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Title |
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| WG112 |
Proposal of a Synchrotron Radiation Facility to Supply Ultraviolet Light, X-Ray, MeV-photon, GeV-photon and Neutron
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24 |
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- Y. Kawashima
JASRI/SPring-8, Hyogo-ken
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This is a proposal of new facility, which consists of 1 GeV-linac, booster synchrotron and storage ring. The synchrotron accelerates electron beam from 1 GeV to 10 GeV. The storage ring stores the beam at arbitrary energy from 1 GeV to 10 GeV and top-up operation is carried out at any stored beam energy. The stored beam current depends on the beam energy. In the energy region of 8 GeV to 10 GeV, maximum beam current is around 100mA. Under the energy of 4 GeV, the targeted maximum current is 1 A. The storage ring supplies ultraviolet light, MeV-photon, GeV-photon and neutron for solid-state physics, biology, protein structure analysis, drug development and particle physics. The main feature of the facility is to be able to supply the monoenergetic MeV-photon and neutron. With CO2 laser and stored electron beam, monoenergetic MeV-photons are produced through the inverse Compton process. To obtain the target monoenergetic MeV-photon, the wavelength of the laser is constant; on the other hand stored beam energy is changed. Using a superconducting wiggler, a lot of MeV photons are radiated from the wiggler. With the radiated MeV-photon and beryllium target, neutrons are produced.
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| WG422 |
Proposal of a Photocathode Impulse-Gun and Followed by Impulse Accelerating Structures to Produce Low Emittance Electron Beam
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45 |
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- Y. Kawashima
JASRI/SPring-8, Hyogo-ken
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The photocathode impulse-gun must be one of the best methods to produce low emittance electron beam for FEL. To raise the beam energy up to around 10 MeV, RF cavity will be used. However, there is drift space between the photocathode impulse-gun and RF cavity. The beam emittace will get worse due to space charge effect in passing through the drift space. Thus the drift space should be as shorter as possible. Minimizing the space charge effect is essential for the early stage of beam acceleration at an electron beam source and a following pre-acceleration. Mechanically unavoidable drift space degrades the beam emittance drastically. We propose a combined structure of a photocathode impulse-gun followed by an impulse accelerator.
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Slides
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