GEn Proton Recoil Polarimeter Components GMn Preparation Review Brad Sawatzky, Michael Kohl 1
Components for Recoil-Proton Portion Recoil proton detectors 2 packages total:» One on SBS Left» One on SBS Right Each package contains» 1x Hodoscope array timing, coarse location» 2x GEM planes tracking Inline GEMs (shared w/ ChEx GEn) 6x 'rear' GEMs» charged particle veto Active Analyzer np recoil vertex identification C-Det (Coordinate detector) 'stock' GMn configuration charged particle veto HCal 'stock' GMn configuration additional neutron id. BigBite 'stock' GMn configuration electron arm» primary trigger 2
Floor Layout Notes: Provision will be made to simplify craning in/out Beamline side GEMs + hodoscope to avoid interference with small angle SBS config. Hodoscope and Analyzer cables will run under pivot to the DAQ weldment GEM cables run to GEM racks on beam-right side of SBS (See Robin W. talk) Proton detectors GEM + Scint Analyzer Hodoscope/ Analyzer Cables 3
Required Detector Equipment Count Item Status 2 Hodoscope arrays 24+24 scint bars from (Old) BB Hadron stack 2 PMTs/bar 96 HV, signal channels) 10 'Rear' GEM planes 6 in-line with SBS detector stack 2 in front of 'left' hodoscope array (proton pol.) 2 in front of 'right' hodoscope array (proton pol.) Active analyzer 'Glasgow' active analyzer is in the current CAD model (32 channel segmented unit; in-hand) 4
Hodoscopes / Active Analyzer BigBite (old) Hadron stack bars» 24 'de' 500x86x3 mm3» 24 'E' 500x86x30 mm3 Currently in TEDF Hall A area» Very good shape» E-bars re-stacked for left plane» de-bars re-stacked for right plane Each stack: 50cm wide x 200cm Matches GEM coverage» Will need testing and remounting over Summer Fall 2020 Active Analyzer Assembled and Ready in Glasgow 5
Required Electronics/Cabling Count Item Status 6+2 F250 FADC Draw from 'NPS/LAD' FY19 plans (*) 1 C1190 TDC In hand (1+spare: Glasgow + Hall C spares) 6+2 CAMAC Discrim. 4 in hand; 4 to locate 1 VXS crate In hand (1+spare: Glasgow + Hall C spares**) CAMAC crate In hand 96+32 ch HV supply (neg) In hand 10+ Ribbon cables In hand 128 SHV cables (~100') In Hall C boxes in Phys Stor. (needs work) (***) 128 Signal cables (~100') In Hall C boxes in Phys Stor. (needs work) (***) Plan to use HV supply (252 ch) already ordered as part of NPS build up (arrives next month) (*) Could likely make do with FastBus 1881s if required (cable delays would need to be verified..) (**) VXS crate purchase in Hall C budget for FY19 order pending (***) Glasgow will support SHV and signal cable requirements if needed 6
Cables and Testbed/DAQ Multiple testbeds in ESB ideal for hodoscope checkout One available already 2nd available Summer 2019 Cables in Hall C boxes in Physics Storage ~100' from detector DAQ weldment (run under/near pivot) Needs sorting and labeling!» Spring/Summer 2019 Glasgow offered support cables from their inventory/ funds if needed SHV BNC 7
Required Infrastructure Count Item Status GEM crate rackspace Include with existing GEM Readout near SBS VXS crate rackspace 6+2 Slots FADC, 1 slot for 1190 CAMAC rackspace 6+2 Slots for Discriminators + 1 slot Controller (if not present) Stand modifications for additional GEMS and Analyzers Design nearly final, to be complete by Dec 2018. Assume JLab budget Related talks: GEM gas: Jack SBS GEMs: Kondo Weldments, Stands: Robin 8
Readout/FE Hardware Locations Count Item Status GEM crates Include with existing GEM Readout in shielded 'hut' on beam-right side of SBS support structure (moves with structure) VME/VXS crate In DAQ weldment 6+2 FADCs, 1 CAEN 1190 TDC CAMAC rackspace In HCAL racks, then ribbon DAQ weldment -OR- run RG-58 DAQ weldment 6+2 Slots for Discriminators + 2 slot Controller (if not already present) Additional Racks In hand (Phys. St; Hall C area), if needed 9
Personnel / Task List / Timeline Item People Completion Target Hodoscope Checkout Sawatzky, Kohl, Tireman (summer student) Summer 2019 Hodoscope ready for installation Sawatzky, Kohl, Tireman (summer student) Fall 2019 Collect DAQ electronics, hardware, cabling Sawatzky Dec 2018 Active Analyzer checkout Sawatzky, Hamilton, Tireman? Summer 2019 GEM materials procurement Kohl, T. Cao?? GEM construction Kohl, T. Cao?? GEM testing Kohl, T. Cao?? GEM ready for installation Kohl, T. Cao?? 10
Additional Comments Primary trigger assumed to be standard BigBite (electron) BB + SBS readout on each trigger 11