Channel-cut
Crystal Monochromator
The compact channel cut monochromator (CCM) can be used for experiments with hard X-rays on bending magnet and insertion device beamlines. It is built to an NSLS design.
This CCM is a very compact design, with simple mechanical controls. It is particularly suitable for use when space restrictions prohibit the use of other monochromators, or when an economical design is required.
The CCM has a fixed crystal gap that causes the exit beam height to vary relative to the incident beam as the energy changes.
The motorised Bragg angle range is about 11°. The CCM can be supplied with manual repositioning to extend the total Bragg angle range up to 60°.
Specifications
| Vacuum performance | <1×10-7mbar |
| Bragg angle resolution | <0.5μrad |
| Motorised Bragg angle range | Up to ~60° in steps of 11° |
| Vertical acceptance | 6mm (typical) |
| Horizontal acceptance | 40mm (typical) |
| Typical energy range with Si(111) | 2.5 to 30keV |
| Actuators | Stepper motor (Bragg Angle) 2xPicomotor (yaw and crystal de-tune) |
| Max heat load | 100W (typical) |
| Cooling | Indirect to 1sy crystal |
| Device length | 330mm (typical) |
| System based on Peter Siddons’ design in use at the NSLS, Brookhaven. | |
