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Simulation Standards and Interfacing

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  1. Aims: Do we need this at all? Define the accelerator description format Interfacing procedure (bds-detector, linac-bds,etc.) Common ILC repository Simulation Standards and Interfacing

  2. Introduction. Accelerator description format (Agapov) ILC Repository (Glen White) Tools and Modeling for Collimator Studies (Andre Sopczak) Detector-IR interfacing (John Carter) Discussion Agenda Sopczak

  3. Simulation tools: GEANT,MARS,STRUCT,MERLIN, BDSIM, MAD,DIMAD,TURTLE,..... Integration of international collimation and background studies Integration of repositories Motivation

  4. Optics repository SLAC Detector description (Mokka), Mokka-Geant interface Software repository Zeuthen (not complete) Simulation database (QMUL) Need for common accelerator specification Where we are

  5. Standard elements: drift, sbend, etc. Inherit MAD functionality Geometry specification Field specification Beam (and background) distribution specification Run control Accelerator description format requirments

  6. David Sagan's AML http://www.lns.cornell.edu/~dcs/aml/ Nick Walker's specification XML option

  7. <?xml version="1.0" encoding="utf-8"?> <?xml-stylesheet type="text/xslt" href="Accelerator-ML.xsl"?> <?DOCTYPE Accelerator SYSTEM="Accelerator-ML.dtd"?> <!-- Lattice definition--> <AcceleratorDescription> <Section name="FODO" l="10m" tag="FODO Cell"> <QF type="QFA" l="1m" k="1" aperture="10cm" tilt="0.1deg"></QF> <Drift l="1m"></Drift> <QD type ="QDXX"></QD> <Drift l="1m"></Drift> <QF></QF> </Section> <Accelerator> <Section></Section> </Accelerator> </AcceleratorDesctiption> XML example

  8. <?xml version="1.0" encoding="utf-8"?> <!-- ---------------------------------------------- Accelerator markup language DTD Draft, (C) Ilya Agapov agapov@pp.rhul.ac.uk -------------------------------------------------- --> <!-- --------- Entities --------- --> <!ENTITY % bool "(true|false)"> <!-- --------- Accelerator definition --------- --> <!-- The root element. --> <!ELEMENT AcceleratorDefinition (BeamLine+,Element+)> <!-- Accelerator attributes--> <!ATTLIST AcceleratorDefinition Name CDATA #REQUIRED XML dtd

  9. Problems Not yet defined No parser Need to convert existing decks XML

  10. Preserve (possibly) the MAD (MAD-X) lattice description Take out some control commands Provide some additional geometry- and material-related stuff Provide drivers to geometry and field description formats (CAD) flex/bison parser Implemented in BDSIM Can be changed to XML GMAD format

  11. Elements: <name> : <type>,attribute=<attr_val>, attribute=<attr_val>,...; Commands: include <filename>; use,period=<name>; ... Beam parameters: beam, attribute=<attr_val>,...; Options: option, attribute=<attr_val>,...; GMAD specification

  12. Element types: marker,drift, sbend,rbend,quadrupole,sextupole,octupole, solenoid,multipole,coord_transform, rcol,ecol,element Commands: use, gas, beam, sample GMAD specification

  13. include atf_optics.gmad; include options.gmad; beam, particle="e-", energy=1.5405110 * GeV, nparticles=1e+10, distrType="gauss", sigmaX=0.01*mm, sigmaY=0.01*mm, sigmaXp=0.001, sigmaYp=0.001; use ,period=ext; sample, range = startl; !sample, range = endl; option,turnInteractions=1,ngenerate=100; GMAD example (atf 2)

  14. ! standard options for bdsim option, beampipeRadius = 10 * cm, boxSize = 1.9 * m, tunnelRadius= 2.0 * m, beampipeThickness = 1 * cm, chordStepMinimum = 0.0000000001 * m, deltaIntersection = 0.00000001 * m, deltaChord = 0.001 * m, lengthSafety = 0.00001 * m, thresholdCutCharged = 1 * MeV, thresholdCutPhotons = 1 * KeV; option,turnInteractions=1; option,ngenerate=10; GMAD example (continued)

  15. ! kickers ; akick := 0.0025 ;!half-angle ; ke1x_1 : sbend, l=0.25, angle=akick, e1=0, fint=0.5, fintx=0 ; ke1x_2 : sbend, l=0.25, angle=akick, e2=2*akick, fint=0, fintx=0.5 ; ke2x_1 : sbend, l=0.25, angle=akick, e1=akick, fint=0.5, fintx=0 ; ke2x_2 : sbend, l=0.25, angle=akick, e2=akick, fint=0, fintx=0.5 ; * * * ! sextupoles ; lfftbsextupole := 0.1 ; S2 : sextupole, l=lfftbsextupole/2, aper=(2.13*0.0254)/2 ; S1 : sextupole, l=lfftbsextupole/2, aper=(1.38*0.0254)/2 ; GMAD example (continued)

  16. colli : element,l=1*m,geometry="gmad:colli.geo", bmap="gmad:e1.bmap"; file colli.geo : Tubs { x0=0, y0=0, z0=0, rmin=6, rmax=600, z=400 material="Al", phi0=0, dphi=360, temperature=300 } GMAD example (continued)

  17. Wakefields Taylor maps Acceleration (time-varying field specification) Interfacing to CAD tools GMAD open issues

  18. VO 'ilc' supported – RHUL, QMUL, DESY Software packages have to be installed on all nodes - suggestions? Grid update

  19. Goals ?

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