Difference between revisions of "OWG meeting 15-Feb-2008"
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** Design event display by Mar 2009 | ** Design event display by Mar 2009 | ||
** Master trigger design by Aug 2009 | ** Master trigger design by Aug 2009 | ||
| − | * Introduction to EPICS - Matt Bickley | + | * Introduction to EPICS (see [[Media:EPICSforHallD.ppt]]) - Matt Bickley |
| − | * Introduction to ATCA - Chris Cuevas | + | * Introduction to ATCA (see [[Media:Chris_ATCA_15Feb08.ppt]])- Chris Cuevas |
* [[Online_Design_Goals|Online Design Goals]] and [[Online_Major_Milestones|Online Major Milestones]] now include Electronics - Fernando, Elliott | * [[Online_Design_Goals|Online Design Goals]] and [[Online_Major_Milestones|Online Major Milestones]] now include Electronics - Fernando, Elliott | ||
* [[Online Action Items]] | * [[Online Action Items]] | ||
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| − | '''R& | + | '''R&D and PED Status''' |
| − | D and PED Status''' | + | |
| − | * Graham reported he is almost done with the event management unit design document. He will give a presentation on this in about a month. | + | * Graham reported he is almost done with the event management unit (EMU) design document. He will give a presentation on this in about a month. |
* Chris reviewed progres on many P3E tasks, some still have no one working on them | * Chris reviewed progres on many P3E tasks, some still have no one working on them | ||
* Subsystem review is in May | * Subsystem review is in May | ||
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'''Introduction to Epics''' | '''Introduction to Epics''' | ||
| − | Matt Bickley, head of the Accelerator Division Controls Group, gave a very nice introduction to EPICS and its use at JLab. Some highlights: | + | Matt Bickley, head of the Accelerator Division Controls Group, gave a very nice introduction to EPICS (see [[Media:EPICSforHallD.ppt]]) and its use at JLab. Some highlights: |
* EPICS is a toolkit developed in the late 1980's at LANL and ANL | * EPICS is a toolkit developed in the late 1980's at LANL and ANL | ||
| Line 58: | Line 57: | ||
* can subscribe to or poll CA channels | * can subscribe to or poll CA channels | ||
* "records" in front-ends have numerous properties, can control hardware and process hardware values | * "records" in front-ends have numerous properties, can control hardware and process hardware values | ||
| − | * records can also perform | + | * records can also perform calculations, cause other records to be processed, etc. |
* an EPICS "database" is a collection of records on a front-end controller | * an EPICS "database" is a collection of records on a front-end controller | ||
* database records defined in ASCII files, but can use GUI tools to auto-generate ASCII (CapFast, VDCT) | * database records defined in ASCII files, but can use GUI tools to auto-generate ASCII (CapFast, VDCT) | ||
Latest revision as of 15:10, 27 February 2008
Contents
Agenda
- Review of minutes from 31-Jan-2008 meeting
- Brief status of electronics, trigger, DAQ, etc. work related to R&D and PED deliverables. See also Online_Major_Milestones. See the complete P3E schedule for details. Major Trigger/DAQ/Monitoring/Controls deliverables are:
- Design monitoring system by Jul 2008
- Preliminary energy-sum and master trigger designs by Sep 2008
- Prototype staged/parallel event builder by Sep 2008
- Design alarm system by Sep 2008
- Design experiment control system by Sep 2008
- Design event display by Mar 2009
- Master trigger design by Aug 2009
- Introduction to EPICS (see Media:EPICSforHallD.ppt) - Matt Bickley
- Introduction to ATCA (see Media:Chris_ATCA_15Feb08.ppt)- Chris Cuevas
- Online Design Goals and Online Major Milestones now include Electronics - Fernando, Elliott
- Online Action Items
Time/Location
2pm Fri 15-Feb-2008 CC F326
Announcements
Next Meeting
Fri 29-Feb-2008 2pm CC F326
New Action Items from this Meeting
Minutes
Attendees: Matt Bickley, Simon T, Mark I, Elton S, Chris C, Elke A, David L, Graham H, Alex S, Vardan G, Dave A, Elliott W
R&D and PED Status
- Graham reported he is almost done with the event management unit (EMU) design document. He will give a presentation on this in about a month.
- Chris reviewed progres on many P3E tasks, some still have no one working on them
- Subsystem review is in May
Introduction to Epics
Matt Bickley, head of the Accelerator Division Controls Group, gave a very nice introduction to EPICS (see Media:EPICSforHallD.ppt) and its use at JLab. Some highlights:
- EPICS is a toolkit developed in the late 1980's at LANL and ANL
- over 100 institutions in the EPICS collaboration
- has been growing since then, used all over the world
- has "tech-talk" newsgroup, usually get answers quickly
- core architecture responsibility of about 10 people at LANL and ANL
- tools developed by community
- interprocess communication done by Channel Access (CA) package (UDP discovery, TCP communications)
- CA has flat, global name space, supports many data types and many languages
- can subscribe to or poll CA channels
- "records" in front-ends have numerous properties, can control hardware and process hardware values
- records can also perform calculations, cause other records to be processed, etc.
- an EPICS "database" is a collection of records on a front-end controller
- database records defined in ASCII files, but can use GUI tools to auto-generate ASCII (CapFast, VDCT)
- IOC's (input-output controllers) are the front-end computers that process database records
- IOC's can run with many operating systems (VxWorks, Linux, RTEMS)
- "device support" and "driver support" libraries enable generic record to access particular hardware on a particular IOC
- Many CA-compatible tools/packages exist, more created each day (archivers and viewers, alarm systems, strip charts, etc.)
- many hardware vendors supported on VME, less on Linux, drivers usually written by users, but occasionally by vendor
- Portable CA server (PCAS) can interface to anything
- "Soft-IOC" can process records, but may have no connection to hardware
- many display packages, EDM used at JLab, but also Control System Studio from DESY
- many new Java utilities being developed, including Java PCAS
- Accelerator has 350k records, 50k control points
Note...whatever supervisory layer Hall D chooses, it must be compatible with EPICS so that we can inter-operate with the accelerator control system
- Some problems: learning curve, new device support, EPICS future support, new operating systems and device support, role of web interfaces, etc.
ATCA
- Chris described ATCA, a crate/backplane standard widely used in the telecom industry
- ATCA may be a great choice for our global trigger crate (just one crate)
- ATCA is better established than VXS for the kind of backplane communication needed in this crate
- ATCA crate is 8U high (vs 6U for VXS)
- many vendors for ATCA
- 14 slots ("shelves") per crate
- 200 W power/shelf ok
- includes EMC, cooling, etc.
