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:

• Drive all relevant systems in a synchronized way through the standard operational sequence
• Check functionality of the control system from the control room high level applications 
• Check the beam instrumentation acquisition chain
• Check low synchronization
• Check all equipment control functionality
• Check machine protection and interlock systems

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.

Approach

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:

Phase 1: INDIVIDUAL SYSTEM TESTS

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:

• Injection Dry Run - December 2007

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.

• Cryogenics
• QPS & energy extraction
• Powering interlocks
• Vacuum

Detailed breakdown

Controls

Test::

• 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.
• Settings etc.:calibrations, optics, transfer functions, ramp, squeeze… FiDeL, bumps, crossing angles etc. etc.

Interlocks/Machine Protection

• Hardware: test all systems, establish BPF etc., PICs - test all circuits
• Software Interlocks
• User permits: BLMs, BPMS, screens, RF, Collimators etc. etc. - big job
• Equipment interfaces, links, logic, controls,
  PIC, WIC, BIC, Safe Beam Flags
  Software interlocks
  QPS, Energy extraction
  displays, diagnostics, post-mortem, recovery
  Energy meter

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

• BST
• BPMs - simulated acquisition, correction and send to hardware
• Screens:  movement, acquisition, display, logging,
• BLMs: acquisition chain
• BCT
• Kickers, tune meter
• pre-commission, timing, acquisition tests, interface to control system

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

• Timing
• State control
• Trims
• Functions
• Monitoring
• Real-time channel
• tracking
• ramping, squeezing, real-time

Plus re-calibration, tracking between sectors etc

Collimators etc

• Synchronized positioning
• Read back
• Logging
• Failure scenarios

Septa

power converter, controls, interlocks

Kickers

Controls, timing, pre-pulses, analogue acquisition

Radiation Monitoring

Acquisition, displays, logging

RF

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

Beam Dump

• timing, post-mortem, inject and dump
• reliability tests

Magnets

test

• Errors: all circuits, full cycle, geometric, beam screen, saturation  eddy, Persistent currents
• powering history dependent model
• Cycle path – all magnets
• Transfer functions for all magnet circuits
• hysteresis behaviour for corrector circuits where appropriate
• Strategy for: excitation of nested correctors cycling nested pc/magnets

Access system

INB, EIS, DSO approval etc.
Operation from CCC

Experiments

Test

• Data interchange
• Beam aborts
• Injection interlocks