Digital Interface for MCOR’s Stan Cohen Albuquerque, NM From the June 9, 2005 presentation by Dr. Stan Cohen - notes on slides 11 and 12 added by Paul Bellomo

MCORS & LCLS2 Anatomy of an MCOR System

MCORS & LCLS3 Using the MCOR System for LCLS Corrector Power Supplies High density – 8/16 Channels per crate Use of a mature design for correctors Minimal growth in the variety of spares needed in inventory Flexibility in DC bulk power supply choice Require high precision/low noise digital interface for monitor and control

MCORS & LCLS4 Separate Interface Card One can deploy a new interface card with a new control protocol without changing anything else in the system! Topology of the interface control card is not tightly coupled to the bipolar switcher cards Interlock requirements may be different from SPEAR III

MCORS & LCLS5 LANSCE Topology – The need to fit into the existing control system

MCORS & LCLS6 Add Ethernet Connectivity and Mate to LCLS or SPEAR Control System

MCORS & LCLS7 LANTRONIX Micro-board – Straight-forward Connection to Simple Differential Serial Bus Ethernet RJ45 (10BASE-T) connector TTL data interface Two (2) serial ports Accepts 5V regulated input power Internal web server, Serial, Telnet and SNMP management Flash ROM for easy software upgrades

MCORS & LCLS8 And Now a Word from My Sponsor

MCORS & LCLS9 is working on a bunch of stuff… PXI bus HV modules – Bira Partnering with N.I. Bulk power supplies for MCORs User interface - Custom touch panel embedded processors Power supply control and interfacing using micro PLC’s Power factor and phase identification Rack monitoring Things that we haven’t thought of yet

MCORS & LCLS10 Target Illumination at the SNL Z-Machine …and this is kind of neat The led strip is vaporized with each shot.

MCORS & LCLS11 Notes below added by Paul Bellomo of SLAC 1.Development of the Ethernet Controller is essentially a packaging effort that is estimated to take 2 to 3 months 2.Each controller is expected to cost about $2,000. This does not include non-recurring costs for the re-packaging. 3.If SLAC were to buy 160 MCOR12s for the SCOR6 replacements funds could be siphoned from the profits to do the re-packaging 4.The controller has a 16-bit DAC, but BiRa is looking 20-bit DACs. 5.The current 16-bit DAC has a 5ppm reproducibility, a 10ppm/C temperature coefficient, 2 kHz to 10kHz bandwidth and a settling time (unrecorded) 6.Its microprocessor runs at 20MHz 7.Stan (BiRa) would provide the programming and software 8.Antonio de Lira suggested an RS232 port for local control by a PC 9.Stan was asked about paralleling MCO12s and MCOR30s. The MCOR12 is a voltage source and cannot be easily paralleled. The MCOR30 is a true current source and can be paralleled. Continued on the next slide

MCORS & LCLS12 Notes below added by Paul Bellomo of SLAC 10.If an MCOR30 is used in parallel, say for the LCLS, the second unit would be in standby mode. If the first supply failed the second would be turned on. Although there would be some downtime, the MTTR would be reduced from a present 2 hours to perhaps a minute or two. 11.The MCOR12 and MCOR30 have analog PI controllers built into each board. The new Ethernet controller has a DAC for the MCOR reference signal. In the case of the SPEAR 3 MCOR30s which have a removable DAC, the DAC could be abandoned if desired. 12.In addition to the Ethernet controller, Stan also displayed BiRa’s new PSC-636 power supply controller. It is housed in a 3U high, standard 10” rack-mount chassis. It functions as a regulator, user interface, and contains the power supply state-machine logic 13.Stan displayed LED lighting that is very bright and programmable and a mini-PLC (manufacturer unrecorded) 14.Stan went to GMW to look at their new, very small Danfysik 200A current transductors. These could fit into a rack-mounted intermediate power supply. See the GMW website for details 15.GMW (Danfysik) is also selling 5 to 16kW intermediate power supplies with 25ppm current stability