1 atf2 tuning and its application to ilc and clic ffs/ir region astec and man : working together on...
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ATF2 Tuning and its application to ILC and CLIC FFS/IR region
• ASTeC and MAN : working together on tuning methods for the ATF2 and ILC IR/extraction design
• The aim is to test the developed tuning procedures experimentally at ATF2
• Based on the knowledge gained at ATF2, provide an important feedback to the ILC and CLIC final focus/IR tuning methods.
• Use presently developed simulation tools to provide optics and beam halo tracking input for the background studies.
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Emittance Tuning Simulations• Developed a robust integrated simulation environment for analysis of various
methods of beam tuning simulations.
• Simulation structure works for both ILC and ATF2 with minimal changes.
• Investigated traditional and more novel methods of beam tuning on ILC and ATF2.
• Analysis shows viable methods can be created to remove the emittance dilution effects as seen at the IP, using only the final 5 sextupole magnets.
• Performed further investigations into the linearity of such tuning knobs, and the limits with position and field errors on the tuning magnets.
• Performed tolerance studies on both the ILC and ATF2 including the effects of trajectory correction.
J. Jones, A. Scarfe
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BDS Collimation Optics Design
• Lattice optimisation demonstrates significant improvement in collimation efficiency
• Collimation depths for different detector concepts, different L* covering all the parameter ranges of the ILC
Collimated halo before optimisation
Collimated halo after optimisation
F. Jackson
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The number of particles inside the laser spot ±100 µm is 44% of its number at IP
y offset (600 µm) y’ offset (12 µrad).The number of particles inside the laser spot ±100 µm is 0.1% of its number at IP.
Without detector field
With detector field
14 mrad baseline extraction optics
• To compensate the detector effect and to increase the number of particles inside the laser spot size.
• Include anti-solenoid, anti-DID (for different detector concepts)
• Include magnetic and beam errors to study the diagnostics performance and effect on beam losses at collimators
D.Toprek, R. Appleby
Beam at second focus
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Deliverables
• Participation in commissioning of ATF2 final focus system to test final focus optics design
• Application of various tuning procedures and tuning knobs
• Based on the feedback at ATF2, make necessary changes in the ILC/CLIC BDS final focus and interaction region design. These studies will include the detector solenoid field, anti-solenoid and anti-DID for realistic machine and beam errors.
• Studies of machine induced backgrounds arising from beam transport in the extraction line utilizing simulation tools developed for the ILC.
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FP7 Contribution + Request
MAN contribution is:
12 PM R. Appleby - Faculty member – guaranteed
36 PM RA post – requires approval by lab. Negotiations in progress
12 PM – FP7 request
ASTEC contribution is: requires approval by lab
12 PM J. Jones – STFC permanent staff
3 PM F. Jackson – STFC permanent staff
3 PM D. Angal-Kalinin- STFC permanent staff
12 PM – FP7 request
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Resources (MAN)
Material [€] Integrated human resources
direct [€] Indirect [€] [FTE·months] direct [€] indirect [€]
Lab contribution (a) 0 0 48 268608 163648
Requested (b) 0 0 12 67152 40912
Total (a+b) 0 60 335760 204560
Resources (ASTEC)
Material [€] Integrated human resources
direct [€] Indirect [€] [FTE·months] direct [€] indirect [€]
Lab contribution (a) 0 0 18 105000 110250
Requested (b) 0 0 12 70000 73500
Total (a+b) 0 0 30 175000 183750
Travel request: 5k€ per year