! *** OPTICS=AD_ACCEL-05DEC19 *** ! LCLS2sc bunch compressor chicane #2 ! ============================================================================== ! Modification History ! ------------------------------------------------------------------------------ ! 23-MAY-2019, M. Woodley ! * move ENDBC2B to u/s face of QE201 per T. Maxwell ! 12-APR-2019, M. Woodley ! * rename some MARKERs (to avoid conflicts with LCLS) ! ------------------------------------------------------------------------------ ! 05-SEP-2017, M. Woodley ! * rename: BPM21->BPM21B, CEBC2->CE21B, WS21->WS21B ! * move BZ21B 0.076976 m upstream per F. Carillo ! * move QE201/BPME201 0.050338 m downstream per F. Carillo ! 16-AUG-2017, M. Woodley ! * set FINT for BC2 bends to 0.6287 per Magnetic Measurements data ! ------------------------------------------------------------------------------ ! 28-FEB-2017, M. Woodley ! * relocate YC2C00, YCE201, XCE202, YCE203, and XCE204 per F. Carillo ! ------------------------------------------------------------------------------ ! 28-NOV-2016, M. Woodley ! * merge LCLS-II' version 28NOV16 with LCLS2sc version 04NOV16 ! ------------------------------------------------------------------------------ ! 26-AUG-2016, M. Woodley ! * add two 1.259Q3.5 quadrupoles to EMIT2 ! * create double-waist in EMIT2 for emittance measurement ! 01-JUL-2016, M. Woodley ! * LCLS-II-HE ! * remove COL2 and replace with direct match into L3 ! ------------------------------------------------------------------------------ ! 03-JUN-2016, M. Woodley ! * change deferment level to 0 for XCC204, YCC207, and XCC208 ! * move XCC210 to d/s side of QC210 ... shorten L3 u/s PSC drift ! ------------------------------------------------------------------------------ ! 23-FEB-2016, M. Woodley ! * push extra drift from L2 d/s PSC into D2C00 (DPSC2d[L]+D2C00[L]=constant) ! * per F. Carillo: move XC2C00 u/s 11 cm, BZ21B d/s 18 cm, XCC210 u/s 14 cm ! ------------------------------------------------------------------------------ ! 01-OCT-2015, M. Woodley ! * fix negative D2C00a drift length error by shortening DPSC2D drift; set ! D2C00a length to zero ! * undefer CEBC2 ! * change TYPE of OTRs and YAGs per Henrik's PRD ! ------------------------------------------------------------------------------ ! 19-JUN-2015, M. Woodley ! * device locations per F. Carrillo ! * undefer BPM21 and OTR21B ! * defer collimators CYC21, CXC21, CYC23, and CXC23 ! * undefer WSC202, WSC204, WSC206, and WSC208 ! * collimator gaps per P. Emma ! ------------------------------------------------------------------------------ ! 20-MAR-2015, M. Woodley ! * device locations per F. Carillo ! * set WS21 deferment to level 3; set OTR21B deferment to level 0 ! * set collimator lengths (tungsten) and gaps per LCLSII-2.4-PR-0095-R0 ! ------------------------------------------------------------------------------ ! 12-DEC-2014, M. Woodley ! * change RFB21 (defer=2) to BPM21 (defer=0) ! ------------------------------------------------------------------------------ ! 28-OCT-2014, M. Woodley ! * move COL2 collimators 7 inches closer to their associated quadrupoles ! ------------------------------------------------------------------------------ ! 15-OCT-2014, M. Woodley ! * increase central drift of BC1 chicane from 1.0926 m to 1.75 m; add OTR21B ! * remove 0.6574 m (1.75 m - 1.0926 m) from COL2 to keep L1-L2 separation ! constant ! * add 6 stripline BPMs to COL2 ... omitted when we switched to 45 degree ! FODO cells ! * adjust deferment/deprecation levels ! ------------------------------------------------------------------------------ ! 07-AUG-2014, M. Woodley ! * diagnostics complement per "Electron Beam Diagnostics Systems" PRD ! (LCLSII-2.7-PR-0170) ! * change bending direction in BC2 chicane ... toward the aisle ! * OTR in BC2 chicane replaced with wire scanner; BPM replaced with RF BPM ! * COL2 collimation system now consists of four 45 degree FODO cells with 3 ! pairs of collimators separated by 45 degrees (22 m betas at collimators); ! FODO cell length is 12 m ! * TCAV(Y) added d/s of BC2 ! * in-line emittance measurement system incorporated into COL2 ! * decorate device TYPE attributes to indicate non-baseline status ! 17-APR-2014, M. Woodley ! * add "CNT" MARKERs after dispersive areas (ELEGANT CENTERing) ! ------------------------------------------------------------------------------ ! 28-MAR-2014, M. Woodley ! * remove elements associated with now-defunct DIAG2 diagnostic line ! * element names changed to conform to nomenclature PRD ! ------------------------------------------------------------------------------ ! 14-JAN-2014, M. Woodley ! * change BC2 dipole names from "BX2*" to "BXC2*" ! ------------------------------------------------------------------------------ ! ============================================================================== ! SBEN ! ------------------------------------------------------------------------------ ! BC2 chicane ! - approximate on-axis effective length per R. Carr (01-AUG-05 PE) ! - use series approximation for sinc(x)=sin(x)/x to allow BXh=0 ! GB2 : 1D19.7 gap height (m) ! ZB2 : 1D19.7 "Z" length (m) ! FB2 : measured fringe field ! AB2 : chicane bend angle (rad) ! BB2 : chicane bend field (kG) ! LB2 : chicane bend path length (m) ! AB2S : "short" half chicane bend angle (rad) ! LB2S : "short" half chicane bend path length (m) ! AB2L : "long" half chicane bend angle (rad) ! LB2L : "long" half chicane bend path length (m) GB2 := 0.03335 ZB2 := 0.549 FB2 := 0.6287 AB2 := 0.043924602172 !R56=0.03955 BB2 := Brho2*SIN(AB2)/ZB2 AB2_2 := AB2*AB2 AB2_4 := AB2_2*AB2_2 AB2_6 := AB2_4*AB2_2 SINCAB2 := 1-AB2_2/6+AB2_4/120-AB2_6/5040 !~sinc(AB2)=sin(AB2)/AB2 LB2 := ZB2/SINCAB2 AB2S := ASIN(SIN(AB2)/2) AB2S_2 := AB2S*AB2S AB2S_4 := AB2S_2*AB2S_2 AB2S_6 := AB2S_4*AB2S_2 SINCAB2S := 1-AB2S_2/6+AB2S_4/120-AB2S_6/5040 !~sinc(AB2S)=sin(AB2S)/AB2S LB2S := ZB2/(2*SINCAB2S) AB2L := AB2-AB2S LB2L := LB2-LB2S BCX21a : SBEN, TYPE="1D19.7", L=LB2S, ANGLE=+AB2S, HGAP=GB2/2, & E1=0, FINT=FB2, FINTX=0 BCX21b : SBEN, TYPE="1D19.7", L=LB2L, ANGLE=+AB2L, HGAP=GB2/2, & FINT=0, E2=+AB2, FINTX=FB2 BCX22a : SBEN, TYPE="1D19.7", L=LB2L, ANGLE=-AB2L, HGAP=GB2/2, & E1=-AB2, FINT=FB2, FINTX=0 BCX22b : SBEN, TYPE="1D19.7", L=LB2S, ANGLE=-AB2S, HGAP=GB2/2, & FINT=0, E2=0, FINTX=FB2 BCX23a : SBEN, TYPE="1D19.7", L=LB2S, ANGLE=-AB2S, HGAP=GB2/2, & E1=0, FINT=FB2, FINTX=0 BCX23b : SBEN, TYPE="1D19.7", L=LB2L, ANGLE=-AB2L, HGAP=GB2/2, & FINT=0, E2=-AB2, FINTX=FB2 BCX24a : SBEN, TYPE="1D19.7", L=LB2L, ANGLE=+AB2L, HGAP=GB2/2, & E1=+AB2, FINT=FB2, FINTX=0 BCX24b : SBEN, TYPE="1D19.7", L=LB2S, ANGLE=+AB2S, HGAP=GB2/2, & FINT=0, E2=0, FINTX=FB2 ! define unsplit SBENs for BMAD ... not used by MAD BCX21 : SBEN, TYPE="1D19.7", HGAP=GB2/2, L=LB2, ANGLE=+AB2, & E1=0, FINT=FB2, E2=+AB2, FINTX=FB2 BCX22 : SBEN, TYPE="1D19.7", HGAP=GB2/2, L=LB2, ANGLE=-AB2, & E1=-AB2, FINT=FB2, E2=0, FINTX=FB2 BCX23 : SBEN, TYPE="1D19.7", HGAP=GB2/2, L=LB2, ANGLE=-AB2, & E1=0, FINT=FB2, E2=-AB2, FINTX=FB2 BCX24 : SBEN, TYPE="1D19.7", HGAP=GB2/2, L=LB2, ANGLE=+AB2, & E1=+AB2, FINT=FB2, E2=0, FINTX=FB2 ! ============================================================================== ! QUAD ! ------------------------------------------------------------------------------ ! L2 to BC2 chicane KQ2C01 := 0.509106837541 Q2C01 : QUAD, TYPE="1.26Q3.5", L=LQx/2, APER=rQx, K1=KQ2C01 ! BC2 chicane KCQ21 := 0 KCQ22 := 0 CQ21B : QUAD, TYPE="1.69Q3.4", L=LQc/2, APER=rQc, K1=KCQ21 CQ22B : QUAD, TYPE="1.69Q3.4", L=LQc/2, APER=rQc, K1=KCQ22 ! match into L3 KQE201 := -1.311184352516 KQE202 := 1.991949996425 KQE203 := -1.816251165832 KQE204 := 1.650789479332 QE201 : QUAD, TYPE="1.26Q3.5", L=LQx/2, APER=rQx, K1= KQE201 QE202 : QUAD, TYPE="1.26Q3.5", L=LQx/2, APER=rQx, K1= KQE202 QE203 : QUAD, TYPE="1.26Q3.5", L=LQx/2, APER=rQx, K1= KQE203 QE204 : QUAD, TYPE="1.26Q3.5", L=LQx/2, APER=rQx, K1= KQE204 ! ============================================================================== ! DRIF ! ------------------------------------------------------------------------------ ! L2 to BC2 chicane D2C00 : DRIF, L=1.150310011609 D2C01 : DRIF, L=0.5 D2C00b : DRIF, L=0.338951 D2C00c : DRIF, L=0.321049 D2C00a : DRIF, L=D2C00[L]-D2C00b[L]-D2C00c[L] D2C01a : DRIF, L=0.133 D2C01b : DRIF, L=D2C01[L]-D2C01a[L] ! BC2 chicane ZDC2o := 10.4092-ZB2 !BXC21 exit to BCX22 entrance ZDC2i := 2.299-ZB2 !BXC22 exit to BCX23 entrance DC2o : DRIF, L=ZDC2o/COS(AB2), TYPE="CSR" DC2i : DRIF, L=ZDC2i, TYPE="CSR" ZDC2oa := 2.009462 !BXC21 exit to CQ21B center ZDC2ob := ZDC2o-ZDC2oa !CQ21B center to BCX22 entrance ZDC2od := 2.009462 !CQ22B center to BXC24 entrance ZDC2oc := ZDC2o-ZDC2od !BXC23 exit to CQ22B center DC2oa : DRIF, L=ZDC2oa/COS(AB2)-LQc/2, TYPE="CSR" DC2ob : DRIF, L=ZDC2ob/COS(AB2)-LQc/2, TYPE="CSR" DC2ih : DRIF, L=DC2i[L]/2, TYPE="CSR" DC2ia : DRIF, L=0.3795, TYPE="CSR" !0.35 DC2ib : DRIF, L=0.165-Ljaw/2, TYPE="CSR" !0.35 DC2ic : DRIF, L=0.183-Ljaw/2, TYPE="CSR" !0.35 DC2id : DRIF, L=0.598, TYPE="CSR" !0.35 DC2ie : DRIF, L=0.4245, TYPE="CSR" !0.35 DC2oc : DRIF, L=ZDC2oc/COS(AB2)-LQc/2, TYPE="CSR" DC2od : DRIF, L=ZDC2od/COS(AB2)-LQc/2, TYPE="CSR" ! match into L3 LEMIT2 := 28.859648 DE200 : DRIF, L= 1.050338 DE201 : DRIF, L= 4.906343360384 DE202a : DRIF, L=10.974020455558 DE203 : DRIF, L= 3.0 DE204 : DRIF, L= 0.670516558157 DE202b : DRIF, L=LEMIT2-4*LQx-DE200[L]-DE201[L]-DE202a[L]-DE203[L]-DE204[L] DE202 : DRIF, L=DE202a[L]+DE202b[L] DE200a : DRIF, L=0.687372 DE200b : DRIF, L=DE200[L]-DE200a[L] DE201a : DRIF, L=0.321044 DE201b : DRIF, L=0.328618 DE201c : DRIF, L=DE201[L]-DE201a[L]-DE201b[L] DE202a1 : DRIF, L=0.321864 DE202a2 : DRIF, L=DE202a[L]-DE202a1[L] DE203a : DRIF, L=0.321044 DE203b : DRIF, L=DE203[L]-DE203a[L] DE204a : DRIF, L=0.321864 DE204b : DRIF, L=DE204[L]-DE204a[L] ! ============================================================================== ! BPMs ! ------------------------------------------------------------------------------ BPM2C01 : MONI, TYPE="Stripline-1" BPME201 : MONI, TYPE="Stripline-1" BPME202 : MONI, TYPE="Stripline-1" BPME203 : MONI, TYPE="Stripline-1" BPME204 : MONI, TYPE="Stripline-1" RFB2C01 : MONI, TYPE="@2,CavityS-1" BPM21B : MONI, TYPE="Stripline-8" !RFB21 : MONI, TYPE="@2,CavityL-1" ! ============================================================================== ! XCORs ! ------------------------------------------------------------------------------ XC2C00 : HKIC, TYPE="class-4" XCE202 : HKIC, TYPE="class-4" XCE204 : HKIC, TYPE="class-4" ! ============================================================================== ! YCORs ! ------------------------------------------------------------------------------ YC2C00 : VKIC, TYPE="class-4" YCE201 : VKIC, TYPE="class-4" YCE203 : VKIC, TYPE="class-4" ! ============================================================================== ! marker points, etc. ! ------------------------------------------------------------------------------ ! collimator CE21B : RCOL, L=Ljaw, XSIZE=13.3e-3, TYPE="HCOLL" !X momentum collimator ! instruments OTR21B : PROF, TYPE="OTR BC" !BC2 energy spread WS21B : WIRE, TYPE="@3,fast" !BC2 energy spread BZ21B : BLMO, TYPE="CSR" !CSR-based relative bunch length monitor IM21B : IMON, TYPE="ICT" !Beam Current Monitor WSEMIT2 : WIRE, TYPE="fast" !post-BC2 emittance ! markers BC2BcBEG : MARK BC2BcMID : MARK CNTBC2 : MARK, TYPE="CENTER" BC2BcEND : MARK ! ============================================================================== ! BEAMLINE ! ------------------------------------------------------------------------------ BCX21_full : LINE=(BCX21a,BCX21b) BCX22_full : LINE=(BCX22a,BCX22b) BCX23_full : LINE=(BCX23a,BCX23b) BCX24_full : LINE=(BCX24a,BCX24b) Q2C01_full : LINE=(Q2C01,BPM2C01,Q2C01) CQ21B_full : LINE=(CQ21B,CQ21B) CQ22B_full : LINE=(CQ22B,CQ22B) QE201_full : LINE=(QE201,BPME201,QE201) QE202_full : LINE=(QE202,BPME202,QE202) QE203_full : LINE=(QE203,BPME203,QE203) QE204_full : LINE=(QE204,BPME204,QE204) BC2i0 : LINE=(D2C00,& Q2C01,Q2C01,D2C01) BC2i : LINE=(D2C00a,XC2C00,D2C00b,YC2C00,D2C00c,& Q2C01_full,D2C01a,RFB2C01,D2C01b) BC2c0 : LINE=(BC2BcBEG,& BCX21a,BCX21b,DC2o,& BCX22a,BCX22b,DC2ih,BC2BcMID,DC2ih,& BCX23a,BCX23b,DC2o,& BCX24a,BCX24b,& BC2BcEND) BC2c : LINE=(BC2BcBEG,& BCX21_full,DC2oa,& CQ21B_full,DC2ob,& BCX22_full,DC2ia,BPM21B,DC2ib,CE21B,DC2ic,OTR21B,DC2id,WS21B,DC2ie,& BCX23_full,DC2oc,& CQ22B_full,DC2od,& BCX24_full,CNTBC2,& BC2BcEND) BC2 : LINE=(BEGBC2B,BC2i,BC2c) EMIT2 : LINE=(DE200a,BZ21B,DE200b,ENDBC2B,BEGEMIT2,& QE201_full,DE201a,YCE201,DE201b,IM21B,DE201c,& QE202_full,DE202a1,XCE202,DE202a2,WSEMIT2,DE202b,& QE203_full,DE203a,YCE203,DE203b,& QE204_full,DE204a,XCE204,DE204b,& ENDEMIT2) ! ------------------------------------------------------------------------------ RETURN