Exit Conditions of Phase A.2:

 

Objective

Priority

O.A.2.1

Machine parameters according to tolerances [note 1]

1

O.A.2.2

Beam captured

1

O.A.2.3

Beam instrumentation

 

.01

BPM: acquisition, intensity mode

1

O.A.2.4

Measurements

 

.01

Fast physical aperture scans, free oscillations with BPM intensity meas.

1

O.A.2.5

Controls and applications

 

.01

RF signals and triggers in OASIS (phase pick-up, wall current monitor, peak detected signal, frev, fRF,….) available

1

.02

Synchronization diagnostics tools tested (Injection bucket error and mountain range applications)

1

.03

RF controls (frequency, voltage, phase, bucket position, …..)

1

.04

Multi-turn trajectory acquisition

1

O.A.2.6

RF systems

 

.01

RF cavities operational with pilot bunches

1

.02

Phase-loop operational

1

.03

Synchro-loop operational

1

.04

Observation equipment set-up (wall-current monitor)

1

.05

Fine synchronization SPS/LHC commissioned

1

O.A.2.7

Magnets

 

.01

MQs: Major errors disturbing integer tune found and possibly corrected

1

.02

MBs: Energy mismatch between arcs and SPS to LHC corrected to few 10-4

1

 


 

Notes on exit conditions

  1. Tolerances aimed at for this phase:

    • Closed orbit corrected down to less than 2 mm r.m.s.

    • Of the order of 1000 turns or more.

    • Maximum acceptable radial offset: 0.5 mm

    • Tune: 64.28 / 59.38 (tune for commissioning) within few 0.01

    • Octant-to-octant MB field offset to few 10-4

    • Chromaticity to 10-20 units (to minimize de-coherence of oscillations); 1000 turns dynamic aperture requires |Q'| < 80

    • Coupling to few 0.01

    • SPS-LHC energy matching to few 10-4