# Presentation: 242690

## String-18 New-DAQ Commissioning

- Azriel Goldschmidt
- AMANDA Collaboration Meeting Berkeley, March 2002

## Hardware Installation

- 5 TB-DAQ PCs + 1 String-DAQ PC
- 40 DOMCOM boards (for 40 DOMs), 37 in use because of bad DOMs. -KHS-
- Clock distribution unit with Rb atomic clock  and GPS input. -GTP-

## New DOM Failures

- Ch601 (DOMID 1036) started drawing too much current and burns DAQ channels.
- Ch630 (DOMID 1049) not communicable for some reason (not powered...we think).

- Further hardware measurements needed to understand what happened in these two cases. They were flawless a year ago.

## 1.  tbdaq-1 ch. 1: DOMID 1019 OM681 No fiber "by construction" Its physical location is between OM599 and OM600. 

- 2.  no daq-channl: DOMID 1036 OM601 burns DOMCOM channels (was ok until 02) cable:Q20L. (could use further debugging with an ohm meter). Not powered.
- 3.  no daq-channl: DOMID 1044 OM604 base went bad, gives 1Mhz hits. This one broke in the pole 00-01 campaign. Not powered.
- 4.  no daq-channl: DOMID 1007 OM610 intermittent electrical. Bad since deployment. Not powered.
- 5.  tbdaq-3 ch. 4: DOMID 1039 OM620 bad fiber connector at surface. Could get fixed by someone that knows about fixing fiber connectors, etc. Powered but no analog hits.
- 6.  no daq-channl: DOMID 1049 OM630 Kalle said it is not good. But Leuthold does not report as bad analog. Cable: Q6S. are we powering it? through a DOMCOM? Was good before 02.
- 7.  tbdaq-5 ch. 1: DOMID 1013 OM632 bad fiber in ice, also bad base, since deployemnt.
- 8.  tbdaq-5 ch. 7: DOMID 1034 OM638 used to have bad surface fiber but now it does not appear in Leuthold bad list (was it fixed?). Has a bad comm DAC at the DOM end or
- something that makes strange ticks up when captured on the surface. Can be used for time synchronization but it needs special treatment of the data.
- 9.  tbdaq-3 ch. 6: the surface clock counter does not reset but problem follows the clock channel/cable and not the DOMCOM. Could take a spare clock channel/cable to fix it. Has been requested.
- 10. tbdaq-2 ch. 0: now a "bad" spare, it was before DOMID 1030 but since it failed (clock issue?) it was left empty.
- 11. tbdaq-2 ch. 1: DOMID 1009 OM608 bad base (cannot set value of voltage), but usable PMT signals and digital data. This one broke in the pole 00-01 campaign.
- 12. tbdaq-5 ch. 4: DOMID 1029 OM635 cannot do timming becasue the DOM renders a flat comm ADC (can it do coarse 30nsec synchronization? without fits?)
- 13. tbdaq-3 ch. 7: DOMID 1032 OM622 comm DOM ADC waveforms are off-scale. They seem usable but need special treatment in analysis. This is a problem at the DOM end.
- 14. tbdaq-1 ch. 5: DOMID 1033 OM605 ATDW1 output is bad (all samples equal 682) ATWD0 is good.
- 15. tbdaq-4 ch. 6: DOMID 1022 OM629 ATWD1 data is bad (some samples 0-1 others just wrong, depending on the channel). ATWD0 is good.
- 16. tbdaq-1 ch. 0: DOMID 1004 OM599 ATWD0 is bad ATWD1 is good (high gain all 0-1 low gain saturates

## Fixes/upgrades after installation

- One burnt CPU replaced with the only spare.
- A couple of bad cables/channels being swapped
- A problem with the time reset operation fixed with remote loading of new firmware to clock unit

## Analog Output Status Summary

- 1 channel no fiber.
- 2 new failures, DOMs do not communicate: need further study.
- 2 bad bases (a third bad base is still usable).
- 1 intermittent electrical connector.

## Cable Delay Measurements Using RAP Method

- Repeated measurements from last year with new DAQ hardware. Analyzed by D. Cowen: consistent results.
- Improved surface noise (diff. Amplifier)
- Effect of Rb clock stability, compared to GPS’s is being studied.
- Main achievment is that now all channels (before just 4)  can deliver physics data.

## Time Synchronization 2001-TestBoards

## Time Synchronization 2002-DOMCOM

## Time Sync Waveforms (ADC)

## Time Sync Waveforms: Noise

## Down-going Muon Events

- A 15 min long run with all modules collecting LC hits
- Each DOM with a live-time of ~5-10%
- individual LC rate is 3-6 Hz
- Obtained 2 events with 6 DOMs hit in each.
- Clear down-going time structure confirming correctness of time stamping.

## 6-OM Downgoing Muonswith LC (no proc-sync)

## From here to Physics Ready Data...

- DAQ software: Upgrade well under way, will support full data retrieval from all eight channels on each DOMCOM PC. -JEJ-
- DAQ Trigger Software: Ready to be tested. -KH & DC-
- Event buffering at the DOM
- Firmware upgrades, in progress -GTP-
- DOM Software upgrades, coming soon -CMP-
- Fast communications (~50% Surface end implemented) -GTP-
- Feature extraction: work being done in Sweden.

## Other Future tasks and issues

- Calibrations: flashers, transit times, etc.
- Studies in connection with AMANDA/TWR/SPASE.
- Test Bed for IceCube modus operandi (similar but not identical to current scheme)