208
Index
Three-step model, 74
Time-Dependent Density Functional Theory
(TDDFT), 70
Time-resolved experiments, 10, 26
Time-reversal symmetry, 85
Transition
dipole, 98
operator, 84
quadrupole, 107
Triplet, 42, 165, 166, 175, 178, 179
U
Undulators, 18
conditions for constructive interference,
19
tuning, 20
Unitary, 176–178, 183, 187, 190, 192
UPt 3 , 186–190
URhGe, 197
UTe 2 , 198
V
Voltage control of magnetism, 145
W
Wigglers, 17
X
X-ray Absorption Spectroscopy (XAS), 63,
91, 148
X-ray Free-Electron Lasers (XFELs), 26
architecture, 28
bunch compression, 28
FEL parameter, 33
gain length, 34
microbunching, 31