Take a state-of-the-art micro-beam sealed tube generator with a specially designed high-performance optics, add a mardtb "desktop beamline" and a EIGER2 or a PILATUS3 or a mar345= X-ray detector to it plus a cryo-cooler, put it into a shiny cabinet and you are getting a truly powerful yet very affordable complete X-ray data collection system - just perfect for single crystal crystallography, powder diffraction, SAXS, WAXS, diffuse scattering and other fields. No water and electrical installations required - it will fit anywhere in your lab.
But there's one more thing: forget about those maintenance budgets you are used to see elsewhere!
Anton Paar Primux 50 microfocus X-ray generator operating at 50 Watts (50 kV, 1000 mA) producing a microfocus spot with a size of approx. 40 by 40 µm at the source. The generator has a closed circuit water cooler that is almost maintenance-free. The generator delivers 50% more usable X-ray photons at the sample as compared to previous generations based on a Incoatec IuS source.
State-of-the-art AXO multi-layer optic producing a spot size at the sample of < 150 by 150 µm FWHM. Other configurations, e.g. for a parallel beam are available on request.
mardtb “desktop beamline” multi-purpose goniometer system, optionally with the “easymount” extension or the brand-new marxps crystallization plate scanner addition.
Optional Oxford Cryosystems “Cryostream 1000” low temperature unit.
|LN2 refill system:
Optional marLiN2 automatic LN2 refill system
|Table top and enclosure:
A functional and stable table with plenty of space for all electronics and attachments. Optional table top radiation enclosure.
Apps for iOS and Android to operate safety control system, i.e. open/close shutters and turn on/off of X-rays.
Does a micro-beam sealed-tube generator allow to evaluate the diffraction power of small crystals?
The answer clearly is: yes, it does. This is because the generator delivers a very small beam with such a high brilliance that even very small crystals sized < 50 µm will see enough X-ray photons. This is achieved by a highly optimized combination of source and optics parameters. Please read the application notes for further details!
|Beam size at sample:||≤ 160 μm FWHM at focal point|
|Beam divergence:||≤ 7.5 mrad FWHM|
|Total flux:||> 1 x 109 photons/sec|
|Focal distance:||395 mm from center of mirror|
|Anode cooling:||closed circuit water-cooling|
|Mirror protection:||diaphragm vacuum pump with interlock to shutter|
|Active area:||155.1 x 162.2 mm (2 x 4 modules)|
|Pixel size:||75 μm|
|Frame rate:||20 Hz (laboratory version)|
|Dynamic range:||32 bits|
|Active area:||155.2 x 162.5 mm (2 x 5 modules)|
|Pixel size:||172 μm|
|Frame rate:||5 Hz (laboratory version)|
|Dynamic range:||20 bits|
|Detector surface diameter:||345 mm|
|Pixel size:||150 μm standard or fast read-out, 100 μm upon request|
|Cycle times:||27-80 sec (depending on diameter and read-out mode)|
|Dynamic range:||17 bits (1-131000)|
|Sensitivity:||1.5 X-ray photons equivalent|
|LN2 auto-refill system:||marLiN2 weight based level control|
|Dimensions:||1700 x 1000 x 800 mm (w:d:h), stainless steel|
|Material:||magnetic table top and aluminum table frame|
In a second application note mar.AN070207 from Feb 07, 2007, a direct comparison between the marμX system and a rotating anode generator using the same experimental conditions (same crystals, exposure times, detector, etc.) revealed that small crystals produce superior data with the marμX system while the results for larger crystals are virtually identical.
In a third application note mar.AN20Jun08 from Jun 20, 2008, we compared the performance of the Xenocs FOX2D 10_30P optics and the latest model of the FOX3D 14_39P optics, which features an optimized high precision ellipsoidal substrate and a state-of-the-art multilayer to achieve a beam with improved focusing properties and high flux density. With the FOX3D optics we observed more than a 2-fold increase in observed diffraction as compared to the FOX2D optics, in particular when looking at small crystals. This brandnew optics narrows the gap to modern rotating anode generators, again.
In a fourth application note mar.AN28Oct10 from Oct 28, 2010, we compared the performance of the Xenocs GeniX3D Cu HF source running at 30 W with the previous Genix Cu VHF source running at 50 W. The new source entirely replaces the VHF model. It features a new tube and newly designed optics. In the application note we describe data collections from small molecule crystals of various forms and sizes. The new source proves to deliver more usable X-ray photons at the sample in the order of magnitude of 1.5. This makes the choice of a small scale generator setup even more attractive.