Super Bigbite Spectrometer (SBS) Status

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1 Super Bigbite Spectrometer (SBS) Status Mark Jones SBS Program manager 1/18/2017 Hall A Jan 2017 Meeting 1

2 Outline Status of SBS project Overview of experiments Status of SBS equipment SBS equipment covered in subsequent talks: GEM detectors SBS Magnet, beamline and hall infrastructure SBS Monte Carlo and software 1/18/2017 Hall A Jan 2017 Meeting 2

3 Projects WBS 1 SBSBAS WBS 2 SBSNFF Overview of SBS Program Started in Oct 2012, as a DOE funded program consisting of three projects. Three form factor experiments were the goal of the SBS program, subsequently other PAC approved experiments have expanded the program. WBS 3 SBSPFF Apparatus SBS Magnet with platform and power supply, beamline upgrades. Hall LCW and power upgrades Coordinate Detector HCAL trigger Detector frames, Electronics Hut, Lead shielding Rear GEM tracker Experiment GEn, GMn, GEp GEn, GMn, GEp SBS Collaboration is a working group within the Hall A collaboration whose purpose is to ensure the successful running, analysis, and publication of approved experiments which will use all or parts of the equipment of SBS. Welcome new institutions and members. Weekly meetings are held. Presentations are archived. SBS Coordinating Committee has members representing all experiments and is presently chaired by Seamus Riordan. Yearly SBS meetings and the agenda of last July s meeting is a good overview of SBS program 1/18/2017 Hall A Jan 2017 Meeting 3 GEp

4 SBS project status Yearly DOE reviews in November. End of SBS program in January Closeout in Spring /1/2014 1/1/2015 1/1/ /31/ /31/ /31/ /31/2019 Jan 2014 Jan 2015 Jan 2016 Jan 2017 Jan 2018 Jan 2019 Jan 2020 WBS 1 (started 10/1/2012) Completed Jan 2016 WBS 2 (started 10/1/2013) Complete Jan 2017 WBS 3 (started 10/1/2012) Complete Jan 2017 INFN Front GEM (GMn,GEn,GEp) HCal (GMn,GEn,GEp) GRINCH (GMn,GEn) Helium target (GEn) ECal (GEp) SBS GMn be ready for 2019 run period with GEn and GEp ready to follow. Have requested ERR for GMn in Spring /18/2017 Hall A Jan 2017 Meeting 4

5 Overview of SBS experiments Form factor measurements Neutron G M Neutron G E /G M Proton G E /G M Polarized Helium SIDIS Tagged Deep Inelastic Scattering. Encourage new proposals using SBS equipment 1/18/2017 Hall A Jan 2017 Meeting 5

6 Neutron G M experiment LD2 target BigBite Hadron calorimeter 1/18/2017 Hall A Jan 2017 Meeting 6

7 Neutron G E /G M experiment Polarized 3He target BigBite Hadron calorimeter 1/18/2017 Hall A Jan 2017 Meeting 7

8 Proton G E /G M experiment 1/18/2017 Hall A Jan 2017 Meeting 8

9 Nucleon Form factor experiments 1/18/2017 Hall A Jan 2017 Meeting 9

10 Polarized Helium SIDIS experiment Polarized 3He target 1/18/2017 Hall A Jan 2017 Meeting 10

11 Polarized Helium SIDIS 1/18/2017 Hall A Jan 2017 Meeting 11

12 Tagged Deep Inelastic Scattering 1/18/2017 Hall A Jan 2017 Meeting 12

13 Tagged Deep Inelastic Scattering 1/18/2017 Hall A Jan 2017 Meeting 13

14 Tagged Deep Inelastic Scattering 1/18/2017 Hall A Jan 2017 Meeting 14

15 Tagged Deep Inelastic Scattering 1/18/2017 Hall A Jan 2017 Meeting 15

16 Overview of equipment RICH detector for the SIDIS experiment Radial TPC for the TDIS experiment 1/18/2017 Hall A Jan 2017 Meeting 16

17 Rear GEM chambers WBS3 project was a contract with University of Virginia to build forty GEM modules. Each GEM module is 50x60cm 2 with four modules making a chamber. For neutron FF experiments: one chamber will be used in BigBite. For proton FF experiment: ten chambers will be used in a double polarimeter. 40 GEM modules have been built and passed an in-situ testing using a high intensity X-ray source. INFN readout electronics have been purchased and tested at UVa. Chamber of 4 modules in frame 1/18/2017 Hall A Jan 2017 Meeting 17

18 Front GEM Chambers INFN groups at Rome, Catania, Genoa and Bari Each GEM module is 40x50cm 2 with three modules making a chamber. For neutron FF experiments: four chambers will be used in BigBite. For proton FF experiment: six chambers will be used as the front tracker. Two chambers are at JLab. Modules for two more chambers to arrive at end of January with the final two chambers arriving in middle of Chamber of 3 modules in carbon frame 1/18/2017 Hall A Jan 2017 Meeting 18

19 Coordinate Detector WBS2 project was a contract with Idaho State University. Major contributions: Yerevan, St. Mary s, Glasgow, INFN-Catania, Kharkov For neutron FF experiments: Proton tagger placed in front hadron calorimeter For proton FF experiment : Vertical position detector placed in front of electron calorimeter Two planes of scintillator covering 102x294 cm 2. Individual bars 51x0.5x4cm 3 Extruded scintillator with center hole for WLS fiber. 16 channel NINO chip amp/discriminator cards from Glasgow U. All modules complete and commissioning with cosmics is underway. Groups of 14 bars with WLS 1/18/2017 Hall A Jan 2017 Meeting 19

20 GRINCH North Carolina A&T and College of William & Mary Gas Cherenkov Threshold detector. Cylindrical mirrors and 510 PMT array. 16 channel NINO chip amp/discriminator cards from Glasgow U. All parts for GRINCH are at JLab and being assembled. 1/18/2017 Hall A Jan 2017 Meeting 20

21 BigBite Hodoscope Glasgow University Used in neutron FF experiments 90 EJ200 scintillator bars. 60x2.5x2.5 cm 3 Bars have PMTs on each end. Scintillator bars are at JLab. 16 channel NINO chip disc/amp cards Example of NINO card operation 1/18/2017 Hall A Jan 2017 Meeting 21

22 Hadron Calorimeter Carnegie Mellon and INFN-Catania Used in all FF experiments Total of 288 modules with 235 modules at JLab. Absorber 1/18/2017 Hall A Jan 2017 Meeting 22

23 Electron Calorimeter Collaborators: JLab, Yerevan, Stony Brook U., Norfolk State, James Madison and North Carolina Central Used in proton FF experiment Constant thermal annealing to combat radiation damage to lead glass. Small C16 test in Hall A with beam showed that concept would work. At SBU, comparison between COMSOL calculations and prototype setup were successful. At SBU developed the technical and mechanical techniques for full scale version. NCCU received a NSF grant to build the full scale version 1700 lead glass blocks 1/18/2017 Hall A Jan 2017 Meeting 23

24 Polarized Helium Target University of Virginia and JLab 60 cm long cell to take 60uA beam with 60% polarization. Concept Design Report has been written. Progress in metal/glass end windows, dual pumping on target cell etc. 1/18/2017 Hall A Jan 2017 Meeting 24

25 Construction ending and equipment is arriving in Testlab 1/18/2017 Hall A Jan 2017 Meeting 25

26 Summary Detector systems are near completion of construction phase New institutions welcome to join the SBS collaboration Work in proceeding in following areas: Integration of detectors Commissioning of detectors GEANT simulation and software development DAQ and electronics 1/18/2017 Hall A Jan 2017 Meeting 26

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