[3H08-13] Accelerator, FEL, Laser

[3H10] Measurement of the magnetic field gradient of a MEBT quad at LIPAc

*Jibong Hyun¹, Akihiko Mizuno^1,2, Ken Takayama³, Kai Masuda¹, Keitaro Kondo¹, Conchi Oliver⁴, Beatriz Branas⁴, Nicolas Chauvin⁵, Integrated Project Team IFMIF/EVEDA⁶ (1. QST, 2. JASRI, 3. KEK, 4. CIEMAT, 5. CEA, 6. IFMIF/EVEDA Integrated Project Team)

Keywords:deuteron accelerator, quadrupole magnet, magnetic field gradient, fringe-field model, hard-edge model

The hard-edge model for a quad, assumes that magnetic fields at the edges sharply fall down, is often employed in beam optics simulations. Fringe fields of a quad are one of the reasons why mismatches between the designed and measured beam optics are caused. To investigate the fringe field of a quad installed in the MEBT at LIPAc, we measured the magnetic gradient of the quad with a 5MeV deuteron beam and compared it with one obtained by particle tracking simulations using hard-edge and field map models.