LHC planning

Wednesday

08h00: PS back. Injection and setup with beam. 09h00: LBDS Test. Injection protection check.

Switching off LBDS for beam 1. Correct dump. Switching off LBDS for beam 2. Correct dump. System dumped by the LBDS slow control via the BIS loop. Checking TDI for beam 1: Sensor calibration seems OK.

10h00: Check of new MQW functions with beam (during PS intervention). Tunes went off and most of beam lost. Not usable for ramp and beta beat measurements.

11-05-10

LHC planning

LBDS OFF test: Beam 1

11-05-10

LHC planning

TDI test: Sensor readings at full gap

11-05-10

LHC planning

Wednesday 13h30: RF synchronization test for LBDS. Collimation

ramp without beam. Both channels are properly connected: trims on B1 were

properly recorded on LBDS for B1 and the same for B2. We had nevertheless to trim by 1 kHz to see any change.

Collimators ramped OK. No interlock. 16h00: Beam setup at injection. 17h00: Ramp with collimators closing and orbit

feedback. Ramp down and cycle. Beam 2 heavily jumping (“dancing beam”). Orbit feedback

driving orbit correctors. Beam 2 dumped due to beam position interlock. Beam 1 up without losses and with closing collimators (primary

collimators staying at 6 sigma. No collimator interlocks. Position + gap thresholds around

closing jaw positions.

11-05-10

LHC planning

Collimator Ramp Test w/o Beam

11-05-10

LHC planning

Collimator Ramp Test w/o Beam: TCDQ

11-05-10

LHC planning

Ramp with Collimators & Orbit Feedback

11-05-10

LHC planning

Ramp with Collimators & Orbit Feedback

11-05-10

LHC planning

Ramp with Collimators & Orbit Feedback

11-05-10

LHC planning

Ramp with Collimators & Orbit Feedback

11-05-10

LHC planning

Ramp with Collimators & Orbit Feedback

11-05-10

Parasitic beta beat measurement (R. Steinhagen)

LHC planning

Wednesday

21h00: Beam setup at injection. 01h40: Start of ramp for beta beat studies.

Beam 1 dumped due to new energy-dependent gap threshold on four primary collimators.

Collimators saw energy ramping and ran out of allowed gap. Involuntary MPS test.

Not foreseen to change between two setups rapidly. Forgotten thresholds.

02h47: Beam dump 3.5 TeV. Ramp down and cycle. 05h47: Start of ramp for beta beat studies. 07h20: Start of RF studies at 3.5 TeV.

11-05-10

LHC planning

Ramps for beta beat

11-05-10

LHC planning

Ramps for beta beat

11-05-10

LHC planning

Ramps for beta beat

11-05-10

LHC planning

Ramps for beta beat: B1

11-05-10

LHC planning

Ramps for beta beat: B1

11-05-10

LHC planning

Ramps for beta beat: B2

11-05-10

LHC planning

Ramps for beta beat: B2

11-05-10

LHC planning

Ahead

11-05-10