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Sawamura, Masaru; Furuya, Takaaki*; Sakai, Hiroshi*; Umemori, Kensei*; Shinoe, Kenji*; Cenni, E.*
Proceedings of 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs (ERL '11) (Internet), p.87 - 90, 2011/10
Two types of HOM absorber models were designed and fabricated. One type was almost actual shape except for HIP ferrite. The other was the center part of HOM absorber where ferrite was HIPped. Both models were used to estimate the cooling properties such as thermal conductivity and thermal cycle tolerance. The model with ferrite was also used to estimate the HOM absorption installing to the 9-cell cavity at the room temperature. The measured results will be presented.
Sawamura, Masaru; Hajima, Ryoichi; Nagai, Ryoji; Nishimori, Nobuyuki
Proceedings of 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs (ERL '11) (Internet), p.140 - 143, 2011/10
We are proposing non-destructive assay system of nuclear materials with laser Compton scattering combined with an energy-recovery linac and a laser. To construct this system for nuclear safeguards and security purpose, it is important to make the accelerating cavity small. The spoke cavity has advantages over the elliptical cavity to adopt for our proposing system. We are designing a spoke cavity favorable to compact cavity. Design optimization calculation of the spoke cavity shape is being carried out using 3D electro-magnetic field simulation code with multi-objective genetic algorithm. The results will be presented.
Dunham, B.*; Benson, S.*; Hernandez-Garcia, C.*; Suleiman, R.*; Nishimori, Nobuyuki; Rao, T.*; Yamamoto, Masahiro*
Proceedings of 50th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs (ERL '11) (Internet), p.10 - 29, 2011/10
Nagai, Ryoji; Hajima, Ryoichi; Nishimori, Nobuyuki
no journal, ,
It is necessary to take account of so-called magnetic emittance to obtain the electron beam with an extremely small emittance. We have utilized a bucking-coil to suppress leakage magnetic field by a solenoid lens on the surface of the cathode. The magnetic emittance correction has been successfully demonstrated in JAEA-250kV photo-cathode electron gun. In this report, we present details of the magnetic emittance correction with the bucking-coil.
Nishimori, Nobuyuki; Nagai, Ryoji; Hajima, Ryoichi; Yamamoto, Masahiro*; Miyajima, Tsukasa*; Honda, Yosuke*; Iijima, Hokuto*; Kuriki, Masao*; Kuwahara, Makoto*; Nakanishi, Tsutomu*; et al.
no journal, ,
