Current Status of Datataking

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Current Status of Data-taking

• Data-taking
• High quality data in 2004 (but crate controller
  problems)
• No 303 background (cost 25 of livetime)
• Veto rates lower than 2003, much lower than
  2001/02
• Origin of whoppers (gt25 Hz) still unknown
• Need to do systematic comparison of 00-04 data
• Frequency domain, as well (corrine?)
• Many tweaks to reconstruction software online
  DAQ, basically unchanged for last 2-3 years
• Since Dec. 02 floating thresholds to maintain
  gt90 livetime.

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HSV board
EVALUATE singles rates for planned RICE-II,
also Fast (1 us) vertex estimation rejection of
anthropogenic noise. Installed Dec.03.
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Hot channel singles rates

Singles Rate (11 MHz)
2004 Julian Day
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Data Analysis

• Plan to update ICRC03 result with 2003 data
  (analyzed through Oct. 03) 2004 data
• Micro-BH analysis close to done
• Parallel GRB analyses on 2002 data (Canterbury)
  and 2003 data (KU)
• Needs a lot of work
• Air shower analysis
• DZB modeling of muon brems?expect NO 4-hit
  coincidences in our data (1 1-hit evt/yr w/
  SN11)
• May pull out using coincidences with SPASE
  (unlikely)
• Signal due to air showers stopping at surface

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Event Recon Efficiency Evaluation

• Philosophy Make kinematic cuts first, then do
  waveform correlation last matched filter based
  on a) Tx?Rx events, b) radiomc, c) thermal hits

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www.lns.cornell.edu/dzb/tem/rice03prd.ps
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Shower Modeling

• Much work done on re-evaluating Veff with correct
  ray tracinggtexpect 25 loss of Veff
• Developed a neutrino generator (pre-ANIS) now in
  process of implementing ANIS to compare
• Verify hadronic showerEM shower _at_Egt1 PeV

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Old vs. New Veff (/2pi illumination)
Upshot corrected ray tracing costs 30 in Veff
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Politics, politics, politics

• NSF supporting
• Development of RICE-II antennas
• Based on LABRADOR chip (infinitegoogle thanks to
  Peter and Gary)
• Board layout done, being populated
• Can fit in either dry r6cm hole or IceCube
  borehole
• All revved up with nowhere to go need a
  separate, dedicated proposal to support
  hole-drilling (glaciology proposal submitted to
  NSF in June04 if funded, use holes for acoustic
  detectors as well)

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Schematic Diagram Cluster Electronics
http//www.people.ku.edu/jledford/Rice2_Files/Doc
uments/RICE_DAQ2_Spec_9_13_04.pdf
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RICE2 DAQ board (Oct 9, 2004)
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05-06

• Plan to bring antenna cluster to pole, deploy,
  take data and correlate with info from existing
  array.
• Received transmitter times reasonable?
• Alternately, take two clusters to pole, and run
  independently pulse from surface or in borehole
• (will need to excavate boreholes in any case).

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Radioglaciology plans

• ?NSF radioglaciology at Taylor Dome AND S.P
• 3 Boreholes to be drilled _at_each site, baseline 1
  km, to 300 m, horizontal broadcasting
• Birefringence
• Attenuation length(Temp)
• n(z)
• Layer studies
• Acoustic tests ancillary science (retain cores)
• Vostok mentioned (CRDF now funded)
• Overlap with UCLA ground calibration objectives

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Scattering off internal layers?

• Internal layers due to seasonal (yearly
  crusting) or sporadic (volcanic deposition of
  salts, e.g.)
• In principle, scattering effects greatest at
  glancing angles (Fresnel coefficients
  cos(theta)?0 in following plots)
• Might guess that, if lambdagtgttlayer, scattering
  effects small (DS)
• Have compared model (just using Fresnel),
  assuming dn0.001 every meter, with data.

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Layer study (MC)
Vertical distance b/w Rx/Tx2m
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Data (02-03, 1 ns signal?Tx)
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Attenuation length measurements
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Summary of Deployment Options

• Co-Deployment with acoustic modules in IceCube,
  06-07
• Wal-Mart ANITA elevated CCCP balloon at Vostok
  (CRDF proposal w/ Zheleznykh)
• Partial deployment in dry holes to-be-drilled for
  SP-component of radioglaciology proposal
• Dedicated dry holes (proposal due June 05),
  beginning 06-07

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BIG open questions with RICE-II

• How reliable is optical fiber (single-mode) and
  what is past AMANDA experience (infant mortality,
  or progressive)?
• Albrecht 5-10 failure rate
• Improve with better jacketing/reinforcement?
• Can we achieve ns-timing?
• Clock synchronization from central clock on
  surface requires minimization of timing jitter
• OTDR transmitter calibrations, on-line
• To what extent can we use/share ICE3/acoustic
  software?
• Where do we put it?

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Pre-results / over-optimistic BH model
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Low Veto Rates (1st half 2003)
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HSV vs. old RICE DAQ
Green Number of HSV vetoes per 100 minutes Red
veto rate inferred from hits files (scale
arbitrary)
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The POWER of the HSV

• Began looking at HSV output in detail c. 3/15
• Qual/Quantitatively, find
• Using ability of HSV to duplicate functionality
  of MALU/4-hit coincidence trigger find gt99
  overlap in identified triggers b/w HSV vs. MALU
• On occasion, some channels are running at gt1 Mhz
• See (as expected) correlations between singles
  rates (50 of time, see correlated
  increase/decrease of singles rates)
• Inserted and began testing veto patterns
  simultaneous with failure of TDC (unfortunately)

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Plans for Pole, 04-05, and beyond

• 04-05 Repair DAQ (failed TDC), so can get
  meaningful info from HSV module
• Do dry run of shallow Tx-in-borehole transmission
  to above-surface Rx P(Rx) as f(zTx, zRx, rTx,Rx)
• Had hoped for help from Amy C looking unlikely.
• Probe surface effects, verify density contrast at
  surface.
• Try to understand sigshape diffs (Steve B, DZB)
• 1ns duration signal shapes relatively constant as
  f(z(Tx))
• Longer-duration (100 ns) signal shapes show
  significant changes as f(z(Tx)) (leading edges
  qualitatively more similar)
• Multi-path effects