ATF2 Layout/Lattice Options

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ATF2 Layout/Lattice Options. Coupling Correction / Emittance Diagnostics. FONT. nBPM (KEK). nBPM (SLAC). Compton / laserwire. Existing ATF Extraction Line. ODR. “Optimal” Layout (from ATF2 Proposal vol. 1). ~8 m wall to IP. Assembly Hall. chicane. 8.3 m wall to dump face - PowerPoint PPT Presentation

Transcript of ATF2 Layout/Lattice Options

  • ATF2 Layout/Lattice OptionsnBPM (SLAC)nBPM (KEK)FONTCompton / laserwireODRExisting ATF Extraction LineCoupling Correction /Emittance Diagnostics

    M. Woodley [SLAC]

  • Optimal Layout (from ATF2 Proposal vol. 1)~8 m wall to IP

    M. Woodley [SLAC]

  • 8.3 m wall to dump face(14.3 m wall to IP)Assembly Hallchicane

    M. Woodley [SLAC]

  • *x,y = 4,0.1 mm30 cm offset

    M. Woodley [SLAC]

  • new quadrupole QMX (between QF3X and BH1X.3)

    M. Woodley [SLAC]

  • SQSQSQSQWSWSWSWSWS1.01.01.01.01.70.70.70.70.71.03.03.03.09090180909090 x y552541313141262634.18.6136.36.280.410.5136.36.280.410.5 (m)EXT Skew Correction & Emittance Diagnostic Section (optimal2)4 < x/y < 22

    M. Woodley [SLAC]

  • TABLE 1: existing ATF EXT quadrupoles------------------------------------------------------------------------------power supply maximum currents from N. Terunuma email (April 22, 2005)------------------------------------------------------------------------------a note on names: the "quad name" column names the location in the beam line;the "magnet name" column names the physical magnet that presently resides ateach location; the "power supply" column names the power supply whose cablescome to that location------------------------------------------------------------------------------quad magnet magnet power Imax KLmax notesname name type supply p.s. @ 1.3 GeV----- ------- ----------- ------ ---- --------- ------------------------QD1X QD1Xmag Hitachi 2 QD1Xps 100 0.6657QD2X QD2Xmag Hitachi 2 QD2Xps 100 0.6657QF1X QF1Xmag Hitachi 2 QF1Xps 100 0.6657QK0X QK0Xmag ECUBE skew QK0Xps 20 2.7673e-4QS1X QS1Xmag ECUBE skew QS1Xps 20 2.7673e-4QF2X QF2Xmag Hitachi 1 QF2Xps 100 0.2989QD3X QD3Xmag Hitachi 5 QD3Xps 100 2.1050QF3X QF3Xmag Hitachi 5 QF3Xps 100 2.1050QF4X QF4Xmag Hitachi 5 QF4Xps 100 2.1050QS2X QS2Xmag ECUBE skew QS2Xps 20 2.7673e-4QD4X QD4Xmag Hitachi 5 QD4Xps 200 2.1050 use Imax = 100 ampsQD5X QD5Xmag Hitachi 5 QD5Xps 100 2.1050BH4X .......................................................................QF5X QF5Xmag Hitachi 5 QF5Xps 100 2.1050QK1X QK1Xmag IDX skew QK1Xps 5 2.5363e-2QD6X QD6Xmag Tokin 3393 QD6Xps 100 0.3021QK2X QK2Xmag IDX skew QK2Xps 5 2.5363e-2QD7X QD7Xmag Hitachi 5 QD7Xps 100 2.1050QK3X QK3Xmag IDX skew QK3Xps 5 2.5363e-2QF6X QF6Xmag Hitachi 5 QF6Xps 100 2.1050QK4X QK4Xmag IDX skew QK4Xps 5 2.5363e-2QD8X QD8Xmag Hitachi 4 QD8Xps 200 2.0650QF7X QF7Xmag Hitachi 4 QF7Xps 100 1.0488QD9X QD9Xmag Hitachi 4 ------ --- 2.0650 in series with QD8Xmagnetic measurements data file Imax------------------------------- -----ATF$MAG:MAG_KI_Q_HITACHI_1.FOR 140.2ATF$MAG:MAG_KI_Q_HITACHI_2.FOR 100.2ATF$MAG:MAG_KI_Q_HITACHI_4.FOR 200.4ATF$MAG:MAG_KI_Q_HITACHI_5.FOR 100.6ATF$MAG:MAG_KI_Q_TOKIN_3393.FOR 139.0ATF$MAG:MAG_KI_Q_IDX_SKEW.FOR 20.0ATF$MAG:MAG_KI_Q_ECUBE_SKEW 20.0

    M. Woodley [SLAC]

  • TABLE 2: ATF2 EXT quadrupoles ("optimal 2")------------------------------------------------------------------------------quad magnet magnet power Imax KLmax KL NOTEsname name type supply p.s. (see below)----- ------- ---------- ------ ---- --------- ------- ----------------QD1X QD6Xmag Tokin 3393 QD1Xps 100 0.3021 -0.2500 2QD2X QD2Xmag Hitachi 2 QD2Xps 100 0.6657 -0.2529QF1X QF1Xmag Hitachi 2 QF1Xps 100 0.6657 0.3554QK0X QK0Xmag ECUBE skew QK0Xps 20 2.7673e-4 0.0QS1X QS1Xmag ECUBE skew QS1Xps 20 2.7673e-4 0.0QF2X QF2Xmag Hitachi 1 QF2Xps 100 0.2989 0.2122QD3X QD3Xmag Hitachi 5 QD3Xps 100 2.1050 -0.5507QF3X QF3Xmag Hitachi 5 QF3Xps 100 2.1050 0.3238QMX QF5Xmag Hitachi 5 QF5Xps 100 2.1050 0.7293 3QF4X ------- IHEP ------ 100 2.5 2.0628 1,4QS2X QS2Xmag ECUBE skew QS2Xps 20 2.7673e-4 0.0QD4X QD4Xmag Hitachi 5 QF7Xps 100 2.1050 -1.3399 5QF5X QD5Xmag Hitachi 5 QD5Xps 100 2.1050 0.6193BH4X .......................................................................QD5X QD1Xmag Hitachi 2 QD6Xps 100 0.6657 -0.3528 2QK1X QK1Xmag IDX skew QK1Xps 5 2.5363e-2 0.0QD6X QD7Xmag Hitachi 5 QD7Xps 100 2.1050 -1.2504QF6X QF6Xmag Hitachi 5 QF6Xps 100 2.1050 1.2504QK2X QK2Xmag IDX skew QK2Xps 5 2.5363e-2 0.0QD7X QF4Xmag Hitachi 5 QF4Xps 100 2.1050 -1.2504QF7X QD8Xmag Hitachi 4 QD8Xps 200 2.0650 1.6706 6QD8X QF7Xmag Hitachi 4 QD4Xps 200 2.0650 -1.2478 5QF8X QD9Xmag Hitachi 4 ------ 200 2.0650 1.6706 6QK3X QK3Xmag IDX skew QK3Xps 5 2.5363e-2 0.0QD9X ------- IHEP ------ 100 2.5 -1.2504 1QF9X ------- IHEP ------ 100 2.5 1.2504 1QK4X QK4Xmag IDX skew QK4Xps 5 2.5363e-2 0.0QD10X ------- IHEP ------ 100 2.5 -0.8436 1QF10X ------- IHEP ------ 100 2.5 0.8106 1QD11X ------- IHEP ------ 100 2.5 -0.3753 1QF11X ------- IHEP ------ 100 2.5 0.3753 1QD12X ------- IHEP ------ 100 2.5 -0.3753 1note: IHEP quadrupole may need > 100 amps to reach KL = 2.5

    M. Woodley [SLAC]

  • NOTEs:

    a) the names in the "quad name" column of TABLE 2 should be considered arbitrary; in some cases existing EXT quads were not moved or reconnected but were renamed

    b) quad center locations upstream of BH4X are unchanged (except for new quad QMX); the quad support stands are also unchanged since only quads with identical core lengths (but different number of coil turns) have been "swapped"; all quads downstream of BH4X have been moved

    c) the Hitachi Type 2 and Tokin 3393 quads are 6 cm core magnets ... all other quads (except for skews) are 18 cm core magnets; the Hitachi quads have a KLmax of 0.6657 at 100 amps, while the Tokin quad has less than half the strength (0.3021) at 100 amps

    d) all but two of the quad power supplies (neglecting skews) are 100 amps; there are two 200 amp power supplies

    1) new magnet (IHEP) ... I am assuming KLmax = 2.5 @ 100 amps

    2) the quad named QD5X in the ATF2 "optimal 2" optics is a 6 cm magnet that requires KL = -0.3528 ... since this exceeds KLmax for a Tokin 3393 (assuming a 100 amp power supply), the Hitachi Type 2 quad QD1Xmag was moved to this location, with QD6Xmag moved to become QD1X; since the QD6Xps and QD1Xps power supplies are identical, they weren't swapped; if we assume that we can get a 140 amp power supply for QD5X, then no swap is needed and we can use QD6Xmag at this location

    3) a Hitachi Type 5 magnet is used at the (new) QMX location because it's required strength is greater than KLmax for the other available types; QF5Xmag magnet and QF5Xps power supply cables are moved to this location

    4) a new (IHEP) quad is used at the QF4X location because the required strength would be 98% of a Hitachi Type 5 magnet with a 100 amp power supply ... it's < 83% of an IHEP quad

    5) the QF7Xps power supply is used for QD4X because only 100 amps are needed; the 200 amp power supply (QD4Xps) is needed for QD8X because it's required strength is greater than KLmax for a Hitachi Type 4 magnet with a 100 amp power supply

    6) QF7X and QF8X are powered in series with power supply QD8Xps

    M. Woodley [SLAC]

  • Existing EXT Quadrupole Power SuppliesExisting EXT MagnetsEXT Modifications for ATF2 (Optimal 2)

    M. Woodley [SLAC]

  • Chicane Removal OptionsOptimal 2.1: remove chicanerematch to FF using matching quadslaserwire detectors between FF B5 and QD6IP moves 5.1 m east and 0.8 m north

    Optimal 2.2: remove chicane; lengthen skew/emit sectionminimize changes to existing EXT magnets and power supplies (like Optimal)optimize vertical spot sizes at wire scanners (big enough for 10 m tungsten or carbon filament wires, small enough to generate reasonable gamma flux from laserwire ~5 m?)laserwire detectors between FF B5 and QD6IP stays at Optimal 2 location

    Optimal 2.3: remove chicane; reduce EXT BH2X.1 bend (~50%)rematch to skew/emit using EXT quadsrematch to FF using matching quadslaserwire detectors between FF B5 and QD6IP moves 4.7 m east and 10.2 m north

    Optimal 2.4: remove chicane; reduce BH2X.1; lengthen skew/emit sectionminimize changes to existing EXT magnets and power supplies (like Optimal)optimize vertical spot sizes at wire scanners (big enough for 10 m tungsten or carbon filament wires, small enough to generate reasonable gamma flux from laserwire ~5 m?)laserwire detectors between FF B5 and QD6IP moves 0.5 m west and 10.2 m north

    M. Woodley [SLAC]

  • 13.4 m wall to dump face(19.3 m wall to IP)Assembly HallOptimal 2.1: remove chicanerematch to FF using matching quadslaserwire detectors between FF B5 and QD6IP moves 5.1 m east and 0.8 m north

    M. Woodley [SLAC]

  • *x,y = 4,0.1 mm

    M. Woodley [SLAC]

  • 8.3 m wall to dump face(14.3 m wall to IP)Assembly HallOptimal 2.2: remove chicane; lengthen skew/emit sectionminimize changes to existing EXT magnets and power supplies (like Optimal)optimize vertical spot sizes at wire scanners (big enough for 10 m tungsten or carbon filament wires, small enough to generate reasonable gamma flux from laserwire ~5 m?)laserwire detectors between FF B5 and QD6IP stays at Optimal 2 location

    M. Woodley [SLAC]

  • *x,y = 4,0.1 mm

    M. Woodley [SLAC]

  • 9090180909090 x y3357573333575733SQSQSQSQWSWSWSWSWS59.28.3108.04.559.28.3108.04.559.28.3 (m)2.02.02.02.02.02.02.02.02.01.31.31.31.3EXT Diagnostic Section (optimal 2.2)7 < x/y < 24

    M. Woodley [SLAC]

  • 12.8 m wall to dump face(18.8 m wall to IP)Assembly HallOptimal 2.3: remove chicane; reduce EXT BH2X.1 bend (~50%)rematch to skew/emit using EXT quadsrematch to FF using matching quadslaserwire detectors between FF B5 and QD6IP moves 4.7 m east and 10.2 m north

    M. Woodley [SLAC]

  • *x,y = 4,0.1 mm

    M. Woodley [SLAC]

  • new quadrupole QMX (between QF3X and BH1X.3)

    M. Woodley [SLAC]

  • 7.6 m wall to dump face(13.6 m wall to IP)Assembly HallOptimal 2.4: remove chicane; reduce BH2X.1; lengthen skew/emit sectionminimize changes to existing EXT magnets and power suppliesoptimize vertical spot sizes at wire scanners (big enough for 10 m tungsten or carbon filament wires, small enough to generate reasonable gamma flux from laserwire ~5 m?)laserwire detectors between FF B5 and QD6IP moves 0.5 m west and 10.2 m northEXT optics for this option is still under construction more later!

    M. Woodley [SLAC]

  • verify that laserwire detector location downstream of FF B5 is OK decide on removal of chicane (see Junjis talk on Sunday morning)

    select one of the options for further study reoptimize skew correction and diagnostics section for best measurement performance with least change to EXT magnets upstream of BH2X.1 (try to avoid swapping)

    should we assume commissioning with conventional wire scanners (recycle the MWs)? can we can put < 10 m diameter carbon wires in wire scanners for more accurate beam size measurements?

    what is the optimum beam size for measurement with either laserwire or conventional wire scanner? 5 m?

    if we choose to reduce bend angle of BH2X.1, need to make realistic optics perhaps revisit reduced dispersion EXT optics

    possible modifications to matching section between EXT and FF to accommodate tail-folding octupoles (see Sergeis talk on Sunday afternoon)

    TURTLE tracking need to reoptimize system bandwidth and performance

    revisit simulations of steering and dispersion/coupling correction with machine and diagnostics errorsContinuing Optics Work

    M. Woodley [SLAC]