Conveners
Session 3 - Preparation of Restart in 2005-2006
- Roland (Chairman) Garoby (AB/RF)
- Rende (Scientific Secretary) Steerenberg (AB/OP)
Dr
Elias METRAL
(CERN)
14/01/2005, 09:00
Preparation of Restart in 2005-2006
The PS&SPS complex has to provide 4.5 10^19 protons on CNGS target
per year. This
number was initially based on the SPS intensity record obtained in
1997 (4.8 10^13
p/p at 400 GeV/c). During high-intensity tests in September 2004, a
new intensity
record has been established, exceeding by more than 10% the previous
one, with
reasonable losses. This talk reviews what was expected...
Elena Shaposhnikova
(AB/RF CERN)
14/01/2005, 09:20
Preparation of Restart in 2005-2006
The nominal proton intensity per CNGS pulse is 4.4x10^{13}.
This number is only slightly below the intensity record achieved in
the SPS
in 1997 after careful tuning of all the accelerator complex.
Since this time the PS and SPS machines have had major upgrades in
preparation for the LHC beam.
In September 2004 a total intensity
of 5.3x10^{13} was accelerated to top energy in the...
Dr
Massimo Giovannozzi
(CERN)
14/01/2005, 09:40
Preparation of Restart in 2005-2006
Since the year 2002 intense efforts were devoted to the experimental
verification of
the proposed multiturn extraction based on beam capture inside
stable islands of
transverse phase space. Such an extraction is aimed at reducing the
losses of the
present Continuous Transfer used for the fixed target physics
programme at the SPS
and in particular for the high-intensity beam for...
Dr
Michael Benedikt
(CERN)
14/01/2005, 10:10
Preparation of Restart in 2005-2006
The “basic-period” is the underlying time unit for the operation of the accelerators
in the sense that all machine cycles are integer multiples of that unit. The
motivation for reducing the basic period from the present 1200 ms to 900 ms and the
choice of this “optimum” length are explained. The impact on the operation of the
accelerator complex is discussed and an overview of the...
Bertrand Frammery
(CERN)
14/01/2005, 10:50
Preparation of Restart in 2005-2006
From 2006 onwards, LHC studies, CNGS and other fixed target physics
programs will
compete for beam. Besides, the timing equipment currently driving
the SPS cycling is
not compatible with PS Complex and with the future LHC cycling
flexibility.
Multicycling the SPS is a solution for both problems (together with
speeding up the
basic cycling period to 0.9s) and a firm decision...
Mr
Bruno Puccio
(CERN)
14/01/2005, 11:20
Preparation of Restart in 2005-2006
In the LHC and CNGS era, the beam energy of the SPS will be largely above
damage limit. Comparing to the current SPS exploitation, fast extractions into
several channels of higher intensity and brighter beams are very challenging.
In order to optimize the operation efficiency, a “flexible” but reliable Interlock
system operating in multi-cycling mode is required. Ideas for such system,...
Dr
Thomas Otto
(CERN SC-RP)
14/01/2005, 11:40
Preparation of Restart in 2005-2006
The CNGS target will receive up to 4.5E19 protons in one year. To achieve
this goal,approximately 1.3E19 protons will be lost in the PS, 50 % during
acceleration and 50% during multiturn extraction. This contribution analyses
the radiological consequences of the increased beam losses. It is focussed
on two main issues:
1.) Radiation leaking through the weak points of the PS shielding...
Doris Forkel-Wirth
(CERN-SC)
14/01/2005, 11:55
Preparation of Restart in 2005-2006
From 2006 onwards the total number of protons per year accelerated by the
SPS machine and provided to its fixed target program, CNGS and LHC will
exceed by far all what has been achieved in the past. The consequences with
respect to radiation protection issues will become serious. Additional thick
shielding will be required in the caverns of SPS Point 4 and Point 5 if ECA4
and ECA5...
Mr
Peter Sollander
(CERN AB/OP)
14/01/2005, 12:20
Preparation of Restart in 2005-2006
The operation of CERN's Technical Infrastructure will move from the TCR to the MCR
on February 1st 2005. AB will take the responsibility for monitoring all technical
services including electricity supply, cooling&ventilation, computers&networks and
various access and safety systems, co-ordinating minor and major interventions of
all equipment specialists and provide this service 365...
Dr
Simon Baird
(AB/OP)
14/01/2005, 12:40
Preparation of Restart in 2005-2006
The restart of all accelerator operation in 2006 is foreseen to take
place from the
CERN Control Centre (CCC), currently being built adjacent to what
used to be the
PCR. The status of this project will be summarized, covering the
building, the
control room layout and the staff who will work there. The overall
schedule will be
presented, and some particular issues for the 2006...
