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The Art and Science of Planning
for the
International Linear Collider
Barry Barish
Caltech
CERN Colloquium
13-Nov-07
Possible TeV Scale Lepton Colliders
ILC < 1 TeV
Technically possible
~ 2019
ILC
QUAD
QUAD
POWER EXTRACTION
STRUCTURE
Drive beam - 95 A, 300 ns
from 2.4 GeV to 240 MeV
CLIC
ACCELERATING
STRUCTURES
Main beam – 1 A, 200 ns
from 9 GeV to 1.5 TeV
Much R&D Needed
• Neutrino Factory R&D +
• bunch merging
• much more cooling
• etc
BPM
Muon Collider
CLIC < 3 TeV
Feasibility?
ILC + 5-10 yrs
Muon Collider
< 4 TeV
FEASIBILITY??
ILC + 15 yrs?
ILC – Global Design Phase
2005
2006
2007
2008
2010
CLIC
2009
Global Design Effort
Baseline configuration
Reference Design
Project
LHC
Physics
Engineering Design
ILC R&D
Program
Expression of
Interest to Host
International
Management
Example: Beam
Delivery EDR +
‘Deliverables’
Overall tentative schedule to
get general idea. Detailed (and
more accurate) tables for
several systems will be shown
ILC Reference Design
– 11km SC linacs operating at 31.5 MV/m for 500 GeV
– Centralized injector
• Circular damping rings for electrons and positrons
• Undulator-based positron source
– Single IR with 14 mrad crossing angle
– Dual tunnel configuration for safety and availability
Reference Design – Feb 2007
Documented in Reference Design Report
RDR Design Parameters
Max. Center-of-mass energy
Peak Luminosity
500
~2x1034
GeV
1/cm2s
Beam Current
9.0
mA
Repetition rate
5
Hz
Average accelerating gradient
31.5
MV/m
Beam pulse length
0.95
ms
31
km
~230
MW
Total Site Length
Total AC Power Consumption
•
•
Science 11 January 2008:
Vol. 319. no. 5860, p. 142
DOI: 10.1126/science.319.5860.142
News of the Week
•
PARTICLE PHYSICS:
Budget Cuts Mean Layoffs at Two DOE Labs, End for
SLAC Collider
•
Adrian Cho
•
An unexpectedly tight science budget this year at the
U.S. Department of Energy (DOE) will shut down a
particle collider in California and curtail activities at
another accelerator lab in Illinois. In addition, up to 325
scientists, technicians, and workers are facing layoffs.
•
•
Published online 9 January 2008 | Nature 451, 112-113 (2008) | doi:10.1038/451112a
News
• Accelerator plans stalled after US and UK cuts
• Budget woes spell trouble for International
Linear Collider.
•
The machine on which the world's particle physicists have staked the
future of their discipline hangs in the balance owing to budget cuts.
•
On 18 December, the US Congress passed a spending bill
slashing funding for the International Linear Collider (ILC), a
31-kilometre machine to collide electrons with positrons, by
three-quarters to just $15 million in 2008, money that has
already been spent.
MAIS
•
•
Editorial
Nature 451, 108 (10 January 2008) | doi:10.1038/451108a; Published online 9 January 2008
• Don't panic
• Whether to build the International Linear Collider is an open
question, but R&D on it should be supported.
•
Big science has taken a hit in recent budget cuts both in the
United States, where significant lay-offs at Fermilab in Batavia,
Illinois, are now threatened, and in the United Kingdom, which is
to chop tens of millions of pounds over the next few years from
astronomy and high-energy physics (HEP) budgets. In both cases,
one significant casualty has been participation in the development
of the International Linear Collider (ILC; see page 112), the
envisaged successor to CERN's Large Hadron Collider (LHC). The
latter has suffered delays; and is not likely to see its first useful
collisions until 2009. Time to take stock.
Réunion avec Troïka GDE-EDR
• GDE et Barry Barish sont en train de se réunir à
DESY pour organiser la “résistance”
• Mot d’ordre:
• On maintient les échéances EDR et ATF2 même si
le EDR risque d’être moins épais et ATF2 peut
démarrer avec quelques éléments en moins.
• Le groupe LAViSta en sera très peu affecté car les
aimants FD de ATF2 sont à l’heure et nous
faisons surtout de la stabilisation aux spécifs
CLIC.