Spallation Neutron Source

Interface Control Document

1.5.6.1 Ring High Level RF System

and

1.9.5 Ring Controls

![](media/image1.png)

105060100-IC0001-R0A

February 2002

**Approvals**

> 1.5.6.1 High Level RF System 1.9.5 Ring Control System

Group Leaders: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Alexander Zaltsman John Smith

Spallation Neutron Source

Interface Control Document

Ring High Level RF System

and

Integrated Control System.

Prepared by

Johnny Tang (Editor)

Brookhaven National Laboratory

SNS Project

UT-Battelle, LLC

managing

Spallation Neutron Source activities at

  -------------------------------------- --------------------------------
  Argonne National Laboratory            Brookhaven National Laboratory

  Thomas Jefferson National Accelerator  Lawrence Berkeley National
  Facility                               Laboratory

  Los Alamos National Laboratory         Oak Ridge National Laboratory
  -------------------------------------- --------------------------------

under contract DE-AC05-00OR22725

for the

U.S. Department of Energy

CONTENTS

1\. Scope [5](#scope)

2\. Overview [5](#overview)

3\. VME Interface Options [5](#vme-interface-options)

3.1. Blue Hose Interface [5](#blue-hose-interface)

3.2. Ethernet Interface [5](#ethernet-interface)

3.3 ControlLogix gateway [6](#controllogix-gateway)

4\. Performance Requirement [6](#performance-requirement)

Appendix A. Bit Definitions [11](#appendix-a.-bit-definitions)

Appendix B. Schedule [14](#appendix-b.-schedule)

References [15](#references)

#   {#section .unnumbered}

# Scope 

This document provides the interface requirements between the Ring high
level RF (HLRF) system and the Integrated Control System (ICS).

This document is intended to be a guideline for the design of SNS Ring
high level RF control system.

This document may be modified as a change request to the control system.
Proposed changes require Ring HLRF System and ICS review and approval.

# Overview

The Spallation Neutron Source (SNS) consists of a front-end system, a
linear accelerator, an accumulator ring, and mercury target. The
front-end system produces a beam of H ^--^ ions and injects it at 2.5
MeV into a following linear accelerator for further acceleration to 1
GeV. The accumulator ring has circumference of 248 meters that is
designed to accumulate 2x 10 ^14^ , 1 GeV protons in 1 ms, via charge
exchange injection of H ^--^ beam. After the accumulation, the beam is
extracted using a fast kicker magnet and sent to the mercury target. The
purpose of the accumulator ring RF system is to maintain a 250ns gap for
the 200ns rise time of the extraction kicker while maintaining low peak
beam current and large momentum spread.

The design of SNS Ring RF system is a dual harmonic system running with
h=1 and h=2 which imply RF frequencies of f1 = 1.05 MHz and f2 = 2.11
MHz. Three cavities will be used for h=1 system, with two gaps per
cavity and 10kV per gap. There will be one power amplifier per cavity to
compensate the heavy beam loading at h=1. The h=2 RF system will consist
of one cavity with two gaps at 10kV per gap, driven by a single power
amplifier.

An Allen-Bradley PLC-5 will be used for SNS Ring High Level RF controls.
Two dedicated RIO ports on the PLC will be used for two RIO buses, each
bus to control two cavity systems via RIO and Flex I/O interface.
Several REDI Panels will be installed on each of the RIO buses. Another
dedicated DH+ port on the PLC will be used for a local PC running RS
View or PLC programming. See figure 1, a proposed architecture for SNS
ring high-level RF system.

# VME Interface Options

There are three options that could be used to interface between SNS
global ICS and Ring high level RF system, Blue Hose interface, Ethernet
interface and ControlLogix gateway.

## Blue Hose Interface

The Allen-Bradley VMEbus remote I/O scanner modules (6008-SVnR) allow a
VME master processor (IOC) direct access to I/O adapter devices on the
Allen-Bradley Universal Remote I/O link. The VMEbus I/O scanner modules
provide up to 230.4k bit/s communication and continuous block-transfers.
1771-DCM PLC direct communication module provides a remote I/O adapter
port for a local PLC processor (Ring High Level RF PLC) to communicate
with a remote I/O scanner port of a supervisory processor (IOC) across a
remote I/O link. Figure 2 shows the Blue Hose interface between IOC and
PLC-5.

## Ethernet Interface

The Allen-Bradley 1785-ENET Ethernet Interface Module provides an
Ethernet port for a 1771-platform PLC-5 processor, so that it can
communicate with IOC via Ethernet link. Figure 3 shows this interface
option.

## 3.3 ControlLogix gateway {#controllogix-gateway .unnumbered}

A ControlLogix 5550 can be used as a gateway between DH+ Network and
Ethernet. See figure 4.

# Performance Requirement

There are about 500 bits per cavity system or total of 2k bits data will
be transferred from PLC to VME IOC. As a minimum requirement, the update
rate on operator screens shall be at least once every 5 seconds.

The detailed bits definition information along with their names, units,
alarm ranges, and the descriptions of the bits is in Appendix A.

![](media/image2.jpeg){width="6.25625in"
height="4.252777777777778in"}**Figure 1. Ring High Level RF Control
Architecture**

**Figure 2. Blue Hose Interface Between IOC and RF PLC**

##   {#section-1 .unnumbered}

## Figure 3. Ethernet Interface Between IOC and RF PLC

![](media/image3.jpeg){width="6.0in" height="7.189583333333333in"}

**Figure 4. Logix 5550 Gateway Configuration**

![](media/image4.jpeg){width="6.502083333333333in"
height="8.169444444444444in"}

# Appendix A. Bit Definitions {#appendix-a.-bit-definitions .unnumbered}

#  {#section-2 .unnumbered}

#  {#section-3 .unnumbered}

  -------------------------- ---------------------------- ----------------------------
  ***[Type]{.underline}***   ***[Source]{.underline}***   ***[Name]{.underline}***

                                                          

                                                          

                             **Anode First Input Module** 

                                                          

                                                          

  Sink Inp                   303 #1                       HV On Status

  Sink Inp                   303 #1                       HV Inh Status

  Sink Inp                   303 #1                       Loc/Rem Status

  Sink Inp                   303 #1                       Over-Voltage Status

  Sink Inp                   303 #1                       Interlock Status

  Sink Inp                   303 #1                       Overload Status

  Sink Inp                   303 #1                       Arc Status

  Sink Inp                   303 #1                       Power Fault Status

  Sink Inp                   303 #1                       Coolant Fault Status

  Sink Inp                                                WATER LEAK

  Sink Inp                                                WATER MAT FAULT

                                                          

                                                          

                             **Anode Second Input         
                             Module**                     

                                                          

  Sink Inp                   303 #2                       HV On Status

  Sink Inp                   303 #2                       HV Inh Status

  Sink Inp                   303 #2                       Loc/Rem Status

  Sink Inp                   303 #2                       Over-Voltage Status

  Sink Inp                   303 #2                       Interlock Status

  Sink Inp                   303 #2                       Overload Status

  Sink Inp                   303 #2                       Arc Status

  Sink Inp                   303 #2                       Power Fault Status

  Sink Inp                   303 #2                       Coolant Fault Status

                                                          

                                                          

                             **Anode Third Input Module** 

                                                          

  Sink Inp                   402                          HV On Status

  Sink Inp                   402                          HV Inh Status

  Sink Inp                   402                          Loc/Rem Status

  Sink Inp                   402                          Over-Voltage Status

  Sink Inp                   402                          Interlock Status

  Sink Inp                   402                          Overload Status

  Sink Inp                   Flow-1                       303 #1 Water Flow

  Sink Inp                   Flow-2                       303 #2 Water Flow

  Sink Inp                   Fan                          Control Box TC Fault

  Sink Inp                   Door                         Cabinet Access Door Inerlock

  Sink Inp                   Extnl                        Remote Interlock Link

  Sink Inp                   PLC                          PLC I/L Trip readback

                                                          

                                                          

                             **Cap Bank Module**          

                                                          

  Sink Inp                                                Crowbar circuit interlock

  Sink Inp                                                Crowbar fuse interlock

  Sink Inp                                                Overcurrent

  Sink Inp                                                Airflow fault

  Sink Inp                                                Door interlock

  Sink Inp                                                PS shorting bar

  Sink Inp                                                Crowbar OT

  Sink Inp                                                Load fault

  Sink Inp                                                Cubical OT

  Sink Inp                                                Heat Lamp interlock

  Sink Inp                                                CR6 NO C1 Dump Res

  Sink Inp                                                CR6 NC C1 Dump Res

  Sink Inp                                                CR7 NO C2 Dump Res

  Sink Inp                                                CR7 NO C2 Dump Res

                                                          

                                                          

                                                          

                                                          

                                                          

                             **PA / Cavity Interlocks &   
                             Statuses**                   

                                                          

  Sink Inp                   Local Switch                 

  Sink Inp                   Remote Switch                

  Sink Inp                   Attenuator Water Flow        

  Sink Inp                   Tube Water Flow              

  Sink Inp                   Cavity Water Left Flow       

  Sink Inp                   Tube Over-Temp               

  Sink Inp                   Cavity Over-Temp Left        

  Sink Inp                   Cavity Water Flow Right      

  Sink Inp                   Cavity Over-Temp Right       

  Sink Inp                   Cables                       

  Sink Inp                   Grid Under-Voltage           

  Sink Inp                   Filament Under-Voltage       

  Sink Inp                   Flushing Air Flow            

  Sink Inp                   Tube Air Flow                

  Sink Inp                   Screen Over-Load             

  Sink Inp                   Ross Relay Readback          

  Sink Inp                   Filament Contactor Readback  

                                                          

                                                          

                                                          

                             **Variac Interlocks**        

                                                          

  Sink Inp                   Blower Contactor Readback    

  Sink Inp                   Blower Motor Over-Load       

  Sink Inp                   Crash                        

  Sink Inp                   Filament Safety              

  Sink Inp                   Blower Under-Voltage         

  Sink Inp                   Variac Door Readback         

  Sink Inp                   Variac Low Limit             

  Sink Inp                   Variac High Limit            

  Sink Inp                   Vacuum                       

  Sink Inp                   HV Safety                    

  Sink Inp                   Bldg Crash                   

  Sink Inp                   HV READY                     

  Sink Inp                   Ross Relay Control Relay     

                                                          

                                                          

                             **Tuning PS Interlocks**     

                                                          

                                                          

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                

  Sink Inp                                                
  -------------------------- ---------------------------- ----------------------------

#  Appendix B. Schedule {#appendix-b.-schedule .unnumbered}

  ------------------ ----------------------------------------------------
  **Dates**          **Activities**

  03/31/02           Preliminary Ring High Level ICD.

  ?                  Final Ring High Level ICD

  04/01/04 --        Ring High Level RF system commission
  09/30/04           

  10/01/04 --        Ring RF system integration
  09/30/05           
  ------------------ ----------------------------------------------------

#  References {#references .unnumbered}

1.  Spallation Neutron source Design Manual June 1998

2.  Allen-Bradley & Rockwell Software, Inc Product Catalogs