RF Controls Oct 18 2017

RF Controls Meeting Notes – 18 October 2017

Architecture

Each cryomodule requires 2 racks of RF equipment. Each cryomodule rack pair interfaces to EPICS via a single CPU. Each rack pair utilizes a local private network for internal communication between the RF CPU, the RF electronics chassis, and the Cryo system PLC network. A single terminal server will be used for console access to the 2 RF CPUs.

Each rack contains 4 electronics chassis, each of which requires a network connection to the new LERF VLAN for purposes of firmware management.

Each CPU requires a single connection. Each SSA (one per cavity) requires a single connection.

CPU connections: 1 per CPU 1 x 2 2

Electronics connections: 4 per rack 4 x 4 16 SSA connections: 1 per cavity 1 x 16 16

Total: 34 Ethernet connections

Figure 1: RF connections to LERF VLAN

To be determined:

• Locations of RF CPUs

• Routing of Cryo PLC connections to CPUs

• Location of terminal server

Software

The RF CPUs run the LinuxRT operating system and host many EPICS IOCs. These IOCs interface to the RF rack electronics via the local private network. Most of the RF software functionality resides in these IOCs. The SSAs are controlled by IOCs running on the LERF application server.

To be determined: ==

• List of applications and functionality still to be ported from external scripts, etc. to EPICS

• Software development scheme between LERF and CEBAF

• IOC-to-SSA ratio

Responsibilities

SLAC Provides

• 2 network switches for the RF local private networks

• Fully configured LinuxRT CPUs

JLab Provides

• Terminal server for console access to the two RF CPUs