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

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Presentation transcript:

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 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

Equipment (U.H) Antenna ( GHz) Tripod Amplifiers (~300K)

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

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

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?

ANITA + AMANDA-II/RICE ANITA 1.5km 1.4km 1.9 km e