ● TCTPV4L2.B1 was too closed 8 Beam on TDI

Synchronisation ● TCTPV.4L2.B1 at parking position 9

Machine Preparation ● TI2 and TI8 TEDs back IN ● Collimators set for threading ● VVGS closed for interlock propagation test ● Interlock was correctly propagated to EXT1 BIC of SPS 10

LBDS MP tests ● LBDS machine protection tests ● LBDS commissioning test 5.1 for B1. ● LBDS commissioning test 5.1 for B2. ● LBDS commissioning test 4.2 for B1/B2. 11 N.Magnin & Jorg

Preparation BI ● BBQ and BFSU Energies are now all reported correctly 12

Tentative plan ● Friday Sector 34 circuits operational ● Beam loop closed Thursday evening ● LBDS –BIS machine protection tests ● Machine Cycle all sectors together ● Beam to downstream TED ● Check synchronization LHC-Injectors chain ● First beam not before Sunday morning 13

Plan ● For B1 & B2: ● Bring the beam to the TDI, ● Open TDI and go to next point blocked by collimator, ● Steer the trajectory, ● Open collimator, ● Repeat point by point until the beam makes one turn. ● When one turn is established try to increase the number of turns (better trajectory, move tunes etc...) until >= 40 turns. ● Try to capture the beam with the RF. 14

Plan ● When both beams circulate, check out the key instrumentation, starting with orbit and tune. ● Improve the orbit correction, steer back the transfer lines ● Measure chromaticity and dispersion. ● Try out the other instruments ● Over-night: ● Continue the commissioning and testing. ● Polarity checks of orbit correctors and tune trim circuits. 15

Tentative Plan ● Monday ● RF work: delays, loops etc ● Continue BI commissioning, including timing. ● Clean-up orbit. ● First quick test of the orbit, tune and radial feedbacks. ● Evening/night ● Splashes ● Polarities continued 16

Beams on the downstream TED’s 17