LHC Performance Workshop - Chamonix 2010

Session

Session 5 - Access System and Radiation Monitors

S05

27 Jan 2010, 08:30

Chamonix

Presentation materials

paper

Summary_of_Session_5.docx

Summary_of_Session_5.pdf

Summary_of_Session_5.ps

19. How did the LHC access system perform in 2009?

Laurette Ponce

27/01/2010, 08:30

As in 2008, the access system has been used in different configurations all along the 2009 year, following the machine status: shut-down (plus reparation), powering tests period and finally beam operation. The performances following the different evolutions introduced during the year and the issues, solved or still pending, will be reviewed during the presentation. The list of needed...

20. How should the access system be operated while LHC is not in beam operation?

Julie Coupard

27/01/2010, 09:00

There are 2 periods where the beams in the LHC machine are stopped; the “Shutdown and Commissioning” period and the “Technical Stop”. This talk will define how these different periods should be organized (scheduling, coordination, safety, access... ), and explain how the access system will be operated for personnel safety.

21. Is there a need for re-sectorization and/or additional interlocks?

Marc Tavlet

27/01/2010, 09:25

The presentation explains the objectives and justifications, as well as the drawbacks of the current LHC sectorisation and the LASS/LACS. The lessons learnt from the September-2008 incident impose more constraints. New constraints linked to safety as well as to exploitation are reviewed. How can the new requests be addressed? Should the sectorisation be revised ? Would that imply more sector...

22. Impact of safety related requirements and evolutions on LASS and LACS

Rui Nunes

27/01/2010, 10:20

This paper will address the issues concerning the potential implementation impact of the main types of recent requirements and evolutions, in the light of the return of experience of the operations in 2009. The types of requirements can be divided into three categories: technical improvements, design modification & scope increase, and finally operational & procedural improvement. The phasing...

23. How to achieve satisfactory performances of the access system: stability, efficiency, operation, fluidity ?

Timo Hakulinen

27/01/2010, 10:45

Heavy utilisation of the access system during LHC hardware commissioning has uncovered shortcomings in the performance of the system. While generally available to operation as required, response of the system has sometimes been below expectations of its users and operators. Reasons for these problems are both technical and procedural. Issues have been found in both hardware and software as...

24. Arcon/Ramses: Current status and operational risks

Doris Forkel-Wirth

27/01/2010, 11:10

The levels of ionising radiation around the LHC injector chain are monitored by the ARCON system (born with LEP), the ones around the LHC by the state of the art system RAMSES. The talk will present the consequences for beam operation in case of technical failures of the monitoring system(s), the strategy chosen to replace ARCON with RAMSES and the corresponding mile stones of the initial...