| Paper |
Title |
Page |
| WEOCC01 |
Experimental Approach to Ultra-Cold Ion Beam at S-LSR
|
2035 |
| |
- A. Noda
- H. Fadil, M. Grieser
MPI-K, Heidelberg
- M. Ikegami, T. Ishikawa, M. Nakao, T. Shirai, H. Souda, M. Tanabe, H. Tongu
Kyoto ICR, Uji, Kyoto
- I. N. Meshkov, A. V. Smirnov
JINR, Dubna, Moscow Region
- K. Noda
NIRS, Chiba-shi
|
|
| |
Funding: The present work was supported from Advanced Compact Accelerator project by MEXT, Japan. Support from the 21COE at Kyoto University-Diversity and Universality in Physics- is also greatly appreciated.
S-LSR is a storage and cooler ring with the circumference of 22.56 m applied for an electron beam cooling of 7 MeV proton beam and laser cooling of 24Mg+ beam with 35 keV. From the measurement with the use of Schottky pich-up of the momentum spread of 7 MeV proton beam reducing the particle number to suppress the effect of intra-beam scattering,abrupt jump in fractional momentum spread and Schottky power has been observed, which is considered the 1 dimensional phase transition to the ordered state*. The situation has also been expected from numerical simulation**. Laser cooling with much stronger cooling force is expected to realize 2Dand 3D crystalline states if the maintenance condition can be satisfied. Experimental approaches to realize such a condition at S-LSR as dispersion free lattice and "tapered cooling" are also decribed in the present paper.
* A Noda, et al., , New Journal of Physics, 8 (2006)288.** A. Smirnov et al., Beam Science and Technology, 10 (2006) 6*** J. Wei, X-P, Li and A. M. Sessler, , Phys. Rev. Lett. 73 (1994) 3089.
|
|
|
Slides
|
|
| WEOCC02 |
Overview of warm-dense-matter experiments with intense heavy ion beams at GSI-Darmstadt
|
2038 |
| |
- P. N. Ni
- J. J. Barnard
LLNL, Livermore, California
- F. M. Bieniosek, M. Leitner, B. G. Logan, R. More, P. K. Roy
LBNL, Berkeley, California
- A. Fernengel, A. Menzel
TU Darmstadt, Darmstadt
- A. Fertman, A. Golubev, B. Y. Sharkov, I. Turtikov
ITEP, Moscow
- D. Hoffmann, A. Hug, N. A. Tahir, A. Udrea, D. Varentsov
GSI, Darmstadt
- M. Kulish, D. Nikolaev, A. Ternovoy
IPCP, Chernogolovka, Moscow region
|
|
| |
Recently, a series of high energy density (HED) physics experiments with heavy ion beams have been carried out at the GSI heavy ion accelerator. The ion beam spot of heating uranium beam size of about 1 mm, pulse length about 120 ns and intensity 109 particles/bunch. In these experiments, metallic solid and porous targets of macroscopic volumes were heated by intense heavy ion beams uniformly and quasi-isochorically, and temperature, pressure and expansion velocity were measured during the heating and cooling of the sample using a fast multi-channel radiation pyrometer, laser Doppler interferometer (VISAR), Michelson displacement interferometer and streak-camera-based-backlighting system. In the performed experiments target temperatures varying from 1'000 K to 12'000 K and pressure in kbar range were measured. Expansion velocities up to 2600 m/s have been registered for lead and up to 1700 m/s for tungsten targets.
|
|
|
|
Slides
|
|
| WEOCC03 |
Halo Estimates and Simulations for Linear Colliders
|
2041 |
| |
- H. Burkhardt
- I. V. Agapov, G. A. Blair
Royal Holloway, University of London, Surrey
- F. Jackson
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- A. Latina, L. Neukermans, D. Schulte
CERN, Geneva
|
|
| |
Funding: This work is supported by the Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area", contract number RIDS-011899.
Halo simulations and estimates are important for the design of future linear accelerators. We present simulations performed for the ILC and CLIC and compare these with semi-analytical estimates and other simulations.
|
|
|
|
Slides
|
|
| WEOCC04 |
Recent Progress on the Diamond Amplified Photo-cathode Experiment
|
2044 |
| |
- X. Chang
- I. Ben-Zvi, A. Burrill, J. G. Grimes, T. Rao, Z. Segalov, J. Smedley
BNL, Upton, Long Island, New York
- Q. Wu
IUCF, Bloomington, Indiana
|
|
| |
We report recent progress on the Diamond Amplified Photo-cathode (DAP). The use of a pulsed electron gun provides detailed information about the DAP physics. The secondary electron gain has been measured under various electric fields. We have achieved gains of a few hundred in the transmission mode and observed evidence of emission of electrons from the surface. A model based on recombination of electrons and holes during generation well describes the field dependence of the gain. The emittance measurement system for the DAP has been designed, constructed and is ready for use. The capsule design of the DAP is also being studied in parallel.
|
|
|
|
Slides
|
|