The installation of the APS-U has a short schedule of one year, making it imperative to be well prepared before the installation process begins. The Component Database (CDB) has been designed to help in documenting and tracking all the components for APS-U. Two new major domains, Machine Design domain and Measurement and Analysis Archive (MAARC) domain, have been added to CDB to further its ability in exhaustively documenting components. The Machine Design domain will help define the purpose of all the components in the APS-U design and the MAARC domain allows association of components with collected data. The CDB and a traveler application from FRIB have been integrated to help with documenting various processes performed, such as inspections and maintenance. Working groups have been formed to define appropriate work flow processes for receiving components, using the tools to document receiving inspection and QA requirements. The applications are under constant development to perform as expected by the working groups. Over some time, especially after production procurement began, the CDB has seen more and more usage in order to aid in preparation for the APS-U installation.

The Advanced Photon Source (APS) is currently in the preliminary design phase for a multi-bend acromat (MBA) lattice upgrade. Beam stability is critical where the requirements are driven by beam size which is expected to approach 4 μm vertically at the insertion device (ID) source points. AC rms beam stability requirements are defined as 10 % the minimum source size at the ID in the band 0.01-1000 Hz. The vertical plane stability goal is the most ambitious requiring a stability of 0.4 μm at the ID source point. In addition, long term drift defined as motion over a seven day period can be no more than 1 μm. In order to achieve these demanding beam stability requirements, a suite of beam diagnostics will be required including rf BPMs, X-ray BPMs, a mechanical motion measurement system (MMS), beam size monitors and a real time orbit feedback system. In addition, a tune measurement system, transverse multi-bunch feedback system and current monitors are planned for the upgrade. We report on the beam diagnostics design and APS storage ring R&D results used to inform the design.

The purpose of the Advanced Photon Source Upgrade (APS-U) project is to update the facility to take advantage of the multi-bend achromat (MBA) magnet lattices, which will result in narrowly focused x-ray beams of much higher brightness. The APS-U installation has a short schedule of one-year. In order to plan and execute a task of such complexity, a collaboration between many individuals of very diverse backgrounds must exist. The Component Database (CDB) has been created to aid in documenting and managing all the parts that will go into the upgraded facility. After initial deployment and use, it became clear that the system must become more flexible, as the engineers started requesting new features such as tracking inventory assemblies, supporting relationships between components, and several usability requests. Recently, a more generic database schema has been implemented. This allows for the addition of more functionality without needing to refactor the database. The topics discussed in this paper include advantages and challenges of a more generic schema, new functionality, and plans for future work. GENERIC DATABASE SCHEMA The initial version of the CDB software [1] was based on a database schema designed around concepts like "component" and "design" (a design being made up of several components). As new use cases emerged for tracking and managing different sets of objects, it became clear that a new set of similar database tables had to be created every time there was a need to support a new type of object. Illustrated in Fig. 1 is a simplified conceptual design representation of how the set of tables had to be recreated for components, component instances, designs, and design elements. All of these entities had a set of standard attributes, such as a name, ownership information, description, properties, logs, and some have additional connections. This means that every time a new entity was added, it needed a set of standard associative tables to go along with it as well as any additional entity specific tables. ∗ The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan. http://energy.gov/downloads/doe-public-access-plan † djarosz@aps.anl.gov Figure 1: Conceptual simplified example of the old nongeneric schema design. Moving to a generic schema resulted in having generic tables for items and item elements (see Fig. 2). Each item now has a "self element" that represents the connections of that item. An item may also have a hierarchical structure by having more elements. All items are assigned a domain, which are similar to the previous component, component instance, etc. The assigned domain determines the possible associations of a particular item.

The APS multi-bend achromatic (MBA) upgrade storage ring plans to support two bunch fill patterns: a 48-bunch and a 324-bunch. A “swap out” injection scheme is required. In order to provide the required kick to injected beam, to minimize the beam loss and residual oscillation of injected beam, and to minimize the perturbation to stored beam during injection, the rise, fall, and flat-top parts of the kicker pulse must be within a 16.9-ns interval. Stripline-type kickers are chosen for both injection and extraction. We developed a prototype kicker that supports a ±15kV differential pulse voltage. We performed high voltage discharge, TDR measurement, high voltage pulse test and beam test of the kicker. We report the final design of the fast kicker and the test results. INTRODUCTION A prototype stripline kicker was developed for the APS MBA upgrade storage ring. Its design was reported in IPAC15 [1]. Further optimization of the kicker model was performed. Fabrication of the kicker and feedthroughs started February of 2016. The kicker was delivered recently. We performed a series of tests of the kicker. We report the final design of the kicker and the test results. Figure 1: Geometry of the stripline kicker 2-D model. With these parameters: a=7.8 mm, b=7.14 mm, α = 43.83°, a0= 2.87mm, a00=15.91 mm, b0=14.54 mm, blade thickness=3.0 mm. FINAL KICKER GEOMETRY CST Microwave Studio [2] was employed in the optimization simulation of the kicker and feedthrough. We used its frequency domain solver to perform 3D impedance and field simulation, and optimization of the matching of the interface between the feedthroughs and the kicker blades. We also use its time-domain tool to evaluate the impedance of a Gaussian beam bunch. CST MW studio has TDR simulation. We compared its results with TDR measurement of the kicker [3]. A final geometry was selected. Figure 1 shows the main cross-section of the final geometry and its parameters. Figure 2 shows a 3D model of the kicker. Figure 2: A plot of the kicker design model.

The Advanced Photon Source (APS) storage ring orbit real-time feedback (RTFB) system plays an important role in stabilizing the orbit of the stored beam. An upgrade is planned that will improve beam stability by increasing the correction bandwidth to 200 Hz or higher. To achieve this, the number of available steering correctors and beam position monitors (BPMs) will be increased, and the sample rate will be increased by an order of magnitude. An additional benefit will be the replacement of aging components. Simulations have been performed to quantify the effects of different system configurations on performance.

The APS has the largest installed base of closed-loop photon beam position monitors of any facility in the world; however, many portions of the orbit control systems use aging and near-obsolete components. Substantial improvements in beam stability are planned as part of the ongoing APS upgrade project. Among the planned improvements is a replacement of the present real-time feedback system using modern technology to increase the sample rate from 1.5 kHz to near 20 kHz. Because of this, new data acquisition options are being explored to support existing and new types of x-ray beam position monitors (XBPMs). Performance data collected from existing hardware, the APS-designed BSP-100 module and two commercial solutions, will be compared and contrasted.

Transition radiation is frequently used to determine the time profile of a bunched relativistic particle beam. Emphasis is usually given to diagnostics sensitive to wavelengths in the infrared-to-optical portion of the spectrum. In this study, CST Particle Studio simulations are used to make quantitative statements regarding the low-frequency (DC to microwave) behavior of coherent transition radiation from a mirror inclined at 45 degrees relative to the particle beam trajectory. A moving Gaussian bunch confined within a cylindrical beam pipe is modeled. Simulation results are presented.

The Advanced Photon Source (APS), a third-generation synchrotron light source, has been in operation for eleven years. The monopulse radio frequency (rf) beam position monitor (BPM) is one of three BPM types now employed in the storage ring at the APS. It is a broadband (10 MHz) system designed to measure single-turn and multi-turn beam positions, but it suffers from an aging data acquisition system. The replacement BPM system retains the existing monopulse receivers and replaces the data acquisition system with high-speed analog-to-digital converters (ADCs) and a field-programmable gate array (FPGA) that performs the signal processing. The new system has been installed and commissioned in a full sector of the APS. This paper presents the results of testing the beam position monitor, which is now fully integrated into the storage ring orbit control and fast feedback systems.

The Advanced Photon Source (APS) storage ring rf beam position monitors (BPMs) are impacted by the presence of beam-excited transverse electric (TE) modes. These modes are excited in large-aperture vacuum chambers and become trapped between the bellow end flanges. The TE modes are vertically oriented and are superimposed on the TEM beam position signals, corrupting the BPM measurements. Erroneous step changes in beam position measurements and systematic intensity dependence in the vertical plane have been traced to these modes, placing a fundamental limitation on vertical beam position stabilization. Experiments were conducted suppressing these modes on a test vacuum chamber. These experiments were simulated with Mafia [1] and Microwave Studio [2], confirming experimental results. We will describe the measurements, simulations, and prototype test results.

The BSP-100 beam position monitor (BPM) was commissioned and installed at the Advanced Photon Source (APS) in a fraction of the ring as an upgrade to the present turn-by-turn BPMs. Keeping the same rf front end of the present BPMs, the BSP-100 BPM adds a high-speed analog-to-digital converter and uses a field-programmable gate array (FPGA) to perform the signal processing. The main advantage of the new system is a much better signalto-noise ratio as all the bunches in the stored beam can now be (selectively) sampled each turn. The implementation requires a much more complex timing control. We report on the high-level software that controls, saves, restores, and compares the timing of the BSP-100 BPM. This software uses Tcl/Tk for the graphical user interface, the SDDS Toolkit for data processing, and SDDS-EPICS compliant tools for saving and restoring.

bstract The Advanced Photon Source (APS) monopulse beam position monitor (BPM) system, designed to measure singleand multi-turn beam positions, is one of three BPM systems currently in use to measure and control both AC and DC orbit motions. Recently, one sector of the monopulse BPM system was upgraded by replacing its 1992-era 12-bit signal conditioning and digitizing unit (SCDU) with a field-programmable gate array (FPGA)based system for signal processing. The system consists of a repackaging of the broadband rf receiver modules together with a VME Extensions for Instrumentation (VXI) form factor housing eight 14-bit digitizers and one FGPA. The system will be described in detail, including an overview of its new functionality, and performance will be discussed. Of particular interest is the noise floor, which will be contrasted with the p

A real-time feedback double-sector controller (RTFB DSC) for the APS Upgrade has been under design for the past year. Using the Xilinx Zynq-7000 All Programmable System on a Chip FPGA residing on the ZC706 board as the base platform, the upgrade path interfaces to the existing accelerator system and modernizes the beam position monitoring and feedback systems. The modernized system increases the RTFB system sample rate from 1.5 kHz to 22.6 kHz. We report the plan for sector-by-sector upgrades that will occur during system shutdowns and allow the upgraded sectors to operate with the existing sectors. The mapping of the RTFB DSC architecture is shown utilizing the targeted FPGA features. These features include the dual ARM Cortex A9 processors, multi-port DDR3 memory controllers, gigabit transceivers, and the programming logic interconnect for implementing advanced orbit feedback controller algorithms using floating-point DSP operations. The RTFB DSC FPGA architecture is revealed as well as subsequent progress on the chassis implementation.