Beam tail effect of a performance-enhanced EC-ITC RF gun

HU Tong-Ning; PEI Yuan-Ji; QIN Bin; CHEN Qu-Shan

doi:10.1088/1674-1137/37/12/128101

Chinese Physics C> 2013, Vol. 37> Issue(12) : 128101 DOI: 10.1088/1674-1137/37/12/128101

Beam tail effect of a performance-enhanced EC-ITC RF gun

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Abstract：
The beam tail effect of multi-bunches will influence the electron beam performance in a high intensity thermionic RF gun. Beam dynamic calculations that illustrate the working states of single beam tail and multi-pulse feed-in of a performance-enhanced EC-ITC (external cathode independent tunable cavity) RF gun for an FEL (free electron laser) injector are performed to estimate the extracted bunch properties. By using both Parmela and homemade MATLAB codes, the effects of a single beam tail as well as interactions of multi-pulses are analyzed, where a ring-based electron algorithm is adopted to calculated RF fields and the space-charge field. Furthermore, the procedure of unexpected deviated-energy particles mixed with an effective bunch head is described by the MATLAB code as well. As a result, the performance-enhanced EC-ITC RF gun is proved to have the capability to extract continual stable bunches suitable for a high requirement THz-FEL.

References

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HU Tong-Ning, PEI Yuan-Ji, QIN Bin and CHEN Qu-Shan. Beam tail effect of a performance-enhanced EC-ITC RF gun[J]. Chinese Physics C, 2013, 37(12): 128101. doi: 10.1088/1674-1137/37/12/128101

HU Tong-Ning, PEI Yuan-Ji, QIN Bin and CHEN Qu-Shan. Beam tail effect of a performance-enhanced EC-ITC RF gun[J]. Chinese Physics C, 2013, 37(12): 128101. doi: 10.1088/1674-1137/37/12/128101 shu

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Received: 2013-02-25
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Beam tail effect of a performance-enhanced EC-ITC RF gun

Corresponding author: QIN Bin,

Received Date: 2013-02-25

Accepted Date: 1900-01-01

Available Online: 2013-12-05

Abstract: The beam tail effect of multi-bunches will influence the electron beam performance in a high intensity thermionic RF gun. Beam dynamic calculations that illustrate the working states of single beam tail and multi-pulse feed-in of a performance-enhanced EC-ITC (external cathode independent tunable cavity) RF gun for an FEL (free electron laser) injector are performed to estimate the extracted bunch properties. By using both Parmela and homemade MATLAB codes, the effects of a single beam tail as well as interactions of multi-pulses are analyzed, where a ring-based electron algorithm is adopted to calculated RF fields and the space-charge field. Furthermore, the procedure of unexpected deviated-energy particles mixed with an effective bunch head is described by the MATLAB code as well. As a result, the performance-enhanced EC-ITC RF gun is proved to have the capability to extract continual stable bunches suitable for a high requirement THz-FEL.

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Beam tail effect of a performance-enhanced EC-ITC RF gun

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