Deb Kerstiens (11/26/2001) - 1

Advanced Accelerator Applications (AAA)Advanced Accelerator Applications (AAA)

Low Energy Demonstration AcceleratorLow Energy Demonstration Accelerator

(LEDA)(LEDA)

Deb Kerstiens (11/26/2001) - 2

LEDA Status

Advanced Accelerator Applications—Low Energy Demonstration Accelerator

Recently completed the Beam Halo Experiment

Fielded new systems Magnets on Halo beamline New wire scanner and halo scraper mechanisms and software Vacuum for halo beamline

Successful data acquisition Data analysis shows good correlation with models Verification of halo leads to questions about why More to come…

As of last week, future uncertain but bleak

Deb Kerstiens (11/26/2001) - 3

LEDA Beam Halo Challenges

Diagnostics Wire scanner / Halo scrapers LabView -> EPICS Automated scans and scrapes through EPICS sequence/OPI

Magnets 52 magnet latticeon Halo beamline

4 quadrupole singlets 48 quadrupole bulks/ 6 bulk supplies with 8 shunts

Field Point I/O Ethernet IP LabView-> EPICS

Control System Integration Run permit

Operations support Many different systems Support systems, data taking, EPICS, UNIX, Labview, all tools

Deb Kerstiens (11/26/2001) - 4

Control System for the LEDA 6.7-MeV Proton Beam Halo Experiment

Ethernet (Channel Access)

Consoles,Control Room

Server(File Server, Archiver, ….)

GPIB2 Bus

PLC

FP

LAN

…

FP

FP

…

GPIB-IOC Field-Point-IOC

Steerer PS

Quads PSVacuum System

Stepper Motor-IOC

Diagnostic Control

VXI-IOCs

Bea

m S

top

Injectorand

LEBTHEBTHALORFQ

High PowerRF Systems

Wav

e G

uid

e

Deb Kerstiens (11/26/2001) - 5

LEDA Lessons Learned

Fielding new hardware in an upgrade Behind schedule When it doesn’t work

No local experts or support

Let the engineer program it LabView is “easy” but

All programs are different Novice vs. expert

More layers to debug No revision control Guess who gets called

Control System Integration Run permit

vxStats Can’t guarantee run permit when you don’t have into

Archiving, time stamps

Operational Support Communication Teamwork/support

Deb Kerstiens (11/26/2001) - 6

LEDA Lessons Learned

“Maintenance nightmare” Many different systems

few people to support them Need to call “experts” to troubleshoot

Revision control No consistency Can’t enforce

What Worked Well: Operations support

Assigned, on-call Responsive

ELOG Archiving Standard EPICS systems