4 papers
Fully-staggered-array bulk Re-Ba-Cu-O short-period undulator: large-scale 3D electromagnetic modelling and design optimization using A-V and H-formulation methods
Kai Zhang, Mark Ainslie, Marco Calvi +2
The development of a new hard x-ray beamline I-TOMCAT equipped with a 1-meter-long short-period bulk high-temperature superconductor undulator (BHTSU) has been scheduled for the up…
Fast and efficient critical state modelling of field-cooled bulk high-temperature superconductors using a backward computation method
Kai Zhang, Mark Ainslie, Marco Calvi +3
A backward computation method has been developed to accelerate modelling of the critical state magnetization current in a staggered-array bulk high-temperature superconducting (HTS…
A micro channel-cut crystal X-ray monochromator for a self-seeded hard X-ray free-electron laser
Taito Osaka, Ichiro Inoue, Ryota Kinjo +5
A channel-cut Si(111) crystal with a channel width of 90 m was developed for achieving reflection self-seeding in hard X-ray free-electron lasers (XFELs). With the crystal, a mo…
Free electron lasers assisted by pseudo energy bands
Takashi Tanaka, Ryota Kinjo
We propose a new scheme for high gain harmonic generation free electron lasers (HGHG FELs), which is seeded by a pair of intersecting laser beams to interact with an electron beam…