TY - JOUR
T1 - Recent progress of a soft X-ray generation system based on inverse Compton scattering at Waseda University
AU - Sakaue, Kazuyuki
AU - Gowa, Tomoko
AU - Hayano, Hitoshi
AU - Kamiya, Yoshio
AU - Kashiwagi, Shigeru
AU - Kuroda, Ryunosuke
AU - Masuda, Akihiko
AU - Moriyama, Ryo
AU - Urakawa, Junji
AU - Ushida, Kiminori
AU - Wang, Xijie
AU - Washio, Masakazu
N1 - Funding Information:
Work has been supported by High-Tech Research Center Project of MEXT HRC707, Grant-In-Aid for JSPS Fellows (19-5789) and KEK University Support Program.
PY - 2008/10
Y1 - 2008/10
N2 - At Waseda University, we are developing a table-top size soft X-ray source based on inverse Compton scattering between a high quality electron beam and a high power laser. Using 1047 nm laser beam (Nd:YLF) and 4.6 MeV electron beam generated from a photo-cathode rf-gun, we had already succeeded in generating inverse Compton X-rays. The energies are within the "water window" region (250-500 eV) which can be applied to biological studies. For good signal to noise ratio (S/N) and a larger number of photons, we remodeled our collision chamber and laser amplifier system. S/N is defined by the X-ray photon signal over all other noises and backgrounds such as a bremsstrahlung X-rays from a lost electron beam and an electric noises caused by a radiation and rf power source. With these modifications, the X-ray photons detected by a micro channel plate (MCP) have increased 10-fold to reach 312 ph/pulse. Total generated photons were estimated to be 3.3×104. Further, we succeeded in generating stable soft X-rays for more than 12 h. Good S/N ratio, stable X-rays have made it possible to observe the beam-laser interaction very precisely. By using this technique, we have measured the electron beam size at the collision point as 251 μm (σx)×56 μm (σy).
AB - At Waseda University, we are developing a table-top size soft X-ray source based on inverse Compton scattering between a high quality electron beam and a high power laser. Using 1047 nm laser beam (Nd:YLF) and 4.6 MeV electron beam generated from a photo-cathode rf-gun, we had already succeeded in generating inverse Compton X-rays. The energies are within the "water window" region (250-500 eV) which can be applied to biological studies. For good signal to noise ratio (S/N) and a larger number of photons, we remodeled our collision chamber and laser amplifier system. S/N is defined by the X-ray photon signal over all other noises and backgrounds such as a bremsstrahlung X-rays from a lost electron beam and an electric noises caused by a radiation and rf power source. With these modifications, the X-ray photons detected by a micro channel plate (MCP) have increased 10-fold to reach 312 ph/pulse. Total generated photons were estimated to be 3.3×104. Further, we succeeded in generating stable soft X-rays for more than 12 h. Good S/N ratio, stable X-rays have made it possible to observe the beam-laser interaction very precisely. By using this technique, we have measured the electron beam size at the collision point as 251 μm (σx)×56 μm (σy).
KW - Inverse Compton scattering
KW - Photo-cathode rf-gun
KW - Soft X-ray source
KW - Water window
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U2 - 10.1016/j.radphyschem.2008.05.039
DO - 10.1016/j.radphyschem.2008.05.039
M3 - Article
AN - SCOPUS:51249092369
SN - 0969-806X
VL - 77
SP - 1136
EP - 1141
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
IS - 10-12
ER -