Difference: FJPPLAccelerateurRD (12 vs. 13)
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| < < | 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. | |||||||
| > > | As a demonstrator for Future Linear Colliders (FLC) 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 a vertical dedicated collimator. 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 has to be done. These studies will be of paramount importance for the preparation of the ILC, in this context the French team was invited to join a new KEK-based study group charged with re-optimizing ILC IP/BDS/DR parameters for a staged ILC project starting with a 250 GeV centre-of-mass energy. This program is the ideal framework for the training of students in the Accelerators Physics field.l | |||||||
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French members : | ||||||||
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| < < | A. Faus-Golfe, P. Bambade, F. Bogard, L. Brunetti, P. Cornebise, A. Jeremie, S. Wallon, | |||||||
| > > | A. Faus-Golfe, P. Bambade, F. Bogard, L. Brunetti, P. Cornebise, A. Jeremie, S. Wallon, R. Yang | |||||||
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Japanese members : K. Kubo, S. Araki, S. Kuroda, Y. Morikawa, T. Naito, T. Okugi, T. Tauchi, N. Terunuma References : | ||||||||
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| < < | [1] G.White et al., Experimental Validation of a Novel Compact Focusing Scheme for Future Energy-Frontier Linear Lepton Colliders, Phys. Rev. Lett. 112 (2014) 034802. | |||||||
| > > | [1] G.White et al., Experimental Validation of a Novel Compact Focusing Scheme for Future Energy-Frontier Linear Lepton Colliders, Phys. Rev. Lett. 112 (2014) 034802 | |||||||
| [2] T. Okugi et al., Linear and second order optics corrections for the KEK Accelerator Test Facility final focus beam line, Physical Review Special Topics - Accelerators and Beams 17, 023501 (2014) [3] E. Marin et al., Design and high order optimization of the Accelerator Test Facility lattices, Physical Review Special Topics - Accelerators and Beams 17, 021002 (2014) [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) | ||||||||
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| < < | [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. [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 | |||||||
| > > | [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 [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 [8] Nuria Fuster-Martinez et al., ATF2 Beam Halo Collimation Background and Wakefield Measurements in 2016 Runs, IPAC 2017 [9] Renjun Yang et al., Measurements of Transverse Beam Tails in the Accelerator Test Facility 2 of KEK, IPAC 2017 [10] Renjun Yang et al., Theoretical Study of Beam Tail Formation in the Accelerator Test Facility of KEK, IPAC2017 | |||||||
| Website : http://lcdev.kek.jp/ATF2/ | ||||||||
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