Icetop Engineering DOM Shipment

Status 11/04/03

The first shipment of ICETOP DOMs occurred on 10/31/03. The DOMs should be inspected for possible broken pressure seals when they arrive at the pole.

One DOM, XE3P0014 ("Bubble") was shipped at atmospheric pressure. It is suspected that one of the penetrators on Bubble was leaking and they should be tightened - some resealing material was provided in the shipment.

Note, DOM XE3P0016 ("Frankendom") was listed in the travel documents as being at atmosphere when it was shipped. This problem was solved and the DOM was actually shipped at the correct pressure.

Minor additions to this document occured on 11/07/03

INDEX:
Identification
Programming
Pressure Test
Cold Boot Test
High Voltage Tests
JTAG Test
Loopback Local Coincidence Test
ATWD Noise Test
Peak To Valley Measurements
Dom Naming Conventions


Identification

DOM id

Name

Mainboard

Sphere

HW_ID

HV_ID

XE3P0014 Bubble V2_19 (rev 2) 68368 0001-3C62-86C1 8062-08F9-9000-00CE
XE3P0015 Chip V2_11 (rev 2) 63374 0001-3C62-7DAC 8024-58F9-9000-00C6
XE3P0016 Frankendom V2_14 (rev 2A) 63378 0001-3C62-7F13 80AF-DF79-9000-0010
XE3P0010 Scarface V2_17 (rev 2) 63351 0001-3C62-A821 0 (id fails to read)
The Rev 2A mainboards have a modified clamping amplifier and ATWD channel 1 has been cut.

Programming

All DOMs were programmed on 10/20/03 to 10/22/03. The firmware revision coresponded to build 259. It was obtained from Arthur Jones on 10/20/03 as a last minute fix for DOM communication problems. The programming had to be done twice for each DOM since the updated firmware slowed down the memory speed to 20 MHz

Pressure Test

The DOMs were sealed from 10/27/03 thru 10/31/03.

DOM id

Name

Mainboard

Sealing Pressure (kPa)

Lowest Pressure During Sealing (kPa)

Comments

XE3P0014 Bubble V2_19 50 43 seal broken when shipped, penetrators suspected
XE3P0015 Chip V2_11 50 38 seal good when shipped
XE3P0016 Frankendom V2_14 51 23 seal good when shipped (contrary to travel documents), also this DOM initially had the pressure sensor chip on backwards
XE3P0010 Scarface V2_17 50 23 seal good when shipped

Cold Boot Test

All DOMs cold boot. With the previous firmware DOM Scarface would not cold boot at -45 degrees.

HV Ramp Test

All DOMs passed the HV Ramp Test. The total voltage discrepancy at the end of the test ranged from 2.5 Volts to 10.5 Volts.

HV Stability Test

All DOMs passed the HV Stability Test. The total voltage discrepancy at the end of the test ranged from 1.0 Volts to 7.6 Volts.

JTAG Test

All DOMs passed the JTAG test.

Loopback Local Coincidence Test

Bubble, Frankedom, and Scarface all passed the loopback local coincidence test; Chip failed. For Chip all pulse directions passed except for downgoing negative pulses which were only received about 20% of the time.

ATWD Noise Test

The maximum deviation from the baseline level...

DOM id

Name

ATWD-A 0

ATWD-A 1

ATWD-A 2

ATWD-B 0

ATWD-B 1

ATWD-B 2

XE3P0014 Bubble 12.46 4.08 2.25 12.46 4.17 2.25
XE3P0015 Chip 14.17 5.92 2.33 13.46 6.12 2.50
XE3P0016 Frankendom 15.67 2.04 2.42 15.62 2.25 2.04
XE3P0010 Scarface 9.54 4.42 2.04 10.17 5.21 4.12

Peak to Valley measurements 10/31/03

DOM id

Name

Mainboard

Sphere

Raw Data

click to enlarge

Smoothed Data

click to enlarge

Target Voltage

XE3P0014 Bubble V2_19 68368 1475
XE3P0015 Chip V2_11 63374 1425
XE3P0016 Frankendom V2_14 63378 1375
XE3P0010 Scarface V2_17 63351 1275

Naming Conventions

DOM "names" are all individualized and were based either on a particular DOM's characteristics or its experiences.

DOM id

Name

Why?

XE3P0014 Bubble used in a bubblewrap insulation test
XE3P0015 Chip during nitrogen filling dome landed hard on bottom hemisphere which resulted in a sizeable chip
XE3P0016 Frankendom produced scary error messages after its mainboard had been resurrected after initially being fried during firmware reprogramming
XE3P0010 Scarface has a large scar in the glass across top of dome



Mark Krasberg
4205 Camberlain Hall
1150 University Avenue
Madison, WI, 53706
tel: (608) 265-6669
krasberg@amanda.wisc.edu