A single-pass high-gain x-ray free electron laser (FEL) calls for a high quality electron bunch. In particular. for a seeded FEL amplifier and for a harmonic generation FEL. the electron bunch initial energy profile uniformity is crucial for generating an FEL with a narrow bandwidth. https://www.chiggate.com/charcotabs-activated-charcoal-250mg-60-tablets-supply/