Gamma rays produced by intra-cavity inverse Compton scattering of a storage ring free-electron laser
Gamma rays produced by intra-cavity inverse Compton scattering of a storage ring free-electron laser
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存储环自由电子激光器腔内逆康普顿散射产生的伽马射线
DOI：
10.1088/0953-4075/32/24/303
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Billardon
中科院分区：
文献类型：
--
作者：
M. Couprie;D. Nutarelli;R. Roux;B. Visentin;L. Nahon;R. Bakker;A. Delboulbé;M. Billardon
在紫外光(345-355 nm)范围内，利用位于光学谐振腔内的Super-ACO存储环自由电子激光器(FEL)，通过额外的正电子束的逆康普顿散射，产生了准直可调谐伽马射线束。这种特殊的新颖设置确保了自然的横向重叠和同步。产生的可调谐伽马射线束的能量范围从几个MeV到35 MeV，这是自由电子激光可以实现的最大能量。散射伽马射线的数量相对较大(800 MeV时为5000 000光子/S，700 MeV时为2000 000光子/S，即自由电子激光的最大值)。此外，存储在光学腔中的自发辐射的散射也产生了大量的高能伽马射线。从波荡器外部的正电子束进行散射，首次证明了在不改变自由电子激光的情况下，通过改变存储的光束来优化产额和/或光谱的可能性。
A collimated tunable gamma-ray beam has been generated by inverse Compton scattering of an additional positron bunch with the Super-ACO storage ring free-electron laser (FEL) positioned inside the optical resonator in the UV range (345-355 nm). This specific novel set-up ensures a natural transverse overlap and synchronization. The tunable gamma-ray beam produced covers the energy range from a few MeV up to 35 MeV, the maximum energy achievable with a FEL. The number of scattered gamma rays is relatively large (5000 000 photons/s at 800 MeV and 2000 000 photons/s at 700 MeV, i.e. the greatest value for a FEL). Furthermore, a significant number of high-energy gamma rays have also been produced by scattering of the spontaneous radiation stored in the optical cavity. The scattering is performed from a positron bunch outside the undulator, demonstrating for the first time the possibility of optimizing the yield and/or the spectrum by alteration of the stored beam without alteration of the FEL.