The scale and performance parameters of the ILC require new thinking in regards to control system design. This design work has begun quite early in comparison to most accelerator projects, with the goal of uniquely high overall accelerator availability. Among the design challenges are high control system availability, precision timing and rf phase reference distribution, standardizing of interfaces, operability, and maintainability. We present the current state of the design and take a prospective look at ongoing research and development projects.

A new superconducting radio frequency (SRF) cavities test facility is now operational at Fermilab's Meson Detector Building (MDB). The facility is supplied cryogens from the Cryogenic Test Facility (CTF) located in a separate building 500-m away. The design incorporates ambient temperature pumping for super-fluid helium production, as well as three 0.6-kW at 4.5-K refrigerators, five screw compressors, a helium purifier, helium and nitrogen inventory, cryogenic distribution system, and a variety of test cryostats.To control and monitor the vastly distributed cryogenic system, a flexible scheme has been developed. Both commercial and experimental physics tools are used. APACS+ ™ , a process automation control system from Siemens-Moore, is at the heart of the design. APACS+ ™ allows engineers to configure an ever evolving test facility while maintaining control over the plant and distribution system. APACS+ ™ nodes at CTF and MDB are coupled by a fiber optic network. DirectLogic205 PLC's by KOYO ® are used as the field level interface to most I/O.The top layer of this system uses EPICS (Experimental Physics and Industrial Control System) as a SCADA/HMI. Utilities for graphical display, control loop setting, real time/historical plotting and alarming have been implemented by using the world-wide library of applications for EPICS.OPC client/server technology is used to bridge across each different platform. This paper presents this design and its successful implementation.

Abstract. Fermilab's new Recycler Ring will recover and cool "used" antiprotons at the end of a Tevatron store and also accumulate "new" antiprotons from the antiproton source. A wideband rf system based on barrier buckets will result in unbunched beam, grouped in one to three separate partitions throughout the ring. A new beam position monitor system will measure position of any one partition at a time, using low-frequency signals from beam distribution edges. A signal path including an elliptical split-plate detector, radiation-resistant tunnel preamplifiers, and logarithmic amplifiers, will result in a held output voltage nearly proportional to position. The results will be digitized using Industry Pack technology and a Motorola MVME162 processor board. The data acquisition subsystem, including digitization and timing for 80 position channels, will occupy two VME slots. System design will be described, with some additional emphasis on the use of logamp chips.

A VME based d a m acquisition system has been designed and installed for use in the new 400 Mev line connecting the Linac and Booster at Fermilab. Position information is digitized at rates up to 5 MHz during the entire beam pulse. Triggering can be accomplished by any of several mechanisms, including beam synchronized clock events, Tevatron clock events or an external trigger based on the chopper power supply trigger. Scaling and averaging are done locally. The results are returned to the ACNET control system via the Token Ring network.

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