Multi-Physics Analysis of Two Bunchers for CIFNEF

Qiuyun Tan, Matthew Easton, Qi Fu, Pingping Gan, Haipeng Li, Yuanrong Lu, Zhi Wang, Schaa, Volker RW (Ed.), Satogata, Todd (Ed.)
2018
CIFNEF(Compact Intense Fast NEutron Facility) project will accelerate and deliver a 5 MeV deuteron beam to the targets to produce high-intense neutrons. A 2.5 MHz pulsed deuteron beam with bunch width within 2 ns is needed on the targets at last. To fulfill the special requirements of the beam dynamics, two types of bunchers are adopted in the CIFNEF. One is a 10.156 MHz buncher used in the low energy beam transport (LEBT) line to longitudinally focus the 50 keV deuteron beam to the RFQ
more » ... to the RFQ longitudinal acceptance with 4 kV effective voltage. A lumped element model is adopted because of the low frequency and it consists of an inductance coil in parallel with the capacitance of drift tube. The other one is an 81.25 MHz buncher used in the high energy beam transport (HEBT) line to longitudinally focus the 5 MeV deuteron beam to 2 ns. A QWR cavity with 2-gaps is used to provide 150 kV effective voltage. Thermal and structural analyses have been carried out on these two bunchers. Details of simulations of these two bunchers are presented and discussed in this paper.
doi:10.18429/jacow-ipac2018-thpal070 fatcat:texqrn4a2nfv3gun5ymu4kqwvi