1. CLIC Study Aim Conceptual design report in 2010
Proof that all components and their interplay are conceptually understood
Quantify expected overall performance and related component requirements
Scientific case
Proof of feasibility issues and cost estimation
Evolution path to TDR

2. ATF2 Plans Participation in ATF2 commissioning
Provision of simulation of ATF2
Tuning studies for ATF2
Push for smallest possible beta-functions
Difficulty scales as y/L*
y=0.09mm, L*=3.5m for CLIC at 3TeV
y=0.05mm, L*=1m for pushed ATF2
Betafunction may be larger in CLIC AT 500GeV
Plan to have a PhD student with Rogelio et al. to work on these topics

3. Lattice Design Order of energy and betatron collimation
Collimation efficiency
Machine protection
Different energies
Energy scans (10%) are difficult with permanent final quadrupole
Luminosity runs at energies different from nominal
Calibration runs
Crossing angle is settled for now but review
Long L*
Easier for push-pull and magnet stabilisation
But cost in luminosity
Impact of polarisation
Lines for polarisation measurement
Optimisation of all existing beam lines
500GeV design(s)
Evaluation of luminosity, collimation efficiency and beam loss

4. Performance Studies Static imperfections
80% of the machines achieve more than 80% of the luminosity
Improvement needed
A working group exists to address stabilisation hardware
Final doublet stabilisation is essential
Tolerance depends on support design, wish for 0.1nm stability at 4Hz
Currently quadrupole is integrated into detector
Difficult support design
Orbit feedback in BDS is important
Design of system
Study of performance
Tuning feedback needs to be studied
Integrated studies
Main linac RF jitter dominated by BDS bandwidth

5. MDI CLIC physics working group at CERN started being active
We are providing luminosity spectra and background data
Operation scenarios
Luminosity spectrum reconstruction
Forward region studies
Detector design
Started dedicated working group on MDI at CERN (conveners E. Tsemelis, D.S.)
Technical design of push-pull
Design of final quadrupole
Integration of quadrupole stabilisation in detector
Impact of detector solenoid
Integration of intra-pulse feedback
Mask design

6. Hardware Components Collimators
Crab cavity design and phase stability (Cockcroft)
Intra-pulse interaction point feedback
Any improvement buys luminosity
Integration into detector is important
Final quadrupole design
Solenoid design
Likely need compensating solenoids to shield final quadrupoles
Mask design etc.
Stabilisation system
Working group exists on this topic
Beam dumps

7. CLIC Chart

8. CLIC Chart