Development of a compact high brightness X-ray source

Chen, J.; Imasaki, K.; Fujita, Masayuki; Yamanaka, Chiyoe; Asakawa, M.; Nakai, S.; Asakuma, T.

doi:10.1016/0168-9002(94)90379-4

Cited by 36 publications

(14 citation statements)

References 18 publications

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“…Bremsstrahlung gamma rays are usually used to induce a photonuclear reaction (,n); however, the poor coupling between the bremsstrahlung gamma rays and the giant resonance of nuclei is inevitable, since the energy spectrum of bremsstrahlung photons is very wide. 1) In order to improve the coupling between the gamma rays and the giant resonance of nuclei, gamma rays with an appropriate energy spectrum matching the characteristic of nuclear giant resonance are required. Laser Compton scattering (LCS) gamma rays seem a good alternative.…”

Section: Introductionmentioning

confidence: 99%

Iodine Transmutation through Laser Compton Scattering Gamma Rays

Imasaki

Horikawa

et al. 2009

Journal of Nuclear Science and Technology

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Research on laser Compton scattering gamma-ray-based nuclear transmutation has been carried out to identify a method of reducing the hazards of long-lifetime radioactivity of nuclear waste. To study the photonuclear reaction experimentally, a laser Compton scattering gamma-ray facility was built on a storage ring at NewSUBARU and $17 MeV gamma-ray photons were produced. An investigation on the reaction rate of radioactive iodine waste was carried out. Based on the characteristics of laser Compton scattering gamma rays, a cylindrical target was adopted for the irradiation experiment. The radioactivity of the irradiated target was measured and the transmutation reaction rate was deduced. Experimental results were close to simulation findings.

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Section: Introductionmentioning

confidence: 99%

Iodine Transmutation through Laser Compton Scattering Gamma Rays

Imasaki

Horikawa

et al. 2009

Journal of Nuclear Science and Technology

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“…Recent progress in high peak and high average power laser development has attracted a growing numb e r o f i n terests in generating x-rays by Compton (or Thomson) backscattering an intense laser pulse o a high energy electron beam [74,17]. From Eq.…”

Section: X-ray Generationmentioning

confidence: 99%

“…However, these Compton sources are somewhat limited by the relatively low x-ray yields. It is well known that the cross section of Compton scattering is quite small, and is approximately given by the Thomson cross section when the energy of the scattered photon is much less than the electron energy [35] Even with the state-of-art laser technology [74] and the development of photon storage systems [17], the x-ray ux has been limited because of either low electron intensity or low repetition rate of existing electron accelerators. Nevertheless, in a laser-electron storage ring conguration we discussed here, the interaction rate is naturally high due to the circulating nature and the compactness of storage ring.…”

Section: X-ray Generationmentioning

confidence: 99%

“…Many schemes of laser-electron interaction have been proposed for various applications such as compact x-ray sources [74,17,41,80], -colliders [65], and electronbeam diagnostics [67]. The basic principle is Compton (or Thomson) scattering o a high-energy electron beam with an intense laser pulse to produce the desired photon spectrum.…”

Section: Radiative Laser Coolingmentioning

confidence: 99%

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Radiative cooling of relativistic electron beams

Huang

Ruth²

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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Modern high-energy particle accelerators and synchrotron light sources demand smaller and smaller beam emittances in order to achieve higher luminosity o r better brightness. For light particles such as electrons and positrons, radiation damping is a natural and eective w a y to obtain low emittance beams. However, the quantum aspect of radiation introduces random noise into the damped beams, yielding equilibrium emittances which depend upon the design of a specic machine.In this dissertation, we attempt to make a complete analysis of the process of radiation damping and quantum excitation in various accelerator systems, such as bending magnets, focusing channels and laser elds. Because radiation is formed over a nite time and emitted in quanta of discrete energies, we invoke the quantum mechanical approach whenever the quasiclassical picture of radiation is insucient. We show that radiation damping in a focusing system is fundamentally dierent from that in a bending system. Quantum excitation to the transverse dimensions is absent in a straight, continuous focusing channel, and is exponentially suppressed in a focusing-dominated ring. Thus, the transverse normalized emittances in such systems can in principle be damped to the Compton wavelength of the electron, limited only by the Heisenberg uncertainty principle. In addition, we i n v estigate methods of rapid damping such as radiative laser cooling. We propose a laser-electron storage ring (LESR) where the electron beam in a compact storage ring repetitively interacts with an intense laser pulse stored in an optical resonator. The laser-electron interaction gives rise to rapid cooling of electron beams and can beused to overcome the space charge eects encountered in a medium energy circular machine. Applications to the designs of low emittance damping rings and compact x-ray sources are also explored. iv

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“…The are several papers which discuss the possibility of storing 100 MW in 100 ps length bunches[8] [5]. Presently the is no optical cavity which can store more than 1 W of energy in a 100 fs pulse.…”

Section: Lasermentioning

confidence: 99%