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High Rate Tracking Test Beam Area

High Rate Tracking Test Beam Area. David Christian & Richard Coleman. Why us; why now?. Many next-generation experiments will require trackers capable of operation in a very high flux of particles. Intensity frontier experiments HL-LHC pixels: 1-2 GHz/cm 2

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High Rate Tracking Test Beam Area

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  1. High Rate Tracking Test Beam Area David Christian & Richard Coleman

  2. Why us; why now? • Many next-generation experiments will require trackers capable of operation in a very high flux of particles. • Intensity frontier experiments • HL-LHC pixels: 1-2 GHz/cm2 • All CERN accelerators will be shut down for more than one year starting in March 2013. • R&D Review closeout: • “Fermilab is encouraged to further develop test beam facilities and detector R&D for LHC experiment upgrades.”

  3. Location – M03 (MT3) MT3 MS3 service building

  4. Upstream Meson Cactus Plot Test Area

  5. MTest running modes • MTest has three approved beam configurations: • (low intensity) Proton mode: • Absorber in, quads off, pinhole in. • Probably not useful for most high rate testing. • Pion mode: • 2E11/spill maximum in MT3 = 40 GHz in 5 sec spill. • Absorber can be in or out; no restriction on quads. • Typical spot size is about 1 inch diameter (rates above 2.5 GHz/cm2 are achievable). • Minimum rate depends on constraints from other beam lines. • If SeaQuest is running 1E13 (hoped for), 2E9 in MT3 may be difficult (400 MHz ave; higher instantaneous). • Old Pion mode: • Absorber in. • Maximum beam energy = 66 GeV. • Low beam rate is easy.

  6. Beam Rate in MT3 • Instantaneous intensity depends on spill structure and total amount of beam delivered. • Spill structure: • Booster harmonic number = 84 • Main Injector harmonic number = 7 × 84 = 588 • A gap of at least 1 Booster batch (84) is left for abort. • Typically, max of 82 full buckets per Booster batch. •  Max of 6 × 82 = 492 full rf buckets per MI turn. • SeaQuest (& in the future, ORKA) wants spill to be as uniform as possible… great improvement expected, but duty factor > 50% is unlikely. • Duty factor = <I><I>/<I2>

  7. What needs to be done? • Remove the vacuum pipe between MT3Q1 & MT3Q2 • Move SWIC to a position just downstream of MT3Q1. • Install new two new vacuum windows. • Install a remotely moveable table for DUT? • Pull optical fiber & cables to MS3? • Designate an area in MS3 for DAQ. • Establish the procedure for scheduling users & providing the required training (MT3 is a primary beam enclosure).

  8. Summary • There is a need for a high rate tracking test facility. • CERN is developing such a facility, but the CERN accelerators will be shut down for an extended period of time starting next spring. • We can establish a test area in MT3 with the required properties with very little effort at a very low cost. • Many tests in the new area will be allow simultaneous use of MTest by experiments in MT6. • We should start work very soon so that the high rate tracking test facility is available next spring.

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