Designing a Magnetic Measurement Data Acquisition and Control System with Reuse in Mind: A Rotating Coil System Example

Accelerator magnet test facilities frequently need to measure different magnets on differently equipped test stands and with different instrumentation. Designing a modular and highly reusable system that combines flexibility built-in at the architectural level as well as on the component level addresses this need. Specification of the backbone of the system, with the interfaces and dataflow for software components and core hardware modules, serves as a basis for building such a system. The design process and implementation of an extensible magnetic measurement data acquisition and control system are described, including techniques for maximizing the reuse of software. The discussion is supported by showing the application of this methodology to constructing two dissimilar systems for rotating coil measurements, both based on the same architecture and sharing core hardware modules and many software components. The first system is for production testing 10 m long cryo-assemblies containing two MQXFA quadrupole magnets for the high-luminosity upgrade of the Large Hadron Collider and the second for testing IQC conventional quadrupole magnets in support of the accelerator system at Fermilab

Strength and shape of the magnetic field of the Fermilab main injector dipoles

Measurements of 230 6-meter and 136 4-meter dipoles constructed for the Fermilab Main Injector were carried out as part of the magnet production effort. An automated measurement system provided data on magnetic field strength and shape using several partially redundant systems. Results of these measurements are available for each individual magnet for use in accelerator modelling. In this report we will summarise the results on all of the magnets to characterise the properties which will govern accelerator operation

Software For A Database-Controlled Measurement System At The Fermilab Magnet Test Facility

A software system has been developed for use in measuring the magnetic properties of accelerator magnets at the Fermilab Magnet Test Facility. Key features of the system include: # Storage of measurement data in a relational database. # Use of database tables to define the individual steps that occur during a measurement. # Use of an "electronic logbook" to store an historical record of important measurement details within the database. # A graphical user interface for measurement technicians and data analysts to use in acquiring and analyzing data. Other papers describe the preliminary software design [1], the design of the database tables [2], and the results of measurements obtained using this system [3] [4]. This paper describes the final software system design, with particular emphasis on the data acquisition subsystem. Currently, the system supports 3 test stations and has been used to measure approximately 85 magnets. It is used for both production measurements and R & ..

Magnetic Field Measurements Of The Initial Fermilab Main Injector Production Quadrupoles

A large sample of the 2.54-meter quadrupoles for lattice matching in the Fermilab Main Injector have been fabricated and measured. The resulting properties are reported and compared to the accelerator requirements. I. Magnet requirements The Fermilab Main Injector is a new proton and antiproton accelerator currently under construction at Fermi National Accelerator Laboratory. It will replace the existing Main Ring in all functions. While many of the quadrupoles used in the Main Injector will be reused from the Main Ring, the lattice requires some new quadrupoles of the same design but different lengths (2.54 m and 2.96 m, compared to 2.13 m for the Main Ring quads) to run on the same busses. The performance requirements of the quadrupoles have been studied extensively [1] [2] [3]. The two significant areas of magnetic performance are the magnet-to-magnet variation in the integrated magnetic field ("strength") and the variation of the strength as a function of transverse position ("sh..