Hall D Update. E.Chudakov 1. UGBoD meeting, January Hall D Group Leader. E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 1 / 24

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1 E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 1 / 24 Hall D Update E.Chudakov 1 1 Hall D Group Leader UGBoD meeting, January 2017

2 E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 2 / 24 Outline Since June Collaboration meeting in October 2016 Spring 2016 (engineering run) results: 9 talks presented at DNP 2016 in Oct days technical run in Dec 2016 at 11.7 GeV 1 Hall D overview 2 Collaboration and staff 3 Physics program and schedule 4 Results and development

3 Hall D E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 3 / 24

4 The GlueX Collaboration E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 4 / 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, W&M, Wuhan, and Yerevan Physics Institute. Over 100 collaborators from 25 institutions.

5 ENP Budget/Staff Plans for Hall D E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 5 / 24 Plans for upgrades and new equipment: Capital equipment (> $0.5M): DIRC FY16 - extended to FY19 FCAL upgrade FY18-FY21 planned Smaller projects (<$0.5M): L3 farm FY16-FY18? Hall D Staff: Scientific group: 12 staff scientists and 3 postdocs Replacing Justin Stevens: put on hold by the management Technical group: 1 mechanical engineer, 1 designer and 6 techs

6 Physics Program E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 6 / 24 Proposal/ Sta- Title Beam PAC experiment tus days # E A Mapping the Spectrum of Light Quark 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 strange final states with GlueX in Hall D E A- Measuring the Charged Pion Polarizability 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 E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 6 / 24 Physics Program Established schedule Proposal/ Sta- Title Beam PAC experiment tus days # E A Mapping the Spectrum of Light Quark Fall 2018 Fall? 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 strange final states with GlueX in Hall D E A- Measuring the Charged Pion Polarizability 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 E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 6 / 24 Physics Program Established schedule Intention Proposal/ Sta- Title Beam PAC experiment tus days # E A Mapping the Spectrum of Light Quark Fall 2018 Fall? 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 Fall fect An initial study of hadron decays to strange final 2019 states Spring with GlueX in Hall D E A- Measuring the Charged Pion Polarizability in the γγ π + π Reaction C A A study of 2019 meson Fall 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

9 Physics Program E.Chudakov UGBoD meeting, Jan 2017 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 LOI Activities: K L Workshop 2016 Feb participants; YSTAR Nov LOI Workshop: Nuclear Photoproduction with GlueX 2016 Apr participants LOI PAC: encouragement to submit a proposal LOI PAC: requirement for the accuracy evaluation, GlueX coll. vetting LOI PAC: recommendation to wait a few years

10 Selected Results from the Engineering 0.4 Run Σ Σ Σ asymmetry for exclusive π 0 0 and η Beam asymmetry of π 0 and η photoproduction (a) GlueX 8.4<E γ <9.0 GeV SLAC E γ =10 GeV γp pπ t (GeV/c) Prepared for PRL 7 days of running at 10 MHz in the (b) γp pη Under Consistent collaboration with previous review measurements peak Consistent Figure with unity, 5.1: no Beam t dependence asymmetry 1 10 for 12 (top) tagged ~ p! photons 0 p and (bottom) in peak on ~ p! p ( Don t observe previous diffraction SLAC [6] dip results at -t ~ at0.5 E target GeV =10 GeV (vector (blue Reggeon open circles). dominance) First GlueX paper: under collaboration review 1 Preliminary Laget [5,6] JPAC [7,19] Donnachie [8] Goldstein [4] E.Chudakov 0 UGBoD meeting, Jan 2017 Hall D Status 8 / 24 Σ (b) GlueX 8.4<E γ <9.0 GeV SLAC E γ =10 GeV J/Ψ Production γp pη Preliminary -t (GeV/c) Laget [5,6] JPAC [7,19] Donnachie [8] Goldstein [4] Luminosity and statistics -t (GeV/c) 100k ω π + π π 0 56

11 Unexpected: Beam Polarization Beyond the Peak ρ and π 0 asymmetries: runs PΣ ρ π Still see low Eɣ residual polarization with lower accidental rate (GeV) E γ Conditions: 50 um diamond, 5.0 mm collimator, 2 ns bunch spacing Beamline Meeting Justin Stevens, E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 9 / 24 13

12 Reviews E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 10 / 24 η-primex Readiness Review for running in 2018 Spring, Jul 20. Not passed - have to come later for running in 2016 Fall Main issues: Uncertainty in the plans to build the ComCAL Target group has no time/resources before 2018 to develop and build a Helium target to the new specs Since the review: progress on the ComCAL plans; working on the target specifications L3 for GlueX-III - high intensity, mini-review on Jul 22. Not passed, Main issues and progress in solving them: Considerable growth of the event size due to the accidentals Too high data rate for the VME bus from many crates Since the review: a considerable progress done in reduction of the projected trigger rate and the event size; Tests done during the December 2016 run Software Review, Nov Passed

13 December 2017 Run: 6 days for various tests DAQ: New firmware for the front-ends and trigger modules; new online configurations OK DAQ: testing performance at higher rates New diamond radiator mm 3 50 khz OK OK Lower voltage for TOF (too high current in the PMTs) data taken Polarimeter measurement at E beam < 6 GeV : 3σ confirmation Problems found and will be addressed before the Spring 2017 run: DAQ: a hard-to-find error in one of the FADC250 at > 30 khz DAQ: limitations at the data recording level (RAID etc) at > 50 khz Solenoid trips at ramping up caused by voltage spikes in coil 2 - mitigated by lower ramp rates E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 11 / 24

14 Outlook E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 12 / 24 Next runs - schedule updated 2017 Jan,30 - Mar,22 GlueX-I physics 2017 Oct,2 - Dec,20 GlueX-I physics (132 days in CY 2017) Next hardware development TOF - bases with amplification: Summer 2017 DAQ for 5 beam intensity: L3, links, RAID: DIRC: frame (IU), optical boxes (MIT) ComCal for PRIMEX (100 PbWO crystals) 2018 Helium target for PRIMEX: conceptual design 2017

15 APPENDIX E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 13 / 24

16 Hall D/GlueX Beamline Tagger Magnet Hodoscope (TAGH), µ-scope (TAHM) γ-polarimeter 12 GeV e beam µa 20 µm diamond: coherent <25 µrad Collimation r <1.8 mm at 80 m Coherent peak GeV P 40% 2.2 µa 100 MHz γ Energy/polarization measured: Tagger spectrometer σ E /E 0.1% Pair spectrometer: spectrum σ P /P 5% tagged collimated E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 14 / 24 E γ GeV GeV 100 MHz P 40%

17 Hall D/GlueX Spectrometer and DAQ E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 15 / 24 GlueX Resolutions h ± : σ p /p 1 3% γ: σ E /E 6%/ E 2% Acceptance 1 < θ < 120 diamond wafer electron beam tagger magnet photon beam tagger to detector distance is not to scale start counter barrel calorimeter target 30 cm LH 2 electron beam B = 2.0 T time-of -flight superconducting magnet forward calorimeter central drift chamber forward drift chambers Detectors CDC, FDC BCAL, FCAL TOF, ST Plans to add 2017 L DIRC Photoproduction γp 15 khz for a 100 MHz beam Beam 10 MHz/GeV: inclusive trigger 20 khz DAQ tape Beam 100 MHz/GeV: inclusive trigger 200 khz DAQ L3 farm tape

18 E.Chudakov UGBoD meeting, Jan 2017 Hall D Status 16 / 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 10 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 2018 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 2009 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 $110 k for DAQ). As the development of well, small size (5 cm 5 cm) samples will be available by the end o