Converting PROSCAN CS to EPICS

Status

Damir Anicic, Paul Scherrer Institute, Villigen, Switzerland

For EPICS collaboration meeting 2008, Shanghai, 10-14 March 2008

What is PROSCAN?• Medical facility for tumor treatment

• First beam 01.12.2006• Patient treatment since 01.06.2007• GANTRY1 in operation• New OPTIS soon• GANTRY2 patients in 2009• Experiment (PIF) area in use

• In-house developed ACS CS• Conversion to EPICS in progress

• Gantry1 operation and OPTIS tests during working hours

• PIF on most nights/weekends• => No time to test EPICS available

COMET: Compact Medical Therapy Cyclotron

Diameter = 3.2 m, Weight = 90 t, Power-consumption = 300 kW, Superconducting

Energy = 250 MeV Protons

Facts

• Project start 01.04.2007• Delayed to 01.06.2007 because of GANTRY1

• One person for IOCs (drivers,templates,…), 100%• One person for DataBase, up to 50%• One person for Workstation applications, up to 30%

Facts (2)• 104 Magnets

• 54 Digital I/O

• 1 Degrader

• 22 „Digitizer“

• 91 Harps (profile monitors)

• 88 Current measurements++

• 110 RPS (Interlock)

• 7 Motors

• 22 High Voltage Sources

• 48 Vacuum devices - PLC

• 284 COMET devices - PLC

• 116 Virtual

• 350 VME boards or IP modules on 21 IOCs

How to migrate to EPICS

• Keep naming conventions• Base on same principle (IOCs do simple I/O)• Make “workstation-apps” talk EPICS-CA• Adjust MEDM screens• Use existing EPICS drivers, implement missing• Create required templates• Implement driver-configs, substitution files• All data (templates/substitutions/driver-configs)

in DB

How to do that?• KISS-principle : Keep It Simple and Stupid

– Just do it, simple and as fast as possible

• Find time to test it (Saturday, 01.03.2008 first try)

• Correct mistakes, implement what was forgotten and go to previous step unless all done and OK

What has been done

• 11 drivers

• 3 record types

• 4 genSubs

• 50 MEDM adl files adjusted

• 10 Applications converted to CA

What has been done (2)

• 52 templates

• 365 driver configs

• 1009 template substitutions

• 35628 records created

What happened on March 1st

• Boot 20 EPICS IOCs (all but one)• One did not start, unplug one card, starts• Many wrong driver configs detected and

corrected• No single digital I/O worked (driver config mix-up

diagnosed)• We forgot to implement Waveform template

substitutions (91), few added to test it• First try was declared a success

What’s next

• Second try end of March (probably)– Detect and correct any errors– We’ll try to get the beam up

• On later trials– Convert other applications (Beam Allocator is crucial)– Do dummy-irradiations together with medical group

• Switch to EPICS in Jun 2008 (?)

That’s all Folks!

We are all GENIUS!