Hall D Status. E.Chudakov 1. UGBoD meeting, June Hall D Group Leader. E.Chudakov UGBoD meeting, June 2015 Hall D Status 1 / 24

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1 E.Chudakov UGBoD meeting, June 215 Hall D Status 1 / 24 Hall D Status E.Chudakov 1 1 Hall D Group Leader UGBoD meeting, June 216

2 E.Chudakov UGBoD meeting, June 215 Hall D Status 2 / 24 Outline Since January Successful commissioning run in Feb-Apr 216 Collaboration meeting in May 216 Progress with calibration and data analysis 1 Hall D overview 2 Physics program and schedule 3 Collaboration and staff 4 Commissioning results

3 Hall D/GlueX Beamline Tagger Magnet Hodoscope (TAGH), µ-scope (TAHM) γ-polarimeter 12 GeV e beam µa 2 µm diamond: coherent <25 µrad Collimation r <1.8 mm at 8 m Coherent peak GeV P 4% 2.2 µa 1 MHz γ Energy/polarization measured: Tagger spectrometer σ E /E.1% Pair spectrometer: spectrum σ P /P 5% tagged collimated E.Chudakov UGBoD meeting, June 215 Hall D Status 3 / 24 E γ GeV GeV 1 MHz P 4%

4 Hall D/GlueX Spectrometer and DAQ E.Chudakov UGBoD meeting, June 215 Hall D Status 4 / 24 GlueX Resolutions h ± : σ p /p 1 3% γ: σ E /E 6%/ E 2% Acceptance 1 < θ < 12 diamond wafer electron beam tagger magnet photon beam tagger to detector distance is not to scale start counter barrel calorimeter target 3 cm LH 2 electron beam B = 2. T time-of -flight superconducting magnet forward calorimeter central drift chamber forward drift chambers Detectors CDC, FDC BCAL, FCAL TOF, ST Plans to add 217 L3 218 DIRC Photoproduction γp 15 khz for a 1 MHz beam Beam 1 MHz/GeV: inclusive trigger 2 khz DAQ tape Beam 1 MHz/GeV: inclusive trigger 2 khz DAQ L3 farm tape

5 Hall D E.Chudakov UGBoD meeting, June 215 Hall D Status 5 / 24

6 Physics Program E.Chudakov UGBoD meeting, June 215 Hall D Status 6 / 24 Proposal/ Sta- Title Beam PAC experiment tus days # E A Mapping the Spectrum of Light Quark 12 3 Mesons and Gluonic Excitations with Linearly Polarized Photons E A- A Precision Measurement of the eta Radiative Decay Width via the Primakoff Ef- fect E A An initial study of hadron decays to 2 4 strange final states with GlueX in Hall D E A- Measuring the Charged Pion Polarizability 25 4 in the γγ π + π Reaction C A A study of meson and baryon decays to strange final states with GlueX in Hall D C C2 Eta Decays with Emphasis on Rare Neutral Modes: The JLab Eta Factory(JEF) Experiment 42

7 Physics Program E.Chudakov UGBoD meeting, June 215 Hall D Status 6 / 24 Preliminary schedule Proposal/ Sta- Title Beam PAC experiment tus days # E A Mapping the Spectrum of Light Quark Fall 218 Spring Mesons and Gluonic Excitations with Linearly Polarized Photons E A- A Precision Measurement of the eta Radiative E A Decay Width via the Primakoff Ef- 218 Spring 218 Fall? fect An initial study of hadron decays to 2 4 strange final 219 states Spring with? GlueX in Hall D E A- Measuring the Charged Pion Polarizability 25 4 in the γγ π + π Reaction C A A study of meson and baryon decays to strange final states with GlueX in Hall D C C2 Eta Decays with Emphasis on Rare Neutral Modes: The JLab Eta Factory(JEF) Experiment 42

8 Physics Program E.Chudakov UGBoD meeting, June 215 Hall D Status 7 / 24 Proposal/ Sta- Title Beam PAC experiment tus days # LOI Physics with secondary KL beam 43 LOI ω-production on nuclei 43 LOI Lepton Universality in Bethe-Heitler production of lepton pairs 44 LOI Probing short-range nuclear structure 44 and dynamics LOI Target helicity correlations in GlueX 44 Workshops on Physics Program 216 Feb 1-3: K L Workshop - about 6 participants 216 Apr 28-29: Nuclear Photoproduction with GlueX - about 3 participants 216 May: GlueX Analysis

9 The GlueX Collaboration E.Chudakov UGBoD meeting, June 215 Hall D Status 8 / 24 Arizona State, Athens, Carnegie Mellon, Catholic University, Univ. of Connecticut, Florida International, Florida State, George Washington, Glasgow, GSI, Indiana University, ITEP, Jefferson Lab, U. Mass. Amherst, MIT, MEPhi, Norfolk State, North Carolina A&T, Univ. North Carolina Wilmington, Northwestern, Santa Maria, University of Regina, and Yerevan Physics Institute. Over 1 collaborators from 23 institutions. Others are planning to join (Wuhan Uni., China).

10 ENP Budget/Staff Plans for Hall D E.Chudakov UGBoD meeting, June 215 Hall D Status 9 / 24 Plans for upgrades and new equipment: Capital equipment (> $.5M): DIRC FY16-FY18 set FCAL upgrade FY17-FY2 planned Smaller projects (<$.5M): L3 farm FY16-FY17? Hall D Staff: Scientific group: 13 staff scientists and 2 postdocs 3-rd postdoc: search in progress Justin Stevens is leaving for W&M in Aug 216: search started Technical group: 1 mechanical engineer, 1 designer and 6 techs

11 Hall D/GlueX Commissioning Status Spring 216 run Feb 1 - Apr GeV electron beam, 1-2 na (radiator dependent) Beam instrumentation commissioned (Fast Feedback) Solenoid 12 A 2.5 months 1345 A (GlueX optimum) one week Diamond radiators: 5 µm - old, 3 µm - new DAQ: 3 khz - sufficient for GlueX-I Data flow 6 MB/s = 2 of the initial estimate Beam studies and tuning Trigger studies and tuning Data for early physics results GlueX commissioning completed 24 G events recorded Number of Events Collected / Polarization Polarization Unpolarized Total Generated: April 25, 216 Days 2 Since Start 4 of Run 6 E.Chudakov UGBoD meeting, June 215 Hall D Status 1 / 24

12 Hall D/GlueX Beam: Coherent Bremsstrahlung Coherent Bremsstrahlung Shape Analysis (CBSA) Enhancement: Diamond/Amorph Degree of Polarization Run 1492: 5 μm diamond Energy (MeV) Rate crystal/amorphous P 4% Energy (MeV) Enhancement: Diamond/Amorph Run 1782: 2 μm diamond 2 Processes like γp ρ p 1.5 Degree measured of Polarization asymmetry Polarization measurements Derived from the spectrum.5 75 um converter N( )? N( ) 2 k 4 = P 6 cos(2 ) 8 PERP/PARA 1 12 N( )? + N( ) k to Energy (MeV) TPOL asymmetry, 5um diamond (J1A5) Work ongoing to better understand accidental subtraction, especially at high rates 3.5 Triple polarimeter 3 γe e + e e J1A5 (5um), 3 mm hole 1P = 31.4 ±.8% Preliminary.2.7 χ 2 / ndf 29.1 / 29 p.1127 ±.1141 p1.679 ±.157 p ± ? Runs.4 k Runs.4 448k.3 482k.2.1 E =[8.4, 9.] GeV (PS) triplet azimuthal angle [degrees] Energy (MeV) E.Chudakov UGBoD meeting, June 215 Hall D Status 11 / 24

13 Tracking Position Resolution [µm] Straw Efficiency Central Drift Chamber (CDC) d Design Resolution: 15 µm Track to Wire Distance (d) [mm] 8 mm Track to Wire Distance (d) [mm] Wire Position Resolution [µm] 3D Reconstruction Efficiency Forward Drift Chamber (FDC) Achieved Cathode Resolution: 15 µm Design Resolution for Cathodes and Wires: 2 µm Track to Wire Distance [mm] Colors Index Chambers in the Third Package x Coordinate [mm] E.Chudakov UGBoD meeting, June 215 Hall D Status 12 / 24

14 Photon Detection E.Chudakov UGBoD meeting, June 215 Hall D Status 13 / 24 Forward Lead Glass Calorimeter Barrel Lead-Scintillating Fiber Calorimeter Candidates / 2 MeV/c Design Goal Candidates / 2 MeV/c Design Goal M γγ [GeV/c 2 ] M γγ [GeV/c 2 ]

15 Event Reconstruction and Signals Observed E.Chudakov UGBoD meeting, June 215 Hall D Status 14 / 24 Events / 6 MeV/c 2 3 from 215 data γγ Invariant Mass [GeV/c 2 ] Exclusive reactions for X: γ + p X + p Events / 1 MeV/c counts /.1 GeV counts /.1 GeV from 216 data π + π - π mass M(π +π- [GeV] π ) η M(π + π π ) [GeV] γ mass π + π π Invariant Mass [GeV/c 2 ] counts /.1 GeV M(6γ) [GeV] η ω η' φ

16 Event Reconstruction and Signals Observed Reaction γ + p p + 4γ Combinations π π and ηπ M(γγ) for Pair 2 [GeV/c 2 ] M(γγ) for Pair 2 [GeV/c 2 ] ηπ ηπ π π π π ηπ ηπ M(γγ) for M(γγ) Pair 1 for [GeV/c Pair 1 2 ][GeV/c 2 ] 1 Candidates / 1 MeV/c π π Region 22 5 π π Region ηπ Region ηπ Region 2 f f 2 (127) 2 2 (127) a (98) a (98) σ/f σ/f (98) (98) a a 2 (132) 2 (132) M(4γ) [GeV/c M(4γ) ] [GeV/c 2 ] M(4γ) [GeV/c M(4γ) ][GeV/c 2 ] Candidates / 1 MeV/c 2 E.Chudakov UGBoD meeting, June 215 Hall D Status 15 / 24 Candidates / 1 MeV/c 2 Candidates / 1 MeV/c 2

17 Event Reconstruction and Signals Observed 8 M(2π γ), GeV/c2 from 216 data Five γp photons 2π γ p 5γ p b1(1235) M(π γ), GeV/c2 E.Chudakov UGBoD meeting, June 215 Hall D Status 16 / 24

18 8 in 8.4 < Eγ < 9. GeV Fit asymmetry in bins of Eɣ 2 crystal orientations at data N N? N N9 k = P2φ cos2 PΣ cos N +N9N= k + N? π+ (1 + P cos 2ψ) PΣ dσ dσdψ γ E.Chudakov π+ ψ Polarization P is preserved in ρ production. ρ -.2 π π.2 PΣ =.341 ± Polarization ρ p deg.].6 Ph P oton φ ψ Floo 1 π+.8 Integrated ove 8.4 < Eɣ < 9 Ge 12 4 olar Be Ph izat am ion Pol oton B ariz eam Plane atio np lane 2 r ρ D ρ Decay eca y Pl Plane ane dφ (1 + PΣ cos 2φ) Eγ (GeV) [GeV/c2] π+π Invariant Mass 4 Lab V] from 216 data Runs : ~38K ρ events in 8.4γp <E ɣ < 38k (1% of total) ρ 9pGeV 1 Yield / 1 MeV Events / 2 MeV/c2 Physics With Linearly Polarized Beam ρ asymmetry: 5 μm diamond (J1A5) Eγ (GeV) p UGBoD meeting, June π+ ψ φ(π + ) π+ ψ Justin Stevens, PΣ=.341 ±.7% Hall D Status 17 / 24

19 Outlook E.Chudakov UGBoD meeting, June 215 Hall D Status 18 / 24 Spring data production: 1-st pass will be finished in 2 weeks Early physics: asymmetries of π, η Next pass with improved reconstruction and calibration Get ready for the 216 Fall physics (GlueX-I) run Test solenoid at 135 A in August Optimization of the trigger UConn group continues producing diamond radiators

20 APPENDIX E.Chudakov UGBoD meeting, June 215 Hall D Status 19 / 24

21 E.Chudakov UGBoD meeting, June 215 Hall D Status 2 / 24 Future Forward Kaon Identification Present PID: TOF, de/dx, Kinematics In GlueX spectrometer, the DIRC bars will be placed right in front on photon reconstruction due to its thickness. 68 DIRC bars will b provide an angular coverage up to 11 degrees with a 1 cm gap in b side of bars will be covered by mirrors and Cherenkov lights will be Upgrade DIRC project, ENP capital budget 4 of the BaBar DIRC bar boxes New readout system Allows to study: Strangeonium and hybrids Hyperons Installation planned for 218 Figure 1 Configuration of DIRC for Glu The Focusing DIRC readout currently being developed by SLAC wi original one used in BARBAR. The new design uses focusing mi finite thickness of the bars. In addition, the use of Multi-anode PM design of the readout assembly (25 times smaller) and the faster tim to correct chromatic dispersion. As a result, the new design will im Cherenkov photon from 9.6 mrad to less than 7 mrad, thus boost th standard deviations from 3.8 GeV to 4.3 GeV. For GlueX, M 68 bars and the cost for them alone will be about $1.4 M. Furthermore, the recent development carried out by the large-area collaboration since 29 may provide a very attractive alternative approach is to apply micro-channel plate (MCP) technology to pro excellent space and time resolution. These MCP-PMTs can provid ps), similar spatial resolution compared to MaMPT at a much lower detector alone, another $11 k for DAQ). As the development of well, small size (5 cm 5 cm) samples will be available by the end o