Difference: FJPPLAccelerateurRD (3 vs. 4)
Revision 42015-07-15 - Main.PhilipBambade
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| < < | SuperKEKB e+e- collider is designed to provide a very high luminosity for Belle-II experiment, using nano-beam scheme. In this context, the fast luminosity monitoring collaboration aims to develop a reliable instrumentation to measure the luminosity and provide fast input for luminosity feedback corrections as well as for luminosity optimization phase. The measurements are based on the detection of the electron or positron arising from the Bhabha scattering process at zero degree photon angle, which offers a significant amount of signal. The fast luminosity monitoring system will be set at few meters downstream the interaction point, ideally both in the High and Low energy rings, just immediately outside the beam-pipe. Several kind of detectors are under development, combining thus complementary technologies, namely scintillator, Cerenkov counter and diamond sensor, all requiring fast readout electronics enabling both the measurements of the whole-ring averaged luminosity and the bunch by bunch luminosity. | |||||||
| > > | SuperKEKB e+e- collider is designed to provide a very high luminosity for Belle-II experiment, using nano-beam scheme. In this context, the fast luminosity monitoring collaboration aims to develop a reliable instrumentation to measure the luminosity and provide fast input for luminosity feedback corrections as well as for luminosity optimization phase. The measurements are based on the detection of the electron or positron arising from the Bhabha scattering process at zero degree photon angle, which offers a significant amount of signal. The fast luminosity monitoring system will be set ten to thirty meters downstream of the interaction point, ideally both in the High and Low energy rings, just immediately outside the beam-pipe. Several kind of detectors are under development, combining thus complementary technologies, namely scintillator, Cerenkov counter and diamond sensor, all requiring fast readout electronics enabling both the measurements of the whole-ring averaged luminosity and the bunch by bunch luminosity. | |||||||
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French members : P. Bambade, F. Bogard, D. Jehanno, V. Kubytskyi, C. Rimbault | ||||||||
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| S. Uehara, Y. Funakoshi, M. Iwasaki
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| < < | D. El Khechen, C. Rimbault, P. Bambade, “Fast Luminosity Monitoring using diamond sensors for the Super Flavour Factories SuperKEKB ”, proceeding for the 5th International Particle Accelerator Conference (IPAC2014), Dresden, Germany, 15-20 June 2014. | |||||||
| > > | [1] D. El Khechen, C. Rimbault, P. Bambade, “Fast Luminosity Monitoring using diamond sensors for the Super Flavour Factories SuperKEKB”, proceeding for the 5th International Particle Accelerator Conference (IPAC2014), Dresden, Germany, 15-20 June 2014. | |||||||
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| < < | website : | |||||||
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| http://belle2.kek.jp/
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| References : [1] K. Nii et al., “Vertical Electro-polishing of Nb single-cell cavity using cathode with variable-geometry wings and its results of vertical test”, LINAC 2014, MOPP108. | ||||||||
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| < < | website | |||||||
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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.
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| < < | A. Jeremie, P. Bambade, F. Bogard, P. Cornebise, N. Geffroy, H. Guler, V. Kubytskyi, S. Wallon | |||||||
| > > | A. Jeremie, B. Aimard, P. Bambade, F. Bogard, L. Brunetti, P. Cornebise, H. Guler, V. Kubytskyi, S. Wallon, T. Yldizkaya | |||||||
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Japanese members : N. Terunuma, S. Araki, K. Kubo, S. Kuroda, T. Naito, T. Okugi, T. Tauchi 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. [2] 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. [3] ATF2 PROPOSAL. VOL. 2. B.I. Grishanov et al., DESY-06-001, CERN-AB-2006-004, ILC-ASIA-2005-26, JAI-2006-001, KEK-REPORT-2005-9, SLAC-R-796, UT-ICEPP-05-04. | |||||||
| > > | [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) [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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| < < | website : http://lcdev.kek.jp/ATF2/ | |||||||
| > > | Website : http://lcdev.kek.jp/ATF2/ | |||||||
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