LHC Post Mortem Workshop - I

Session

Session 3

S3

17 Jan 2007, 09:00

874/1-011 (CERN)

Description

Operation with beam - PM requirements

9. Beam quality checks at injection

Verena Kain (CERN)

17/01/2007, 09:00

For each beam injection into the LHC a well-defined series of beam quality checks needs to be made, starting in the SPS just before extraction and in the LHC immediately after injection. These checks will be dependent on the beam type, intensity and position in the filling sequence, and will use transient data which must be acquired and analysed at the appropriate time and within...

10. Beam dump XPOC analysis

Brennan Goddard (CERN)

17/01/2007, 09:30

Each dump action must be followed by an XPOC which is launched automatically and is designed to verify that the dump was correctly executed. If an anomaly is discovered during these tests, the XPOC must withhold the User Permit to the BIS (via a software channel). The XPOC comprises beam instrumentation and other signals which will come from the logging and Post- Mortem system, or...

11. Emergency dump Post Mortem

Jorg Wenninger (CERN)

17/01/2007, 10:00

After an emergency dump a general Post-Mortem request will be issued to acquire transient data from a variety of systems. The analysis of a Post-Mortem event may take from minutes to many months, depending of the desired level of details. Key data must be however presented in a way which allows for simple and efficient fault-finding. Operation crews must be presented with clear...

12. Transient beam data acquisition

Canceled

17/01/2007, 11:00

In addition to systematic transient data acquisition, operation of the LHC will also require the possibility to make ad-hoc acquisition of some transient beam and possibly equipment data, in order to diagnose and solve specific problems and to cope with unforeseen difficulties. An attempt is made to outline the different transient data required for general operational purposes,...

13. Post Mortem acquisition triggering

Julian Lewis (CERN)

17/01/2007, 11:30

A post-mortem timing event distributed by the LHC machine timing system is used to freeze the PM buffers of a large fraction of the LHC equipment. This event must be generated automatically whenever the BIS is issuing a beam dump request by changing the state of the beam permit signal. This presentation outlines the present ideas on how to generate the PM timing event. The issue...