On this page you will find an overview of the X-ray optics that have been designed for DanMAX. You can read more about the beamline and the optics in the detailed design report (version 2.0) here: DanMAX_DDR_v2.pdf (PDF: 26 MB).
Monochromator configurations at DanMAX
High intensity
High intensity using the horizontal double MultiLayer Monochromator, MLM (Two stripes: ΔE/E ~ 0.5% or 1%)
High resolution
High resolution using the Si111 horizontal double crystal monochromator, hDCM (ΔE/E ~ 2*10-4)
High resolution with higher harmonic rejection
High resolution with higher harmonic rejection using the Si111 hDCM and the MLM (ΔE/E ~ 2*10-4).
Specifications for the DanMAX optics
| Energy range | 15 - 35 keV (0.83 - 0.35 Å) |
| High resolution monochromator (hDCM) | Cryo-cooled double bounce Si111 crystal monochromator with fixed exit |
| Energy bandpass hDCM (∆E/E, FWHM) | 1.7 x 10-4 (@15 keV) - 3.2 -4 (@35 keV) |
| High intensity monochromator (hMLM) | Watercooled double bounce multi-layer monochromator with fixed exit. W/B4C and Ni0.93V0.074/B4C coatings |
| Energy bandpass hMLM (∆E/E, FWHM) | 0.3% - 1% (depending on energy and ML coating) |
| Focusing optics (CRL) | Transfocator with 0-50 Be CRLs with R=200 µm |
| Sample positions | Imaging: 40.1 m PXRD2D: 43.5 m PXRD1D: 49.0 m |
| Beam size at sample position (imaging, FWHM) | ~5 x 40 μm2 to 0.8 x 0.8 mm2 (hDCM) ~10 x 100 μm2 to 1.2 x 1.3 mm2 (hMLM) |
| Divergence at sample position, unfocused (RMS) | ~8 x 7 μrad2 (h x v, hDCM) ~16 x 10 μrad2 (h x v, hMLM) |
| Divergence at sample position, collimated (RMS) | ~1.5 x < 1 μrad2 (h x v) with the hDCM (15-35 keV) ~5 x < 0.5 μrad2 (h x v) with the MLM (15-35 keV) |
| Flux at sample position (hDCM) | ~4 x 1013 ph/s (15keV) ~5 x 1012 ph/s (35keV) |
| Flux at sample position (hMLM) | ~6 x 1014 ph/s (15 keV) ~5 x 1013 ph/s (35 keV) |
Undulator
The DanMAX undulator is designed to have a maximum brilliance of 35 keV. A 3 m in-vacuum undulator with a short period has been chosen which will deliver 35 keV radiation from the 13th harmonic. You can download the IVU and accelerator parameters in SPECTRA format here.
The undulator has been delivered to MAX IV by Hitachi Metals Ltd. and is now installed in the MAX IV 3GeV storrage ring.
| Type | In-vacuum hybrid undulator (IVU16) |
| Magnetic material | NMX-S41EH+Dy Diffusion/VP |
| Pole material | Vanadiun Perndur |
| Magnetic Length | 3 m |
| # of Periods | 187 |
| Period | 16 mm |
| Minimum magnetic gap | 4 mm |
| K max | 1.66 |
| Source size | 53.9 x 6.4 µm2 (h x v, RMS) |
| Source divergence | 11.3 x 9.8 µrad2 (h x v, RMS) |