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Title: One-Dimensional Beam Ordering of Protons in a Storage Ring

Abstract

The ordering of protons has been observed at a new storage ring, S-LSR, at Kyoto University. Abrupt jumps in the momentum spread and the Schottky noise power were observed for protons for the first time at a particle number of {approx}2000, upon applying electron cooling with electron currents of 25, 50, and 100 mA. The transition temperature was 0.17 and 1 meV in the longitudinal and transverse directions, respectively. The transverse temperature of the proton beam was much below that of electrons at the transition, which played an essential role in the ordering of protons.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1];  [2];  [2];  [3];  [4]
  1. Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
  2. (Japan)
  3. (Russian Federation)
  4. (Germany)
Publication Date:
OSTI Identifier:
20951375
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 20; Other Information: DOI: 10.1103/PhysRevLett.98.204801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRON COOLING; ELECTRONS; ONE-DIMENSIONAL CALCULATIONS; PROTON BEAMS; PROTONS; STORAGE RINGS; TRANSITION TEMPERATURE

Citation Formats

Shirai, T., Ikegami, M., Fujimoto, S., Souda, H., Tanabe, M., Tongu, H., Noda, A., Noda, K., Fujimoto, T., Iwata, S., Shibuya, S., Smirnov, A., Meshkov, I., Fadil, H., Grieser, M., National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Accelerator Engineering Corporation, 4-9-1 Anagawa, Inage, Chiba 263-8555, Joint Institute for Nuclear Research, Joliot Curie 6, Dubna 141980, and Max-Planck-Institut fuer Kernphysik, D-69029 Heidelberg. One-Dimensional Beam Ordering of Protons in a Storage Ring. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.204801.
Shirai, T., Ikegami, M., Fujimoto, S., Souda, H., Tanabe, M., Tongu, H., Noda, A., Noda, K., Fujimoto, T., Iwata, S., Shibuya, S., Smirnov, A., Meshkov, I., Fadil, H., Grieser, M., National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Accelerator Engineering Corporation, 4-9-1 Anagawa, Inage, Chiba 263-8555, Joint Institute for Nuclear Research, Joliot Curie 6, Dubna 141980, & Max-Planck-Institut fuer Kernphysik, D-69029 Heidelberg. One-Dimensional Beam Ordering of Protons in a Storage Ring. United States. doi:10.1103/PHYSREVLETT.98.204801.
Shirai, T., Ikegami, M., Fujimoto, S., Souda, H., Tanabe, M., Tongu, H., Noda, A., Noda, K., Fujimoto, T., Iwata, S., Shibuya, S., Smirnov, A., Meshkov, I., Fadil, H., Grieser, M., National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Accelerator Engineering Corporation, 4-9-1 Anagawa, Inage, Chiba 263-8555, Joint Institute for Nuclear Research, Joliot Curie 6, Dubna 141980, and Max-Planck-Institut fuer Kernphysik, D-69029 Heidelberg. Fri . "One-Dimensional Beam Ordering of Protons in a Storage Ring". United States. doi:10.1103/PHYSREVLETT.98.204801.
@article{osti_20951375,
title = {One-Dimensional Beam Ordering of Protons in a Storage Ring},
author = {Shirai, T. and Ikegami, M. and Fujimoto, S. and Souda, H. and Tanabe, M. and Tongu, H. and Noda, A. and Noda, K. and Fujimoto, T. and Iwata, S. and Shibuya, S. and Smirnov, A. and Meshkov, I. and Fadil, H. and Grieser, M. and National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555 and Accelerator Engineering Corporation, 4-9-1 Anagawa, Inage, Chiba 263-8555 and Joint Institute for Nuclear Research, Joliot Curie 6, Dubna 141980 and Max-Planck-Institut fuer Kernphysik, D-69029 Heidelberg},
abstractNote = {The ordering of protons has been observed at a new storage ring, S-LSR, at Kyoto University. Abrupt jumps in the momentum spread and the Schottky noise power were observed for protons for the first time at a particle number of {approx}2000, upon applying electron cooling with electron currents of 25, 50, and 100 mA. The transition temperature was 0.17 and 1 meV in the longitudinal and transverse directions, respectively. The transverse temperature of the proton beam was much below that of electrons at the transition, which played an essential role in the ordering of protons.},
doi = {10.1103/PHYSREVLETT.98.204801},
journal = {Physical Review Letters},
number = 20,
volume = 98,
place = {United States},
year = {Fri May 18 00:00:00 EDT 2007},
month = {Fri May 18 00:00:00 EDT 2007}
}
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  • A numerical simulation of a free electron laser oscillator-storage ring system is presented. The model describes the evolution of the system toward a steady state and gives information on the changes of the laser power and of the electron and photon pulse shape during the transient. The steady-state laser power output and electron beam properties are compared with the existing theoretical model.
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  • The far-infrared spectra of phthalan showing bands resulting from the ring-puckering and ring-flapping vibrations have been recorded and analyzed. The observation and assignment of the puckering fundamental at 30.9cm{sup {minus}1} and of numerous hot-band, double quantum jump, and triple quantum jump transitions have provided the basis for generating a detailed and self-consistent energy map for the vibrational states. In addition, sum, difference, and hot bands associated with the C{endash}O symmetric stretching mode also provide confirmation of the assignments. Previous far-infrared, electronic, and dispersed fluorescence spectra assignments are shown to be erroneous whereas a previous microwave study is consistent with themore » present results. The ring-puckering energy spacings show considerable irregularities and these can be ascribed to the puckering/flapping interaction. Consequently, a one-dimensional potential energy function can only do a mediocre job of fitting the observed vibrational data. {copyright} {ital 1998 American Institute of Physics.}« less