Machine Checkout

See LHC Machine Checkout web site for more details and progress (As from August 2008).

ML - last update January 2008 (See also LHC OP Wiki)

Following the end of Hardware Commissioning a machine checkout by operations is foreseen. The aims of this checkout are:

Need to establish a rigorous test regime, in particular for data acquisition, so that we can fully test the chain before beam.

Resources will be tight, but I suspect a lot of the following can be done in parallel with hardware commissioning. (For sector 7-8 and 8-1, for a sector test, depending on the state of play at the end of hardware commissioning, around two weeks should do it.)

The machine checkout will be coordinated by Operations with the support of equipment specialists, HWC team and be performed from the CCC.


2008 will be challenging with a clear potential overlap with hardware commissioning. We are going to have to watch interference, either system by system or sector by sector.

Split this down into:


Individual system tests using the high level application software. Here we check timing, acquistion, control etc. etc. in agreement with the relevant equipment group. We should attempt to document the required list of tests/actions for each equipment type. Would image one/two person(s) being given responsibility for ensuring (either doing or supervising) thorough execution of tests.

The IST are described in detail under the LHC OP Wiki - Individual System Tests

Phase 2

Multi-system tests such as machine protection (e.g. BLMs to BIS to beam dump). Although such tests do not preclude parallel activity, it's clear that certain individual system tests will have to be finished or suspended during this phase.

Drive this with dry runs:

Phase 3

Dry run driving the whole machine through the nominal sequence from the sequencer. Check all application functionality with realistic test cases.


Technical infrastructure from CCC

Assume this as given by HWC.

Detailed breakdown




Interlocks/Machine Protection

Huge range of tests - Machine protection will establish a detailed series of tests to be performed, with rigorous tracking of results via MTF.

Beam Instrumentation

Power Converters

Full functionality of digital controllers plus world FIP, gateways, network
Standard high-level control functionality: cycle, ramp, set, trim, alarms, interlocks, states, tolerances
Acquisition: debugging, tracking studies...
Appropriate handling of nested power supplies

Plus re-calibration, tracking between sectors etc

Collimators etc


power converter, controls, interlocks


Controls, timing, pre-pulses, analogue acquisition

Radiation Monitoring

Acquisition, displays, logging


Pre-pulses, low level control [cavity control, synchro, beam control, longitudinal damper], transverse damper, power systems. Diagnostics.
Synchronisation with injectors

Beam Dump




Access system

INB, EIS, DSO approval etc.
Operation from CCC




  System To do - full ring Time estimate
Access   Commission full ring
EIS tests
Acceptance tests
Operational procedures
Equipment Kickers Interlocks, timing Controls, monitoring, diagnostics, reliability tests  
  Septa Interlocks, timing Controls, monitoring, diagnostics, reliability tests  
  Power Converters & magnets
  • Cycling
  • Full machine ramp & squeeze
  • Tracking
  • Check all tolerances, monitoring
  Magnets FiDeL, cycling etc.  
  RF Interlocks, PM, controls, diagnostics  
  RF  - TFB    
  RF - LFB    

Interlocks, settings -
Ramp & squeeze, monitoring

  Beam Dump
  • Reliability run
  • XPOC tests
  • PM tests
  • Interlocks
Machine protection Beam Interlock Controller    
  Software Interlocks    
  • Signal acquisition
  • Logging 
  • Post Mortem
  • Fixed Displays
  • Equipment control
  • Settings generation and download
  • Alarm system
  • Slow timing, fast timing, synchronisation
  • Alarms, logging, post mortem, fixed displays
  • Equipment control & access
  • Analogue acquisition
  • Software: measurements, trajectory acquisition and correction, ramping etc. etc.
  • Controls infrastructure: servers, databases etc.
  • Sequencer, injection management
  • Procedures for sliding bumps etc. etc.
realistically ongoing for 4 weeks
Instrumentation Beam Loss Monitors
  • Interlocks - interface to BIS - part of machine protection tests
  • Help with radioactive source testing - implies that most of the following is in place - automatic surveillance
  • Naming, configuration, database etc. - critical that this is right.
  • threshold management - critical settings, configuration, naming etc.
  • acquisition chain, 
  • concentration, 
  • XPOC,
  • Post mortem,
  • Study buffers,
  • BST,
  • time-stamping
  • collimator - local RT feed
  • fixed display
  • logging - measurement and logging database configuration
  • alarms
  • routine tests - definition and invocation from sequencer

before moving to the cross-systems checks


  Beam Current Transformers Timing, acquisition, logging, PM, fixed displays.  
  Beam Position Monitors Timing, acquisition, concentration, logging, PM, fixed displays, real-time  
  Wire Scanners    
  Synchrotron Light Monitor    
  Tune measurement    
  Chromaticity measurement    
  Abort gap monitor    
  Radiation monitors    
  Residual gas monitors    
Technical Infrastructure Beam Vacuum    
  Cooling and Ventilation    
  Cryogenics Plant    
  Cryostat Instrumentation    
  Electrical Network    
  Insulation Vacuum    
  Powering Interlock    
  QRL Instrumentation    
  QRL Vacuum    
  Quench Protection    
  Radiation Monitors