Paper |
Title |
Page |
TUPAB070 |
S-Band Accelerating Structure for High-Gradient Upgrade of TTX |
1485 |
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- D.Z. Cao, H.B. Chen, Y.-C. Du, W. Gai, W.-H. Huang, X.C. Meng, J. Shi, C.-X. Tang, X.W. Wu, H. Zha
TUB, Beijing, People's Republic of China
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Thomson scattering x-ray source is an indispensable scientific X-ray imaging tool in various research fields. The 3-meter S-band linac in Tsinghua Thomson scatter-ing X-ray source (TTX) has been running at an accelerat-ing gradient of 15 MV/m so far. The gradient will be upgraded to 30MV/m by replacing the old structure with a shorter linac. Detailed optimization of the RF design of the new S-band linac structure is presented in this paper. Finally, further research on energy upgrade with X-band structures are also discussed.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB070
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THPAB031 |
Study of Beam Break Up in Irradiation Linacs |
3767 |
SUSPSIK056 |
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- X.C. Meng, H.B. Chen, W. Gai, J. Shi, S.X. Zheng
TUB, Beijing, People's Republic of China
- G.H. Li, J.S. Liu, Y.H. Liu
NUCTECH, Beijing, People's Republic of China
- F.H. de Sá
LNLS, Campinas, Brazil
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Many recent experiments of the irradiation linacs produced at Tsinghua University indicate that beam power is limited by beam break up (BBU). Limits exist while the beam current or the pulse width is increased. In this paper, we illustrate the bream break up (BBU) phenomenon in the cases of both the 10MeV travelling-wave linac and 10MeV backward travelling-wave linac. The higher order modes in the linacs are analysed and the wake fields are calculated both with theoretical analysis and numerical simulation. Also, the beam dynamics is studied on the basis of the wakefield results to find a BBU threshold in these structures.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB031
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