Soft X-ray Scattering Octupole End Station
The Octupole End Station is used for soft X-ray scattering in magnetic dichroism (XMD) experiments. The system is mainly used for three applications, i.e., constant field for the duration of an x-ray absorption scan, point-by-point field reversal for an XMD photon energy scan, and hysteresis loop measurements.
The ADC Octupole is based on earlier designs and work performed by Elke Arenholz and Soren O. Prestemon at Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, Ca. ADC improved on the ALS design and has performed several design improvement iterations (see chart below)
Eight conical electro magnets (coils) are equidistantly spaced about the surface of a sphere to create an omnidirectional field vector with a magnitude of 1 [T]. The magnets protrude into an ultra high vacuum chamber with a base pressure of 5E-10 [mbar] that houses both the sample and detector apparatus. The entire system is then capable of tilt rotation vertically about the beam axis +/- 45O. The 1T field is achieved by the combination of fields from 2 or more coils.
Technical Specification Base System:
Comparison of ADC and ALS Octupoles
Note: The original idea for this Octupole End Station was originated from ALS:
Elke Arenholz and Soren O. Prestemon
ADC offers a large assortment of synchrotron and neutron equipment including; High Precision Slits, Optical Tables, Lead Shielded Beam Pipes, Micro Ion Chambers, Split Two Axis Ion Chambers, Mirror Systems, Monochromators, Spectrometers, Insertion Devices (EPU, Wiggler, Planar, In-Vacuum, Apple), ID Measurement System and many other Beamline Components. Our products are being used at many synchrotron, neutron, and x-ray facilities around the world including; APS, NSLS, ALS, DLS, NSRRC, BESSY, DESY, CHESS, ESRF, BSRF, CAMD, NSRL, PAL, LNLS, CLS, SSRF, ANKA, KEK, SPring-8, ASP, ELETTRA, MAX-LAB.