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
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:
Dry run driving the whole machine through the nominal sequence from the sequencer. Check all application functionality with realistic test cases.
Assume this as given by HWC.
Huge range of tests - Machine protection will establish a detailed series of tests to be performed, with rigorous tracking of results via MTF.
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
power converter, controls, interlocks
Controls, timing, pre-pulses, analogue acquisition
Acquisition, displays, logging
Pre-pulses, low level control [cavity control, synchro, beam control, longitudinal damper], transverse damper, power systems. Diagnostics.
Synchronisation with injectors
INB, EIS, DSO approval etc.
Operation from CCC
|System||To do - full ring||Time estimate
|Access||Commission full ring
|Equipment||Kickers||Interlocks, timing Controls, monitoring, diagnostics, reliability tests|
|Septa||Interlocks, timing Controls, monitoring, diagnostics, reliability tests|
|Power Converters & magnets||
|Magnets||FiDeL, cycling etc.|
|RF||Interlocks, PM, controls, diagnostics|
|RF - TFB|
|RF - LFB|
Interlocks, settings -
|Machine protection||Beam Interlock Controller|
||realistically ongoing for 4 weeks|
|Instrumentation||Beam Loss Monitors||
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|
|Synchrotron Light Monitor|
|Abort gap monitor|
|Residual gas monitors|
|Technical Infrastructure||Beam Vacuum|
|Cooling and Ventilation|