Current status of run14 VTX alignment Taebong Moon Yonsei Univ./RIKEN June 16th 2014

Purpose of VTX alignment Darren’s plots One of most important variable is DCA for charm/bottom separation and other heavy flavor measurements. Two top figures show strange behavior of DCA distribution. The reason is that …

The 1st reason VTX W/E and DCH W/E have their own coordinate systems. They are different from each other. Related to coordinate offset calibration O(VTXEAST) O(VTXWEST) O(DCHWEST)

The 2nd reason Ideal location of ladders is different from real location of ladders. Related to VTX ladder by ladder alignment. Sasha’s plots

When should we do VTX DCH As shown top table, Have to do VTX to CNT (coordinate) offset calibration 8 times between Mar 14th and Mar 19th, Mar 19th and Apr 2nd, something like this. Have to do VTX East to West (coordinate) offset calibration and ladder by ladder alignment one time. HISTORY: https://www.phenix.bnl.gov/WWW/run/14/history.html CARRIAGE MOIVING: https://www.phenix.bnl.gov/WWW/run/14/carriageMoves.html SHIFT MEETING: http://www.phenix.bnl.gov/WWW/run/14/sc_tracker/input.html

Coordinate offset calibration Have finished the calibration. Will explain how to do the calibration step by step. Before matching coordinate, calculate “VTX to CNT” and “VTX EAST to WEST” offsets using zero-field data. O(VTXEAST) O(VTXWEST) EastToWest offset O(DCHWEST) VTXToCNT offset

The 1st step: Beam center Calculate beam center in their own coordinate systems using zero-field data. BC by VTXE in VTXE internal coordinate Beam Center (reference point) O(VTXEAST) BC by VTXW in VTXW internal coordinate O(VTXWEST) BC by DCHW in DCHW internal coordinate O(DCHWEST)

Step 1-1. Beam center in VTX W/E coordinate

DCA0 formula for fitting DCA0 can be represented by beamcenter. For fitting, DCA0 = Xbeam sin φb - Ybeam cos φ b 𝝋𝒃=𝒕𝒂𝒏 −𝟏 ( 𝒚𝟏−𝒚𝟎 𝒙𝟏−𝒙𝟎 ) Before fitting, DCA0 as a function of 𝜑𝑏 should be known. (x1, y1) Y Beam center (xbeam, ybeam) (x0, y0) DCA0 from O (VTXW/E) 𝝋𝒃 X O (VTXW/E) This is calculated in VTX internal coordinate

DCA0 formula for data point By using position of hits in B0 , we can know DCA0 for data point. |𝑫𝑪𝑨𝟎|= 𝒅 𝒙 •𝒅 𝒙 −| 𝒖 •𝒅 𝒙 || 𝒖 •𝒅 𝒙 | 𝒅 𝒙 =(𝒙𝟎,𝒚𝟎 𝒖 =(𝐜𝐨𝐬 𝝋 𝒃 ,𝐬𝐢𝐧 𝝋 𝒃 𝝋𝒃=𝒕𝒂𝒏 −𝟏 ( 𝒚𝟏−𝒚𝟎 𝒙𝟏−𝒙𝟎 ) (x1, y1) O (VTXW/E) (x0, y0) Beam center (xbeam, ybeam) Y 𝒖 •𝒅 𝒙 𝒅 𝒙 𝒖 =(𝐜𝐨𝐬 𝝋 𝒃 ,𝐬𝐢𝐧 𝝋 𝒃 DCA0 from O (VTXW/E) 𝝋𝒃 X This is calculated in VTX internal coordinate

Beam center by VTX : fit DCA0 vs Фb Plot 2-D distribution of DCA0 vs 𝜑 𝑏 . Do Fitting using below function. - DCA0 = par[0]sin Фb + par[1]cos Фb - par[0] = XBC = 0 - par[1] = YBC = 0 After fitting, it return beamcenter in the VTX West coordinate. - par[0] = 0.285206+E-4 - par[1] = 0.0465125+E-5 Parameters should not be fixed Those will be used as initial parameters for next fitting. ZEROFDATA_P00_0000405836_000(0~19).PRDFF Run Number : 406541 Energy : 200 GeV Number of events : 1.315M

Beam center by VTX : background reduction Before 2nd iteration, let’s eliminate background. Calculate DCA0 - par[0]sin Фb - par[1]cos Фb. par[0] = 0.285206 par[1] = -0.0465125 Fitting function. 𝑦= 𝐴 2𝜋𝜎 exp(− 1 2 𝑥−𝜇 𝜎 2 )+𝐶 Get σ from fitting. Apply 5-sigma cut - lDCA0 - par[0]sin Фb - par[1]cos Фbl < 5σ DCA0 - par[0]sin Фb - par[1]cos Фb

Beam center by VTX : refit DCA0 vs Фb Plot 2-D distribution of DCA0 vs 𝜑 𝑏 again. Fit function again. - DCA0 = par[0]sin Фb +par[1]cos Фb - par[0] = 0.293506+-E-5 - par[1] = -0.0471569+E-5 Final result. - par[0] = Xoffset = 0.293613+E-5 cm - par[1] = -Yoffset = 0.0472786+-E-5 cm

Step 1-2. Beam center in DCH W/E coordinate

Beam center by DCH Due to DCH offset, α is not 0 and represented by following formula. α O (DCHWEST) = (Xoffset, Yoffset) O (0, 0) DCH offset 𝛼=− 𝑋 𝑜𝑓𝑓𝑠𝑒𝑡 𝑅 𝐷𝐶 𝑠𝑖𝑛𝜙+ 𝑌 𝑜𝑓𝑓𝑠𝑒𝑡 𝑅 𝐷𝐶 𝑐𝑜𝑠𝜙 DCH West Arm Ф

Beam center by DCH : how to? Extract α and Ф from data. Plot α and Ф. Fit function: α = par[0]*sin Ф + par[1]*cos Ф par[0] = -Xoffset/R & par[1] = Yoffset/R Apply cuts to reduce noise. Quality = 31 or 63 -75 < zed < 75cm -.012<emcdphi<.008 -6<emcdz<10 ecore>0 .1<pc3dphi<.1 -.01<alpha<.01 -1.5<phi<1.5 Re-fit again.

Beam center by DCH_W : how to? Runnumber = 406541 As α is closed to 0 and flat as a function of φ, fitting is better. 𝑿 𝑫𝑪_𝒐𝒇𝒇𝒔𝒆𝒕 =−𝟎.𝟏𝟏𝟓𝟔𝟏𝟗𝒄𝒎 𝒀 𝑫𝑪_𝒐𝒇𝒇𝒔𝒆𝒕 =𝟎.𝟎𝟔𝟒𝟏𝟏𝟗𝟓𝒄𝒎

Step 2: Coordinate offsets VTX West beam center = (0.293613 cm, 0.0472786 cm) VTX East beam center = (0.290074 cm, 0.0632157 cm) DCH West beam center = (-0.115619 cm, 0.0641195 cm) EastToWestOffset = (WEST) – (EAST) = (0.003539 cm, -0.01594 cm) VTXToCNT Offset = (CNT) – (VTX) = (-0.40923 cm, 0.016841 cm) BC by VTXE in VTXE internal coordinate Relative positions can be calculated if we know BCs in their own internal coordinates. Beam Center (reference point) O(VTXEAST) BC by VTXW in VTXW internal coordinate O(VTXWEST) EastToWest offset BC by DCHW in DCHW internal coordinate O(DCHWEST) VTXToCNT offset

Step 3: Beam center & fine tune offset First, In production (Fun4All_VTX) macro, let’s use beam center and offset parameters by 0-field data corresponding to physics data we are using. SvxParManager *svxpar = new SvxParManager(); svxpar->set_ReadGeoParFromFile(1); svxpar->set_GeometryFileName("svxPISA.par"); svxpar->set_OffsetVtxToCnt(-0.409232,0.0168409,0.0); Svxpar->set_OffsetEastToWest(0.003539,-0.0159371,0.0); svxpar->set_BeamCenter(-0.115619,0.197408); Parameters from 0-field run : 406541

Step 3: Beam center & fine tune offset First, In production (Fun4All_VTX) macro, let’s use beam center and offset parameters by 0-field data corresponding to physics data we are using. Let’s shift mean of gaussian function to 0 by doing iteration. SvxParManager *svxpar = new SvxParManager(); svxpar->set_ReadGeoParFromFile(1); svxpar->set_GeometryFileName("svxPISA.par"); svxpar->set_OffsetVtxToCnt(-0.409232+ par 1st,0.0168409 + par 1st ,0.0 + par 1st ); Svxpar->set_OffsetEastToWest(0.003539 + par 1st ,-0.0159371 + par1st ,0.0 + par 1st); svxpar->set_BeamCenter(-0.115619 + par 1st,0.197408 + par 1st); New parameter = old parameter from 0-field run + mean value from gaussian fitting (1st iteration)

Resolution of DCA

Summary. Have finished coordinate offset calibration. Doing VTX ladder by ladder alignment with Hidemitsu.

Backup slides

Step 3 : Offset fine tune using physics data Data set: Physic (field-on) data Macro: Fun4All_VTX.C for production read_evttree_mkpara_richcut_new0.C read_evttree_mkpara_ver2.h draw_mkpara_richcut.C Source: SvxAlignment.cc/h Beam center & EastToWest offset calibration Alignment ladder by ladder in φ , z and r Didn’t get final results for beam center & fine tune offsets calib yet. -> show you test results.

Introduction to calibration Alignment 1st STEP Alignment 2nd STEP BeamCenter STEP

The 1st step: Beam center Calculate beam center in their own coordinate systems. BC by VTXE in VTXE internal coordinate = (-2mm, 1mm) Relative positions can be calculated if we know BCs in their own internal coordinates. Beam Center (reference point) O(VTXEAST) BC by VTXW in VTXW internal coordinate = (1mm, 2mm) O(VTXWEST) EastToWest offset = (1+2mm, 2-1mm) BC by DCHW in DCHW internal coordinate = (-2mm, 4mm) O(DCHWEST) VTXToCNT offset = (-2-1mm, 4-2mm)

Brief story for 1st step: Coordinate Offset Calib Data set: 0-field run Macro: OnCal_Svxoffset_zerof_CNT.C Source: SvxOffsetCal.C/h & manual_DCHcalib.C Check run & detector status Hot and dead map Beam center by VTX VTX EastToWest offset Beam center by DCH VTXToCNT offset Status: 1st step, coordinate calibration w/o hot and dead map for 9 zero-field runs on run-by-run basis, done. It should be re-done w/ hot & dead map. If ladder by ladder calib continually failed, long iteration need to be done again. But it is unusual. For VTX offset For DCH offset Those parameters used for VTX ladder by ladder alignment Ladder by Ladder Calib

2) Alignment Ladder by Ladder in φ and z

Brief story for 1st step: Coordinate Offset Calib Data set: 0-field run Location: /direct/phenix+hhj/tmoon/vtx/calibration/offset/offsetRun14HEAuAu200v1/macros-scripts/ /direct/phenix+hhj/tmoon/vtx/calibration/offset/offsetRun14HEAuAu200v1/macros-scripts/online/calibration/onlcal/subsystems/svx /direct/phenix+hhj/tmoon/vtx/calibration/offset/offsetRun14HEAuAu200v1/macros-scripts/online/calibration/onlcal/subsystems/svx/macros Macro: OnCal_Svxoffset_zerof_CNT.C Source: SvxOffsetCal.C/h & manual_DCHcalib.C

Brief story for 2nd step: VTX L by L alignment. Data set: field-on run Location: offline/analysis/svxalignment/ offline/analysis/svxalignment/work/dphiplot/read_evttree_mkpara_richcut_new0.C&read_evttree_mkpara_ver2.h offline/analysis/svxalignment/work/dphiplot/draw_mkpara_richcut.C offline/analysis/svxalignment/work/adjustGeom.C&adjustGeom.h /direct/phenix+hhj2/tmoon/align/offline/analysis/svxalignment Macro: Fun4All_VTX.C Source: SvxAlignment.cc/h

Feb. 14: East carriage moved into run position, ready for physics. Feb. 18: Zero-field runs 402340 and 402338 with a total of ~780k events. Feb. 19: Access, East carriage moved out and in. Feb. 20: Zero-field run 402765 with a total of ~590k events. Feb. 24: Access and move of East carriage out and in. Feb. 24: Zero-field run 403312, 403318, 403319, 403322, 403324, 403329 with a total of ~3M events. Note: extended runs because of possible timing shift. Mar. 05: Access (maintenance day) and move of East and West Carriage. Mar. 08: Zero-field runs 404895, 404891, 404892, 404893, 404894 with a total of ~1.4M events. Mar. 11: End of LE run, maintenance day, East carriage moved. ----- Mar. 15: 200 GeV Au+Au, Zero-field runs 405836, 405837, 405838 with a total of ~13M events. Mar. 19: West carriage moved, Zero-field run 406541 with ~1.5M events Apr. 02: East/West carriage moved, Zero-field run 408185 with a total of ~ 2M events. Apr. 04: East carriage moved, Zero-field run 408327 with about 2M events. Apr. 16: West carriage moved, Zero-field run 409446 with about 9M events. Apr. 25: West carriage moved, Zero-field run 410113 with about 11M events. Apr. 30: West carriage moved, Zero-field runs 410660, 410661 with about 2.5M events. May 05: West carriage moved, Zero-field run 410925 with about 8.8M events. May 12: East carriage moved, Zero-field runs 411562, 411653, 411654, and 411655 with about 7.5M events. May 14: East carriage moved, Zero-field run 411768 with about 3.8M events. May 28: East and West carriage moved, Zero-field run to be performed.

VTX W/E Beamcenter

DCH W/E Beamcenter

CNT East To West

VTX To CNT Offset

VTX East To West

0-field Run 14 AuAu 200 GeV 405836

0-field Run 14 AuAu 200 GeV 406541

0-field Run 14 AuAu 200 GeV 408185

0-field Run 14 AuAu 200 GeV 408327

0-field Run 14 AuAu 200 GeV 409446

0-field Run 14 AuAu 200 GeV 410113

0-field Run 14 AuAu 200 GeV 410660

0-field Run 14 AuAu 200 GeV 410925

0-field Run 14 AuAu 200 GeV 411768

2) Hot and dead map If there is hot and dead map in the DB, it will be downloaded automatically. can check whether if hot and dead map was properly applied to calculation or not by looking at error massages.

Purpose Before trying alignment, need offsets as parameters of each period for correction. OffsetVtxToCnt = DCH_West_beamcenter – VTX_West_beamcenter OffsetEastToWest = VTX_West_beamcenter – VTX_East_beamcenter BeamCenter = DCH_West_beamcenter EXAMPLE SvxParManager *svxpar = new SvxParManager(); svxpar->set_ReadGeoParFromFile(1); svxpar->set_GeometryFileName("svxPISA.par"); svxpar->set_OffsetVtxToCnt(-0.124,-0.279,0.0); Svxpar->set_OffsetEastToWest(0.0451,0.0119,0.0030); svxpar->set_BeamCenter(0.163,-0.1362);

1st iteration for 2nd step.

1st iteration for 2nd step.

1st iteration for 2nd step.

1st iteration for 2nd step.

1st iteration for 2nd step.

2nd iteration for 2nd step.

2nd iteration for 2nd step.

2nd iteration for 2nd step.

2nd iteration for 2nd step.

2nd iteration for 2nd step.

Step 3 : Offset fine tune using physics data Data set: Physic (field-on) data Macro: Fun4All_VTX.C for production read_evttree_mkpara_richcut_new0.C read_evttree_mkpara_ver2.h draw_mkpara_richcut.C Source: SvxAlignment.cc/h Beam center & EastToWest offset calibration Alignment ladder by ladder in φ , z and r Didn’t get final results for beam center & fine tune offsets calib yet. -> show you test results.

1) Beam center & fine tune offset Should calculate beam center and offset in physics (field-on) data. First, In production (Fun4All_VTX) macro, let’s use beam center and offset parameters by 0-field data corresponding to physics data we are using. SvxParManager *svxpar = new SvxParManager(); svxpar->set_ReadGeoParFromFile(1); svxpar->set_GeometryFileName("svxPISA.par"); svxpar->set_OffsetVtxToCnt(0.409232,0.0168409,0.0); Svxpar->set_OffsetEastToWest(0.003539,-0.0159371,0.0); svxpar->set_BeamCenter(-0.115619,0.197408); Parameters from 0-field run : 406541

1) Beam center & fine tune offset Should calculate beam center and offset in physics (field-on) data. First, In production (Fun4All_VTX) macro, let’s use beam center and offset parameters by 0-field data corresponding to physics data we using. Draw EastToWest offset and primary vertex-BC and then get mean values from gaussian fitting Mean = 0.004592 cm Mean = -0.006168 cm Didn’t analyze all events I have (~7M). Physics RUN : 372412, #events : 1M

1) Beam center & fine tune offset Should calculate beam center and offset in physics (field-on) data. First, In production (Fun4All_VTX) macro, let’s use beam center and offset parameters by 0-field data corresponding to physics data we using. Draw EastToWest offset and primary vertex-BC and then get mean values from gaussian fitting. Set parameters and then run production macros with modified parameter. New parameter = old parameter from 0-field run + mean value from gaussian fitting SvxParManager *svxpar = new SvxParManager(); svxpar->set_ReadGeoParFromFile(1); svxpar->set_GeometryFileName("svxPISA.par"); svxpar->set_OffsetVtxToCnt(0.409232,0.0168409,0.0); Svxpar->set_OffsetEastToWest(0.003539+0.00459179,-0.0159371-0.00186212,0.0-0.0205749); svxpar->set_BeamCenter(-0.115619-0.00616782,0.197408-0.00535163);

1) Beam center & fine tune offset This is 1st iteration for beam center and offset finetune calibrations. Mean = 0.004592 -> 0.004398 cm Mean = -0.006168 -> -0.003436cm