This Octupole End Station is the third-generation design with substantial improvements that is used for soft Xray scattering in magnetic dichroism (XMD) experiments. The system is mainly used for three applications: 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 Laboratory1. ADC improved on the ALS design by enlarging the chamber to allow for in vacuum goniometer and a significant increase in the number of ports that can be used for experimental design, such as cryogenic cooling. Eight conical electro magnets are equidistantly spaced about the surface of a sphere to create an omnidirectional field vector with a magnitude of 1 [T].

Shielded enclosures are critical components of radiation safety at scientific, medical, and industrial facilities around the world. As part of the Cornell High Energy Synchrotron Source Upgrade (CHESS-U), ADC has designed, fabricated, and installed highly modular shielded enclosures ("hutches" at synchrotron facilities). ADC utilized expert consultation offered by several facilities including engineers from Advanced Photon Source (APS)(1-3) and Cornell High Energy Synchrotron Source (CHESS); with each facility providing guidance to assure that the design satisfies the rigorous radiation safety requirements. In this paper, ADC will discuss the design of these hutches, particularly the modular design elements which facilitate rapid installation to minimize downtime at the synchrotron.

The CHESS-U upgrade' project transforms Cornell's 5.3 GeV, electron-positron colliding synchrotron into a dedicated 6 GeV light source and replaces the current experimental hall contents with six new end stations fed by pairs of canted CHESS compact undulators(2) through three new front ends. ADC is responsible for these new front ends (FE), which are comprised of all components involved in safely transporting the x-ray beams from the storage ring (CESR) to the first optical enclosure (FOE) beyond the storage ring shielding wall. Accelerated installation of each FE is achieved by installation and alignment of all components onto a single massive steel I-beam structure; improving on the SPring-8 parallel I-beam concept(3). In this paper, ADC will discuss various unique design elements that reduce installation time and optimize the spatial envelope of the front ends.

A 3-axis optical table, shown in Figure 1, was designed, fabricated, and assembled for the SOLARIS synchrotron facility at the Jagiellonian University in Krakow, Poland. To accommodate the facility, the table was designed to be very low profile, as seen in Figure 2, and bear a high load. The platform has degrees of freedom in the vertical (Z) direction as well as horizontal transversal (X and Y) directions. The table is intended to sustain loads as large as 1500 kg which will be sufficient to support a variety of equipment to measure and facilitate synchrotron radiation. After assembly, the table was tested and calibrated to find its position error in the vertical direction. ADC has extensive experience designing and building custom complex high precision motion systems [1,2].

The design of a state-of-the-art selector wheel instrument to support the area of neutron imaging research (neutron radiography/tomography) is discussed. The selector wheel is installed on the DINGO Radiography instrument at the Bragg Institute HB2 beamline at ANSTO in Sidney Aus. The selector wheel consists of a single axis drum filled with a wax/steel shielding mixture and six square cutouts for neutron optics and a larger solid shielding sector to act as a shutter. This paper focuses on the details of design and shielding of the selector wheel.

The design of a new Very Small Angle Neutron Scattering (VSANS) Instrument for use in National Institute of Standards And Technology (NIST) will be discussed. This instrument is similar to a shorter instrument we designed and delivered to ANSTO in Australia called the Bilby SANS instrument. The NIST VSANS and the ANSTO Bilby SANS instruments have very similar dimensions for length and diameter and have similar requirements for internal detector motion, top access port, walkway supports, and ports; however, the Bilby SANS instrument vacuum requirement was lower (7.5x10-5 Torr) and the entire (60,000 pound) vessel was required to move 1.5 meters on external rails with a repeatability of 100 um, which ADC achieved. The NIST VSANS length is 24 meter, internal diameter 2.3 meter with three internal carriages.The NIST VSANS instrument, which covers the usual SANS range will also allow configuration to cover the range between q approximate to 10(-40) angstrom(-1) to 10(-3) angstrom(-1) with a sample beam current of (104 neutrons/s). The key requirements are a second position-sensitive detector system having a 1 mm pixel size and a longer sample-detector flight path of 20 m (i. e., a 40 m instrument).[GRAPHICS].

Ionization Chambers have been commonly used at beamlines in many synchrotron radiation facilities. Typical ADC ion chambers are pictured in Figure 1. The chambers generate a current proportional to the incident X-ray beam intensity. The ionization chamber allows users to determine the change in beam position in a single axis by comparing two signals that are created as the beam passes through the Ion Chamber [1]. By connecting two Ion Chambers together at 90° you can determine the horizontal and vertical beam position. One unique feature of the new precision ion chambers is the incorporation of a split collector plate. The electrode is split in a saw tooth configuration with a height of approximately 10mm, 15mm, and 25mm such that, when the differential current is computed, allows use as a beam position monitor. A summary test results from the hard X-ray beamline, BL06, at bending magnet source of SAGA Light Source in Japan is presented. (a) (b) (c) (d) FIGURE 1. (a) & (b) ADC’s IC-400 Series, (c) ADC’s IC-500 Series, (d) ADC’s Micro Ion Chamber INTRODUCTION The reliable monitoring of the intensity of the X-ray beam in the case of synchrotron-radiation-induced measurements is crucial for correcting the intensity change caused by the different optical and beam influencing elements at the beam line. In order to probe precisely the change in the intensity of the X-ray radiation penetrating the sample, a counter should be introduced between the last optical or beam influencing element and the sample. FIGURE 2. Parallel Plate Geometry Typical ionization chambers are constructed with the parallel plate geometry as illustrated in Figure 2. As the voltage is increased, the resulting electric field begins to separate electron-ion pairs generated by ionizing radiation more rapidly, and the recombination process between the electrons and the ions are diminished. At a sufficiently high applied voltage, the electric field becomes strong enough to suppress the recombination process to a negligible level, and all the charges initially created through the ionization process contribute to the ionization current. Under these conditions, the current measured in the external circuit can be regarded as an indication of the formation rate of all charges due to ionization by the incident X-ray photons. Absorption of x-ray photons in materials follows the rule, I = Ioe-μt where I is the x-ray intensity after passing through a material, Io is the initial intensity, μ is the absorption coefficient for that particular photon energy and t is the thickness of the absorbing material. This photon absorption results in an electron/ion pair being produced in the absorber material. All an “ion chamber” does is to apply a potential held around these newly created electron/ion pairs, separate them and measure the resulting electric current to determine how many pairs were created and thus how many photons were absorbed [2].

The first pre-prototype of a single-coil superconducting miniundulator has been built and studied. Its basic specifications include 10 main periods and two end compensation periods, a period length of 7 mm, and a gap of 2 mm. The design is based on a racetrack-like coil configuration that is subsequently compressed to form the gap region with the spatially alternating currents flowing perpendicularly to the electron beam above and below the midplane. Operation up to an excitation current slightly beyond 400 A before quenching resulted in a peak magnetic flux density on axis of about 1 T and an undulator parameter of K about 0.65.

In this paper ADC will discuss the design and test results for a custom high precision motion system to manipulate a 7 ton press (fabricated by Rockland Research Corporation). The system was installed at Beamline X17B2 NSLS for High Pressure Mineral Physics research. The beamline contains 0.391 mm of graphite filters, .500 mm silicon filter, and 2.0 mm of beryllium windows. The experimental apparatus consists of a large volume (~1 cu mm) multi-anvil press in either cubic or octahedral mode, providing pressures up to 29 GPa and temperatures up to 2000 K.

In this paper Advance Design Consulting USA, Inc. (ADC) will discuss ADC's major improved capabilities for building Wiggler Insertion Devices, Undulator Planar Devices, Elliptical Polarizing Undulators (EPU), In-Vacuum Undulators (IVU), Cryogenically Cooled in-vacuum Undulators (CPMU), Super Conductive Undulator, and Insertion Device Magnetic Measurement Systems. ADC has designed, built and delivered Insertion Devices and Magnetic Measurement Systems to such facilities as MAX-lab (two EPUs, a Planar, and Measurement System), ALBA and ASP (Wigglers), BNL (CPMU), SSRF (two IVUs and a Measurement System), PAL (one IVU and Measurement System), NSRRC (one 4m EPU), and SRC (Planar and EPU). ADC's magnetic field measurement system is a sophisticated and sensitive machine for the measurement of magnetic fields in undulators (Planar and EPU), wigglers and in-vacuum ID units. The magnetic fields are measured using 3 axis hall-effect probes, mounted orthogonally, to a thin wand. The wand is mounted to a carriage that rides on vacuum air bearings. The base is granite. A flip coil is provided on two vertical towers with X, Y and Theta axes. Special software is provided to assist in homing, movement, and data collection and analysis.

This paper describes the mechanical design, control instrumentation and test results for the Integrated Field Measurement System (IFMS) for the Magnetic Measurement Lab for the National Synchrotron Light Source II (NSLS-II) project at Brookhaven National Laboratory.

This paper describes development and initial results for a small prototype superconducting undulator with a period less than 1 cm, referred to here as a “supermini” undulator. The development of superconducting mini-undulators started in the early 1990s with work at BNL and KIT (Germany). In 1998, KIT demonstrated the first photon production with a super-mini of 3.8 mm period length [1]. This super-mini consisted of two coils wound bi-filarly in analogy to a solenoid. If such coils are arranged alongside each other, separated only by a small gap on the order of a couple of millimeters, a spatially alternating magnetic field is produced that makes a passing electron beam undulate and emit undulator radiation. Owing to the short period length, the photon energy is much higher than with conventional undulators at the same electron energy. Likewise, for a given photon energy, the electron energy can be much smaller entailing considerable cost savings of accelerator, building, and operations. PROTOTYPE SUPER-MINI The prototype Super-Mini undulator supports a 7.0 mm period, K factor of 0.72, gap of 2 mm, 10 periods with 2 end periods, and a field of 1.1 T with an expected current density of 1000 A/mm2. The overall length of the prototype device is 80 mm. This device utilizes a unique winding pattern that facilitates the very short period. This sort of device has been called a “singlecoil super-mini”.