HPS Summary Costs, Manpower, Schedule John Jaros Searching for a New Gauge Boson at JLab Jefferson Laboratory September 20, 2010

In Summary HPS Setup HPS relies on a high rate, forward spectrometer, with good acceptance. Si microstrip detectors provide precision vertexing and tracking inside a 1 Tesla dipole. A PbWO 4 crystal EM calorimeter provides fast triggering and electron ID. A muon detector provides a complementary trigger, and doubles the statistics at high mass. September 20, 20102

In Summary 100 % CEBAF duty cycle, excellent beam quality, plus >40 MHz readout capability gives HPS access to the high luminosity data sets needed to search for heavy photons. The Silicon Vertex Tracker will provide 1% x p (GeV/c) momentum and ~1mm vertex resolution, continuous readout, and 2ns timing capability. The PbWO 4 /Shashlyk Ecal will provide the trigger and electron ID using 250 MHz FADCs. DAQ can handle a 50kHz trigger rate, 250 MB/sec data transfer rate. It’s build on Jlab FADCs and SLAC ACTA SVT readout. 3September 20, 2010

GEANT4 Monte Carlo has been used to determine trigger rates and establish tracking and vertexing performance for physics events in the presence of full beam backgrounds. Detailed estimates of the HPS physics reach show: HPS will search a unique small coupling region of heavy photon parameter space with unparalleled sensitivity, obtained by combining invariant mass and decay vertex information. At the same time, using invariant mass information alone, HPS will explore the region of moderate couplings over the mass range MeV. Sensitivity to decay vertices gives HPS the unique opportunity to discover “true muonium”. In Summary September 20, 20104

So, What does it Cost? Costing Assumptions “Donations” lower the HPS cost Fermilab ~150 Hamamatsu Si microstrip detectors SLAC 18D36 H Magnet JLab PbWO4 crystals, magnets, power supplies, DAQ infrastructure, Data Storage Collaborators Engineering and design for Ecal and Muons Lab Indirects have been included in Labor Rates Contingencies have been included SLAC 30% Labor 35% M&S 10-15% Costed items JLab 20% Labor 25% M&S 10-15% Costed items HPS makes use of ongoing Jlab R&D for 12 GeV Upgrade Detectors Engineering Designs Needed Many Systems Already Engineered

Costing Methodology : HPS WBS September 20, 20106

Beamline Items √Chicane magnets and quads (J) √Magnet power supplies (J) √Analyzing magnet (S) Girders, BPMs, Harps, Correctors Support Stands Beam Pipes and Windows Refurbish Analyzing Magnet Power Cables Installation Engineering and Design.4 FTE Technician 1.6 FTE TOTAL $590k September 20, 20107

Silicon Vertex Tracker Items √Si microstrip sensors (F) Sensor modules CF Support Box Vacuum Chamber Readout Cables Power, Vacuum, Temp Systems Engineering and Design 0.6 FTE Technician 0.7 FTE TOTAL $830k September 20, 20108

ECal Items √PbWO4 crystals/APDs/amps (J) √Shashlyk towers or Pb Glass (J) PbWO4 Connection Board & Motherboards PMTs for Shashlyk or Pb Glass Cables and Connectors Temp Enclosure Box Vacuum Box Support Stand Engineering and Design* 1.0 FTE Technician (fab and test).25 FTE TOTAL $260k * Engineering and Design by JLab User. September 20, 20109

Muon System Items √HV supplies (J) Fe Absorber Scintillator and Fibers PMTs and dividers Cables and splitters Support Stand Engineering and Design* 1.0 FTE Technician 0.1 FTE TOTAL $180k * Engineering and design by JLab User September 20,

Ecal and Muon DAQ and Trigger Items √Discriminators, TDCs, and crates (J) FADCs Crate Trigger Processor Board Sub System Processor Board Trigger Interface Board Signal Distribution Board CPU Board VXS Crates Cables and Misc Engineering and Design 0.1 FTE Technician 0.3 FTE TOTAL $600k September 20,

SVT DAQ Items Hybrid and APV25s Readout Board Trigger Interface Board ATCA Crate CPU Board Server Engineering and Design 0.9 FTE Technician 0.6 FTE TOTAL $650k September 20,

Total Costs Breakdown by Sub System $ JLab SLAC Beamline & Installation 590k 405k 185k Vertex Tracker 830k 0k 830k ECal 260k 260k 0k Muon 180k 180k 0k Ecal DAQ/Trigger 600k 600k 0k SVT DAQ 650k 0k 650k TOTAL $3110k $1445k $1665k September 20,

Total Manpower Breakdown September 20, Note: This is the manpower breakdown assumed in the costing. We expect a much larger contribution from physicists and grad students in the actual construction, testing, and installation phases of the experiment. In FTE years

Schedule before Shutdown Goal: Take beam Spring 2012 Understand beam control, trigger rates, and occupancies. Test critical assumptions and Monte Carlo simulations. Have time, before the 12 GeV data taking, to react to surprises. Steps: 2011 Spring (during CLAS photon calibration and running) Test FADCs and readout Test SVT detector module and readout 2011 Downtime (May-November, 2011) Install major beamline items: magnet, vac chambers Spring 2012 Complete beamline installation Install detectors Commission DAQ Commission beam, check quality and stability Test trigger and occupancy calculations, detector performance 1 Week Test Run September 20,

Schedule after Shutdown Downtime mid 2012-end 2013| Remove HPS beamline for CLAS decommissioning and eventual re-installation Evaluate performance; React to surprises Analyze Test Run Data Major Data Taking in the 12 GeV Era. Detailed plan being developed. Re-install and re-commission HPS Take HPS data for ~3 months. Run at several energies to optimize reach and mass range. Take HPS true muonium data for ~1.5 months September 20,

Conclusions Total HPS estimated cost $3.1M. Considerable savings from Fermilab donation, use of existing Jlab and SLAC apparatus, and engineering and design by collaborators. Goal is to install HPS in Spring 2012 for test run. Major data taking would take place in the 12 GeV era. Being ready in Spring 2012 is possible, but depends on funding being ready soon to begin ED&I on long leadtime items. Hybrid design, beamline design, vac chamber construction need keep alive funds ~now. Major funding needed ~Jan 2012 September 20,

Searching for heavy photons provides Jlab with an exciting and topical research program with the potential for fundamental discoveries. Heavy photon searches must be pursued aggressively if this potential is to be realized. HPS extends the search into a unique range of heavy photon parameter space with unparalleled sensitivity, exploiting both separated vertex and invariant mass signatures. September 20, Illuminating Dark Matter