IH型永磁漂移管加速腔初步设计
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摘要
设计了一个用于加速低能质子的永磁聚焦IH型漂移管加速腔。通过迭代设计,使得束流通过每个漂移管中心的束流相位与预设值一致。设计的永磁聚焦IH型漂移管加速腔将质子束从0.75 MeV加速到2.5 MeV,长度0.96m,分流阻抗约90 MΩ/m。不考虑束晕和误差因素,50mA流强下该漂移管加速腔中的束流损失可以控制在0.1%量级。
A permanent magnet focused IH type drift tube linac(IH-DTL)cavity was designed for accelerating low energy proton.Using adaptive dimension adjustment,the beam phase at the center of every drift tube was adjusted to be equal to the set value.The IH-DTL designed in this paper has a length of 0.96 mand a shunt impedance of about 90MΩ/m,it can accelerate protons from 0.75 MeV to 2.5MeV.The beam envelope in the IH-DTL was computed by the program TRACE3 D.If the beam halo and errors were neglected,the beam loss can be controlled to be approximately 0.1% when the beam current is 50 mA.
A permanent magnet focused IH type drift tube linac(IH-DTL)cavity was designed for accelerating low energy proton.Using adaptive dimension adjustment,the beam phase at the center of every drift tube was adjusted to be equal to the set value.The IH-DTL designed in this paper has a length of 0.96 mand a shunt impedance of about 90MΩ/m,it can accelerate protons from 0.75 MeV to 2.5MeV.The beam envelope in the IH-DTL was computed by the program TRACE3 D.If the beam halo and errors were neglected,the beam loss can be controlled to be approximately 0.1% when the beam current is 50 mA.
引文
[1]Kurennoy S S,Rybarcyk L J,Wangler T P.An H-mode accelerator with PMQ focusing as a LANSCE DTL replacement[C]//Proc of IPAC.2011:2655.
[2]Ratzinger U.H-type linac structures[C]//CERN Accelerator School.2000.
[3]Kurennoy S S,O’Hara J F,Olivas E R,et al.H-Mode accelerating structures with PMQ focusing for low-beta ion beams[C]//Proc of IPAC.2010:828.
[4]Kurennoy S S,Rybarcyk L J,O’hara J F,et al.H-mode accelerating structures with permanent-magnet quadrupole beam focusing[J].Physical Review Special Topics—Accelerators and Beams,2012,15:090101.
[5]Kurennoy S S,O’Hara J F,Olivas E R,et al.Efficient low-beta H-mode accelerating structures with PMQ focusing[C]//Proc of LINAC.2008:954.
[6]Tiede R.Status of the RT CH-DTL development and beam dynamics layout of the GSI proton linac[C]//HIPPI Annual Meeting,Frankfurt,2004
[7]Brodhage R,Ratzinger U,Podlech H,et al.Prototype construction of a coupled CH-DTL proton linac for FAIR[C]//Proc of PAC.2009:4908.
[8]Iwata Y,Fujisawa T,Hojo S,et al.Performance of alternating phase focused IH-DTL[C]//Proc of LINAC.2006:136.
[9]Halbach K.Magnet innovations for linacs[C]//Proc of 1986Linear Accelerator Conference.1986:407.
[10]杨国君,张卓,何小中.750keV射频四极注入器束流动力学设计[J].强激光与粒子束,2007,19(9):1533:1536.(Yang Guojun,Zhang Zhuo,He Xiaozhong.Beam dynamics design of a 750keV radio frequency quadrupole injector.High Power Laser and Particle Beams,2007,19(9):1533-1536)
[11]杨国君,张卓,何小中.750keV射频四极注入器射频结构的优化[J].强激光与粒子束,2008,20(8):1349-1352.(Yang Guojun,Zhang Zhuo,He Xiaozhong.RF optimization design of a 750keV radio frequency quadrupole injector.High Power Laser and Particle Beams,2008,20(8):1349-1352)
[2]Ratzinger U.H-type linac structures[C]//CERN Accelerator School.2000.
[3]Kurennoy S S,O’Hara J F,Olivas E R,et al.H-Mode accelerating structures with PMQ focusing for low-beta ion beams[C]//Proc of IPAC.2010:828.
[4]Kurennoy S S,Rybarcyk L J,O’hara J F,et al.H-mode accelerating structures with permanent-magnet quadrupole beam focusing[J].Physical Review Special Topics—Accelerators and Beams,2012,15:090101.
[5]Kurennoy S S,O’Hara J F,Olivas E R,et al.Efficient low-beta H-mode accelerating structures with PMQ focusing[C]//Proc of LINAC.2008:954.
[6]Tiede R.Status of the RT CH-DTL development and beam dynamics layout of the GSI proton linac[C]//HIPPI Annual Meeting,Frankfurt,2004
[7]Brodhage R,Ratzinger U,Podlech H,et al.Prototype construction of a coupled CH-DTL proton linac for FAIR[C]//Proc of PAC.2009:4908.
[8]Iwata Y,Fujisawa T,Hojo S,et al.Performance of alternating phase focused IH-DTL[C]//Proc of LINAC.2006:136.
[9]Halbach K.Magnet innovations for linacs[C]//Proc of 1986Linear Accelerator Conference.1986:407.
[10]杨国君,张卓,何小中.750keV射频四极注入器束流动力学设计[J].强激光与粒子束,2007,19(9):1533:1536.(Yang Guojun,Zhang Zhuo,He Xiaozhong.Beam dynamics design of a 750keV radio frequency quadrupole injector.High Power Laser and Particle Beams,2007,19(9):1533-1536)
[11]杨国君,张卓,何小中.750keV射频四极注入器射频结构的优化[J].强激光与粒子束,2008,20(8):1349-1352.(Yang Guojun,Zhang Zhuo,He Xiaozhong.RF optimization design of a 750keV radio frequency quadrupole injector.High Power Laser and Particle Beams,2008,20(8):1349-1352)