The Mini-Kappa MK3 is a multi-axes goniometer head for MX crystallography beamlines.
It purveys additional κ & Φ axes, giving numerous possibilities of crystal reorientation. The Mini-kappa MK3 is a co-development of Arinax & the EMBL Grenoble Instrumentation Group (Cipriani team).
Rotational precision: ±0.05°
Travel Range: 0 to 255°
Resolution: 0.35 mdeg
Rotational precision: ±0.09°
Travel range: 360° (no limitation)
Resolution: 1.41 mdeg
(Χ) Chi axis:
- Travel Range: 0 to 48°. Value depends of the kappa-axis’ position.
Easy & safe sample change
Compatible with sample changer robot
Adapted to vial or gripper based transfer
Collision safe system
Fully-compatible with Arinax diffractometers
Available in standalone version
Alone or with Arinax centering table
This video presents the Mini-Kappa Goniometer head mounted on a MD2-S microdiffractometer.
The Mini-Kappa is dedicated to MX crystallography synchrotron beamlines. It purveys additional Kappa & Phi axes, giving numerous possibilities of crystal reorientation.
The multi-axis goniometer head for MX crystallography
The Mini-Kappa MK3 is a multi-axis goniometer head with reduced dimensions that purveys additional κ & Φ axes, giving numerous possibilities of crystal reorientation.
It reaches a rotational precision of ±0.05° for κ axis & ±0.09° for Φ axis and can be equipped with the SmartMagnet sample holder.
Mounted on a MD3 High Precision X-ray diffractometer, the Sphere of Confusion (SOC) that is achieved on the Ω axis is <1 µm (measured with a Mini-Kappa in maximal opening position – 180 deg – @ 90 deg/s)
Data Collection optimization
The mini-kappa MK3 considerably optimizes the data collection process by reducing the redundant protocol steps: it limits the number of diffractions needed to complete the data collection and avoids spot overlaps.
Thanks to the additional kappa & Phi axes rotation, X-ray diffraction isn’t limited to one “crystal frame” but is realized on the entire crystal: the diffraction is more distributed over the crystal, limiting radiation damage.
Needed Volume that includes the Mini-kappa MK3 and the free space required for kappa movements is contained in a cylindrical volume with exceptional compact dimension of 120 mm length and 131 mm diameter.
Collision Safe System
The Mini-kappa MK3 is able to detect potential risk of collision with equipment, such as a robotic arm (e.g. Staubli robot). If an obstacle is on the path of the kappa movement, the integrated detector initiates the “Omega Stop” safety sequence: the kappa movement is stopped and information is conveyed to the beamline terminal.
Designed for modern MX crystallography beamlines, the Mini-kappa MK3 is compatible with sample changer robot using a vial or a gripper transfer, such as the 6-axis sample changer robots.
5 minutes Switchable Equipment
In order to give the best flexibility to users, the Mini-kappa MK3, the Plate manipulator and the SmartMagnet are designed to be easily mounted and dismounted according to user need: the switch from one to another takes about 5 minutes and only one person is required to do the switch.
(2017) J Synchrotron Radiat.; 24(Pt 1): 323–332. « P13, the EMBL macromolecular crystallography beamline at the low-emittance PETRA III ring for high- and low-energy phasing with variable beam focusing »
|Sphere of Confusion|
|Measured on MD3 Ω axis
(Mini-Kappa in open position)
|K Kappa axis|
– Travel range
0 to 255°
|Φ Phi axis|
– Travel range
360° (no limit)
|X Chi axis|
|Angular Range/Travel range||0 to 48°. Kappa-axis position dependent.|
|Sample pin requirement|
|International Standard “SPINE”||22 mm length|
(included needed volume for kappa movement)
|120 mm & 131 mm (L, D)|