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RFI Assessment at Pole

RFI Assessment at Pole. S. Barwick, UCI ANITA meeting, UCI. RFI Assessment Team. UH: Peter Gorham, Marc Rosen, Gary Varner, … UCI: Steve Barwick, Jiwoo Nam UCB: Kurt Woschnagg(?) KU : Dave Besson. Goals. Design and gain familiarity of prototype antenna system

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RFI Assessment at Pole

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  1. RFI Assessment at Pole S. Barwick, UCI ANITA meeting, UCI

  2. RFI Assessment Team • UH: Peter Gorham, Marc Rosen, Gary Varner, … • UCI: Steve Barwick, Jiwoo Nam • UCB: Kurt Woschnagg(?) • KU : Dave Besson

  3. Goals • Design and gain familiarity of prototype antenna system • Test equipment in cold environment, evaluate robustness, ease of use, problems • Measure RFI with T=300K amps in relevant bandwidth • Measure ice attenuation with RICE transmitters

  4. Equipment (U.H) Antenna (0.2 - 1 GHz) Tripod Amplifiers (~300K)

  5. DAQ (UH) Antenna Laptop (windows and linux) Low noise amplifiers Aquiris with 2GSa/s TWR Tertiary Amp

  6. Plan: preliminary • Handcarry equipment to pole in Jan 03 • Pole Personnel: S. Barwick, Jiwoo Nam, Kurt Woschnagg(?), D.Besson(?) • Get snowmobile or Sprite, drive few km from pole (ski hut?) • Auto trigger (forced trigger by user) • Point toward and away from dome • Point toward and away from MAPO • Point up, down and toward the sun • Save 5-10 waveforms, both polarizations • Transient Impulsive trigger (between 5-10 sigma) • Similar tests as forced trigger • Save ~100 waveforms of 200kSa

  7. Plan (continued) • Attenuation studies with RICE transmitter • D. Besson: Check out and set up at pole and leave instructions for operation(?) • Start above RICE and move equipment • look for Total Internal Reflection[TIR] & surface wave • Try to measure attenuation (vs frequency?) [>300MHz, higher the better since losses are larger] • Low priority: Not likely this season, but worth thinking about for future. • Leave spare antenna and Lecroy scope connected to internet, run in coincidence with RICE. Place antenna looking down at 45 deg from location near dome, or maybe SPASE shack. • Prototype of ANITA+RICE?

  8. ANITA + AMANDA-II/RICE ANITA 1.5km 1.4km ne 1.9 km

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