| Paper |
Title |
Page |
| TUPLT087 |
Deflection Element for S-LSR
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1357 |
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- M. Ikegami, H. Fadil, A. Noda, T. Shirai, M. Tanabe, H. Tongu
Kyoto ICR, Uji, Kyoto
- T. Fujimoto, K. Noda, H. Ogawa, S. Shibuya, T. Takeuchi
NIRS, Chiba-shi
- M. Grieser
MPI-K, Heidelberg
- H. Okamoto
HU/AdSM, Higashi-Hiroshima
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Main lattice of the ion storage and cooler ring, S-LSR is composed of 6 dipole and 12 quadrupole magnets. The maximum magnetic field, the radius of curvature and gap height are 0.95 T, 1050 mm and 70 mm, respectively. The field measurement of the dipole magnets has been completed with use of Hall-probe position controlled by driving mechanism composed of stepping motors and ball-screws. In order to cancel out the momentum dispersion, the radial electric field is superposed with the magnetic field. The radial electric field is applied by the electrodes installed into the vacuum vessel set inside the rather limited gap of the dipole magnet. Good field quality is to be realized with use of intermediate electrodes. In the present paper, the results of the magnetic field measurements are presented together with the design of the superposed electric field.
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| TUPLT088 |
Beam Cooling at S-LSR
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1360 |
| |
- A. Noda, H. Fadil, S. Fujimoto, M. Ikegami, T. Shirai, M. Tanabe, H. Tongu
Kyoto ICR, Uji, Kyoto
- M. Grieser
MPI-K, Heidelberg
- I.N. Meshkov, E. Syresin
JINR, Dubna, Moscow Region
- K. Noda, T. Takeuchi
NIRS, Chiba-shi
- H. Okamoto, Y. Yuri
HU/AdSM, Higashi-Hiroshima
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S-LSR is an ion accumulation and cooler ring with the circumference and maximum magnetic rigidity of 22.589 m and 1.0T.m, respectively. Electron beam cooling will be applied for laser-produced hot ion beam after phase rotation. Electron cooler for S-LSR is now under construction and the beam simulation is also going on. Laser cooling of Mg ion with low energy (35 keV) is also planned in 3-dimensional way with use of Synchro-Betatron coupling.so as to realize ultra cold beam. Cancellation of shear force due to orbit-length difference in the dipole section is to be studied with use of overlapping of the radial electric field inversely proportional to the curvature radius with the uniform vertical magnetic field. Possible experiments to approach to ultra-cold beam is also to be studied by computer simulation
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| WEPKF040 |
Magnetic Field Measurement of Quadrupole Magnets for S-LSR
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1693 |
| |
- T. Takeuchi, K. Noda, S. Shibuya
NIRS, Chiba-shi
- H. Fadil, M. Ikegami, A. Noda, T. Shirai, H. Tongu
Kyoto ICR, Uji, Kyoto
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S-LSR is a low energy ion storage/cooler ring. It has 12-quadrupole magnets (QM) with a bore radius of 70 mm and a maximum field gradient of 5 T/m. To suppress and control a magnetic flux in a fringing field of a bending magnet (BM), a field clamp with a thickness of 25 mm was installed in between BM and QM. The distance between the field clamp and QM is 80 mm. 3D calculation represented that the QM field is strongly influenced by the field clamp. Therefore, QMs were designed and optimized in considering the influence of the field clamp. Magnetic field measurements were performed by means of a Hall probe and a long search coil. A magnet field measurement by a Hall probe was carried out together with the field clamp and BM for S-LSR. For 12-quadrupole magnets, the measurement by the long search coil which moves in horizontal direction was carried out. The results for each measurements will be discussed.
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| WEPLT116 |
Lattice Design and Cooling Simulation at S-LSR
|
2119 |
| |
- T. Shirai, H. Fadil, S. Fujimoto, M. Ikegami, A. Noda, M. Tanabe, H. Tongu
Kyoto ICR, Uji, Kyoto
- T. Fujimoto, H. Fujiwara, K. Noda, S. Shibuya, T. Takeuchi
NIRS, Chiba-shi
- M. Grieser
MPI-K, Heidelberg
- H. Okamoto, Y. Yuri
HU/AdSM, Higashi-Hiroshima
- E. Syresin
JINR, Dubna, Moscow Region
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A compact ion cooler ring, S-LSR is under construction in Kyoto University. The circumference is 22.557 m and the maximum magnetic rigidity is 1 Tm. One of the important roles of S-LSR is a test bed to examine the lowest temperature limit of the ion beams using cooling techniques. The ultimate case is a crystalline one. The ring optics of S-LSR has a high super periodicity and a low phase advance to reduce the beam heating from the lattice structure. S-LSR has an electron beam cooling device and a laser cooling system for Mg. The simulation results show the possible limit of the ion beam temperature and the dependence on the operating betatron tunes.
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