Difference: FJPPLAccelerateurRD (8 vs. 9)
Revision 92016-09-01 - Main.GenevieveGilbert
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| < < | As a demonstrator for Future Linear Colliders (LC) with nanometer (nm) size e+-e- beams, ATF2 (Accelerator Test Facility) has achieved 44nm vertical beam size, very near to its 37nm goal. It is realized under low intensity beam and the studies on beam intensity dependence will continue. Next major step for our French and Japanese Teams is maintaining the beam position stability of 2nm at IP. To achieve this, Beam Position Monitors, used with an efficient upstream feedback, will be installed and calibrated in a vacuum chamber with internal moving mechanisms. Ground Motion (GM) sensors will be tested for the development of a new GM feedforward acting on the beam stability. Additional Beam Instrumentation like an in-vacuum diamond sensor for beam halo and linear Compton scattering measurements will be developed. This project is an ideal precision study for the training of students. | |||||||
| > > | As a demonstrator for Future Linear Colliders (LC) with nanometer (nm) size e+-e- beams, ATF2 (Accelerator Test Facility) has
As a demonstrator for Future Linear Colliders (LC) with nanometer (nm) size e+-e- beams, ATF2 (Accelerator Test Facility) has achieved 44nm vertical beam size, very near to its 37nm goal. It is realized under low intensity beam and the studies on beam intensity dependence will continue. Next major step for our French and Japanese Teams is maintaining the beam position stability of 2nm at IP. To achieve this, numerous studies on Beam Position Monitors in a vacuum chamber with internal moving mechanisms were done. Two diamond strip sensor based scanners were installed for horizontal and vertical beam halo studies together with dedicated collimators. Clear cuts in the halo from upstream apertures were identified. Ground Motion sensors are being used for vibration source identification and for the development of a new Ground Motion feedforward acting on the beam stability. In addition, improvement of the QF1FF Final Focus magnet support was done. This programme is an ideal precision study for the training of students. | |||||||
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French members : A. Jeremie, B. Aimard, P. Bambade, F. Bogard, L. Brunetti, P. Cornebise, H. Guler, V. Kubytskyi, S. Wallon, T. Yldizkaya | ||||||||
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| [4] D. Wang et al., Analytical Estimate of ATF Beam Halo Distribution, Chinese Physics C 2014 Vol. 38(12): 127003 [5] Y. Renier et al., Trajectory measurements and correlations in the final focus beam line at the KEK Accelerator Test Facility, Physical Review Special Topics - Accelerators and Beams 16, 062803 (2013) [6] Bambade P. et al., Present status and first results of the final focus beam line at the KEK Accelerator Test Facility, Phys. Rev. ST Accel. Beams 13, (2010) 042801. | ||||||||
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| > > | [7] D. Bett et al., GROUND MOTION COMPENSATION USING FEED-FORWARD CONTROL AT ATF2, WEPOR005, 7th International Particle Accelerator Conference (IPAC 2016), Busan, Korea, 8-13 May, 2016 | |||||||
| Website : http://lcdev.kek.jp/ATF2/ | ||||||||
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