1 / 9

Real time

Real time. 4 meetings so far. Consensus: Real-time will be required to operate the LHC. The demands on speed appear to be reasonable, and data acquisition, or measure & correct appear to be necessary at a maximum of 10 Hz. Bandwidth requirements are also moderate.

evonne
Download Presentation

Real time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Real time • 4 meetings so far. • Consensus: Real-time will be required to operate the LHC. • The demands on speed appear to be reasonable, and data acquisition, or measure & correct appear to be necessary at a maximum of 10 Hz. Bandwidth requirements are also moderate. • Aim to provide a global real-time framework to support the multiple input, multiple output requirements foreseen.

  2. RT requirements II Response limited by PC/magnet

  3. Latencies Which should allow 10 Hz

  4. Control: assumptions • Snap-back and low energy provide the challenge • Nominal is the worse case... • The “multipole factory” takes care of at least 80% of the effect i.e. • magnetic measurements • non-linear models • on-line reference magnets • Characteristic frequency of snap-back slow & not changed by feed-forward from “multipole factory” • Corrections to: • horiz. orbit correctors (b1) & tuning quads. (b2) • sextupole (b3) and decapole (b5) spool pieces 70 s Characteristic frequency is low

  5. Reference magnets SM18 Magnet Test Benches WorldFIP fieldbus Instrumented Magnet C Power Converter FB I MCCS Gateway Multipoles Factory DB 3-10Hz Real-time LHC controls network Real-Time LHC Control System

  6. Power Converters • Major system - all magnets - set, ramp, trim etc. etc. Offering RT control at 100 Hz (whether you need it or not!) • Digital controllers:- CERN design, manufactured by industry. Prototypes for String II. • Gateways:- standard SL-CO - Power PC running LynxOS • Fieldbus: WorldFIP from CEGELEC • Timing: via an IRIG-B receiver card MCCS Server RT LHC Network Gateway Gateway Gateway Gateway ~80 Gateways Up to 30 Digital Controllers Per WorldFIP fieldbus ~1700 Digital Controllers

  7. Real time Beam Instrumentation and Power Converter systems are planning on providing real-time acquisition and correction from the front-ends to at least the gateway level. Ethernet by appears to be capable of providing the necessary level of performance via dedicated Gigabit Ethernet A real-time environment will be necessary at the high-level. A logical architecture is required to allow the implementation of a well-designed, integrated system A generic approach will be adopted to provide standard facilities.

  8. Logical architecture

  9. MIMO

More Related