Beamline 10: A multipole wiggler beamline at SSRL (invited)

Abstract

A beamline has been constructed at Stanford Synchrotron Radiation Laboratory (SSRL) whose radiation source is a multipole permanent magnet '\.\iggler installed in a straight section of the SPEAR 3-3.5 GeV electron storage ring. The wiggler is a hybrid design that utilizes Nd-Fe alloy magnet material combined with Vanadium Permendur poles. It is approximately 2 m long and has 15 full wiggler periods. Its field is regulated by varying its gap height. It has a peak operating field, limited by the electron beam vacuum chamber vertical aperture, of 1.4 T. The beamline consists ofvacuum, safety, and optical components capable oftransporting photons to one hard xray (3-30 keV) end station, with provisions for implementing up to two additional branch lines. The existing hard x~ray branch can be focused by a Pt-coated toroidal mirror with a cutoff energy of approximately 22 keV. The experimental end station is serviced by a Hower-Brown type double crystal monochromator. The wiggler and beamline construction was completed in the fall of 1987 and was operated for a brief period for characterization and experimental use. We present design details and results of the initial characterization studies.

Spatially resolved X-ray diffraction mapping of phase transformations in the heat-affected zone of carbon-manganese steel arc welds

“…Movements per-C. Spatially Resolved X-Ray Diffraction pendicular to the centerline of the weld were controlled by a computer and were performed by direct translation of the The SRXRD measurements were performed on the 31-workpiece with respect to the X-ray probe. pole wiggler beam line, BL 10-2 [17] at the Stanford Synchro-A typical SRXRD run consisted of gathering 40 diffraction tron Radiation Laboratory with Stanford Positron-Electron patterns, each spaced 250 m apart, along a predetermined Accumulation Ring operating at an electron energy of 3.0 path to span a range of 10 mm through the HAZ. A software GeV and an injection current of ϳ100 mA.…”

Inclusion Formation and Microstructure Evolution in Low Alloy Steel Welds.

“…5(b). In this slow-cooling experiment, the transformation events were monitored only in the WM region of steel H. TRXRD measurements were performed on a 31-pole wiggler 10-2 beam line 51) at Stanford Synchrotron Radiation Laboratory with the Stanford Positron Electron Accumulation Ring. A photon energy of 12.0 keV (lϭ The TRXRD data from the HAZ region are presented in Fig.…”

In-Situ Chemical Dynamics and Phase Mapping Under Steep Thermal Gradients Using Time-Resolved and Spatially Resolved X-Ray Diffraction

“…SRXRD experiments were performed on the 31-pole-wiggler beam line 10-2 21 at Stanford Synchrotron Radiation Laboratory (SSRL) with the storage ring operating at an energy of 3.0 GeV and injection current of ~100 mA. Details of the SRXRD instrument can be found elsewhere 11.12 .…”