Conveners
Session 2 - Scheduling LHC Operation
- Roger (Chairman) Bailey (AB-OP)
- Paul (Scientific Secretary) Collier (AB-OP)
Dr
Roger Bailey
(CERN)
17/01/2005, 14:00
Scheduling LHC Operation
In the first years of LHC running, several different modes of operation will have to
be accommodated. As an introduction to the session on scheduling, the proposal for
early proton running will be outlined, the first ideas for the breakdown of a year
will be recalled, and a possible timeline for the first few years will be presented.
Dr
Jan Uythoven
(CERN)
17/01/2005, 14:15
Scheduling LHC Operation
oral
Before the first LHC beam operation and following the LHC hardware
commissioning a cold checkout period is required to check the
simultaneous functioning of the various LHC subsystem in their final
configuration. Following this cold checkout period a set-up period
with beam is required to verify the proper operation of all
equipment, including the machine protection system, with...
Dr
Jose Miguel Jimenez
(CERN)
17/01/2005, 14:35
Scheduling LHC Operation
To achieve its nominal performances, the LHC relies on the scrubbing runs to both
improve the dynamic vacuum (beam lifetime) by a vacuum cleaning effect and decrease
the electron cloud induced limitations (heat load and beam instabilities) by a beam
conditioning effect.
An optimum scrubbing run scenario will be presented based on the vacuum cleaning
and beam conditioning results in...
Dr
Ghislain Roy
(CERN - AB DEPARTMENT)
17/01/2005, 15:00
Scheduling LHC Operation
The LHC access system is the outer safety shell of the LHC
underground instalations
and can help (hopefully not hinder) the smooth operation of the LHC
First a description of the accessible parts of the installations in
different modes
(beam, shutdown, short access...) and what areas of the machine will
or will not be
accessible for regular maintenance (scheduled or not) and quick...
Thomas pettersson
(TS/CSE)
17/01/2005, 15:40
Scheduling LHC Operation
In view of the very complex equipment making up the LHC machine and its many
ancillary subsystems, equipment maintenance policies will play a primordial role to
ensure an optimal availability. As access to most of the machine systems is
strictly regulated, maintenance interventions will require global co-ordination and
collaboration from both CERN equipment groups and industrial support...
Dr
Daniela Macina
(CERN)
17/01/2005, 16:00
Scheduling LHC Operation
oral
The experiments’ requirements for the initial commissioning of the
detectors, like
single beams and early collisions, will be addressed as well as the
annual shutdown
requests. Special needs, like the polarity switching of the LHCb and
ALICE dipoles,
will also be mentioned. The experiments’ requests for the Pb82 runs
and special
proton runs will be discussed. Possible special...
Dr
John Jowett
(CERN)
17/01/2005, 16:25
Scheduling LHC Operation
oral
Pre-requisites for switching from p-p to Pb-Pb operation of the LHC
(optics,controls, vacuum, instrumentation, etc.). Plan for
commissioning the main rings with lead ions. Differences from p-p
operation (RF, vacuum requirements, beam instrumentation, separation
and optics in collision). Evolution of beam intensity,emittance and
luminosity; effect of vacuum, the number of experiments...
Dr
Jorg Wenninger
(CERN)
17/01/2005, 16:50
Scheduling LHC Operation
oral
The TOTEM experiment requires special running conditions in terms of
beams, optics and stability around IR5.In addition TOTEM requests
short one day runs at regular time intervals. Similar requirements
apply to luminosity measurement runs at IR1. Dedicated time will have
to be devoted to the commissioning of the TOTEM machine cycle and for
each run, additional setup time must be...
