IceCube IceCube Deployment Monitoring Deployment Monitoring

System (PTS)System (PTS)

Kurt Woschnagg, Ryan BayKurt Woschnagg, Ryan Bay

UC BerkeleyUC Berkeley

IceCube Collaboration Meeting, Bartol, March IceCube Collaboration Meeting, Bartol, March 20042004

Requirements during deploymentRequirements during deployment

How deep is the How deep is the string?string?

Is it still moving –Is it still moving –

or is it . . . s***k?or is it . . . s***k? Save data for post-Save data for post-

deployment analysisdeployment analysis

Post-deployment requirementsPost-deployment requirements Analyze data:Analyze data:

drop speeddrop speed deployment speed deployment speed string stretchingstring stretching

Monitor freeze-in (p, T)Monitor freeze-in (p, T)

Ambient temperature profileAmbient temperature profile

drill

pressure

temperature

Pressure sensorsPressure sensors

Paro[scientific]0-4000 m, also temp.RS232/RS485Temperature corrected$6k

Keller0-2600 m (formerly 2000 m)Needs temperature correctionCalibration curves supplied$0.7k

• Both used in AMANDA• Specs and quotes in docushare

ThermistorsThermistors Omega, model no. 4403xOmega, model no. 4403x Working range: -80 to +75 CWorking range: -80 to +75 C Resistance (100’s kResistance (100’s kΩΩ-M-MΩΩ) ) → → temperature (using temperature (using

calibration chart)calibration chart) 0.1 degree accuracy0.1 degree accuracy Leads spliced to service wires, Leads spliced to service wires,

molded onto breakoutmolded onto breakout

Used in AMANDASpecs and quote in dosushare

Cable considerationsCable considerations Use DOM breakout locationsUse DOM breakout locations Paro: 4 wires (=2 pairs), slipringParo: 4 wires (=2 pairs), slipring Keller: 2 pairs, slipringKeller: 2 pairs, slipring Thermistors: 1 pairThermistors: 1 pair All strings: All strings:

Paro at bottom (breakout 30)Paro at bottom (breakout 30) Keller (+thermistor?) at ~1900 m (b/o 15)Keller (+thermistor?) at ~1900 m (b/o 15)

First 4 strings: First 4 strings: Additional Paro at top of instrumented section (b/o 1), Additional Paro at top of instrumented section (b/o 1),

using LC quadusing LC quad Four thermistors in bottom 400 mFour thermistors in bottom 400 m

Surface cable: no wires needed for pressure Surface cable: no wires needed for pressure sensorssensors

Stand-alone DAQ(laptop with RS232/485)

orIntegrated with drillmonitoring system

b/o 1

b/o 15

b/o 30

IssuesIssues

ResponsibilitiesResponsibilities Paro readout rate:Paro readout rate:

RS232 (300 baud) RS232 (300 baud) →→ RS485 (9600 baud?) RS485 (9600 baud?) DAQDAQ

IntegrationIntegration Data mergingData merging

Readout during freeze-inReadout during freeze-in