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AUSTRALIAN NATIONAL UNIVERSITY Monthly
Report 16 Created: 15 July 2001 Last modified: 17 July 2001 |
MONTHLY REPORT FOR JUNE 2001
Jan van Harmelen
Research
School of Astronomy and Astrophysics
Institute
of Advanced Studies
Australian
National University
Revision
History
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Revision No. |
Author & Date |
Approval & Date |
Description |
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Revision 1 |
Jan van Harmelen 14 July 2001 |
Peter McGregor 16 July 2001 |
Original document. |
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Contents
All effort this month is again concentrated on
design and fabrication. There is no progress on scientific issues to report.
This report on NIFS
activities covers the four-week period from 4 to 29 June 2001.
The search for
competent mechanical design and electronics technical staff continues. All
three electronic positions have been filled, with the appointees taking up
duties in August and September. An appointment for one of the mechanical
engineering position has been offered and negotiations are in progress. The
preferred applicant for the second vacant mechanical engineering position has
accepted another position. Another round of advertising may be required.
Vacuum testing of the
empty cryostat was successful.
The start of the first
cooldown, planned for 3 July, has been delayed because the cryocoolers and
their mounting bellows are now expected to arrive at the end of July. The
helium hoses and accessories have arrived from Gemini. Another problem was the
provision of cooling water for the helium compressors. Our original plan for
the resurrection of an air-conditioning cooling tower failed as no suitable
plant could be located. The back-up plan of connecting to the building water
supply failed due to lack of pressure. We are proceeding with the purchase of a
recirculating water chiller, available for immediate delivery ex Melbourne.
The design of
modifications to our test dewar has been completed and fabrication is progressing
well.
Design detailing and
the production of fabrication drawings for the spectrograph have been started
in early June. The detector mounting box design was completed and it is now
being fabricated. We expect to be able to catch up on this work when the new
mechanical engineer starts.
After the mirror array
blanks were damaged, new ones have been manufactured and sent to Germany.
Diamond machining of these blanks has been scheduled for mid August.
The printed circuit
boards for the sensor support boards and Phytron backplane have both gone out
for manufacture. Delivery of the bare boards is expected towards the end of
July. The mechanical assembly of the electronics crates for the control system
has been completed and wiring is in progress. The wiring of the cryocooler
drive crate has been completed. John Atkin, who, on a temporary appointment,
performed this assembly and wiring work over a 15 week period, is unfortunately
not able to stay with us any longer. Further progress will be slow until the
new electronics technicians start work.
The printed circuits
for the detector mounting board and the flex circuits for the cryostat internal
wiring are ready for manufacture. A CCD detector mounting board for one of
RSAA’s detector systems has been made with the same technology. We intend to
wait with the manufacture of the NIFS circuit boards till we have confirmed
that there are no problems with this CCD board.
The DHS has been
installed and tests have been run to confirm the performance of the DC to DHS
data communication. The observed data rates were rather variable. Fine-tuning
the DHS configuration seems to have overcome the problems. The CC software is
also progressing. Interaction is required between the Focal Plane Mask Wheel
and the Filter Wheel to safeguard the detector from saturation when changing
occulting disks in an observing scenario. The question whether this interaction
is best handled in the CC or in the OCS is not yet conclusively answered. We
suspect that a few lines of code at the OCS level could handle this, and
estimate that changing the CC software will take around 250 hours. It is not
necessary to implement this at a low level, as people operating the system at
the lowest levels should know what they are doing.
The revised schedule
submitted as part of the CDR documentation will be considered as the “current
schedule”. Progress is consistent with this schedule.
No tasks were
completed during the reporting period.
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Task WBS |
hrs |
Finish Date |
Title |
Deliverables |
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4.1.1
Cryostat and
OIWFS Duplication – Project Management
A continuing task. JvH: 21 hrs.
4.2.1
Cryostat and
OIWFS Duplication – Design and Supervision
A continuing task. CV and others: 64 hrs.
4.2.2 Cryostat and OIWFS
Duplication – Parts Fabrication
Workshop
effort 187 hrs this period.
4.2.4.2/4.2.4.3 Cryostat
and OIWFS Duplication – Assemble VJ/Pump and Vacuum Test 1
CV,
PC, DM, and others: 13 hrs.
4.3.1
Control System –
Design and Supervision
Purchasing and design. MID: 25 hrs.
4.3.2
Control System –
General Fabrication
Equipment mounting: JA: 148 hrs.
4.3.6
Control system -
Extra Design
MID: 68 hrs
4.3.7
Control system –
Mechanical Work
Workshop: 5 hrs.
5.1.1
Spectrograph
Construction – Project Management
A continuing task, JvH: 21.5 hrs
5.1.5
Spectrograph
Construction – PS Miscellaneous
PM: 12 hrs.
5.3.8
Spectrograph
Optical Fabrication – Pupil Mirror Array
Manufacture blanks, workshop: 43 hrs.
5.4.1
Produce
Fabrication Drawings – Disperser Turret
JH: 29 hrs.
5.4.4
Produce
Fabrication Drawings – Detector Mount
PC: 56 hrs.
5.4.10
Produce
Fabrication Drawings – Camera Mount
No progress.
5.7.4
Components
Controller s/w
MJ: 50 hrs.
5.7.5
Instrument
Sequencer s/w
MJ: 7.5 hrs.
5.8.6.1
Test Cryostat –
Design Mechanical Modifications
PC: 34 hrs.
5.8.6.2
Test Cryostat –
Manufacture Parts
Workshop effort 144 hrs.
5.8.7.4
Test Cryostat -
Detector Mount Board Design
MDD: 5 hrs
5.8.7.5
Test Cryostat -
Detector Mount Board PCB Layout
MDD: 18 hrs
5.8.7.6
Test Cryostat –
Flex Circuits Design
MDD: 5 hrs
5.8.7.7
Test Cryostat -
Flex Circuits PCB Layout
MDD: 12 hrs
No documents were issued during the reporting
period.
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Document ID |
Rev |
Date |
Title |
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The current schedule
is the schedule included in the CDR Documentation.
The total work on NIFS
during the reporting period is 1007 hours, bringing the total for the project
to 15,751 hrs, which represents approximately 50.4% of the total number of
hours in the current project plan.
Listed below are the milestones defined in the NIFS contract.
Milestone 3, AURA approval
of Final OCDD and FPRD, has been postponed till these documents will be
submitted after changes discussed at the CDR can be implemented.
Milestone 4, AURA approval of Detailed Design Documentation after CDR has
been postponed till the Acceptance Test Plan, the Verification and
Commissioning Plan and the Spares List will be submitted after changes
discussed at the CDR can be implemented.
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Event |
Date |
Status |
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(1)Contract fully signed |
August 2000 |
Completed |
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(2) Placement of order for vacuum
jacket forging |
August 2000 |
Completed |
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(3) AURA approval of Final FPRD
and OCDD |
5 December 2000 |
To be submitted with CDR
documentation |
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(4) AURA approval of Detailed
Design Documentation after CDR |
January 2001 |
CDR 19 April 2001 |
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(5) Start of first Cryostat and
OIWFS cooldown |
14 May 2001 |
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(6) Completion of Cryostat and
OIWFS Duplication (As task is described in Conceptual Design Documentation) |
4 October 2001 |
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(7) Completion of Spectrograph
Construction (As task is described in Conceptual Design Documentation) |
22 March 2002 |
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(8) Authorization to ship
instrument given by AURA |
19 July 2002 |
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(9) Completion of all Work and
Final Acceptance given by AURA |
1 October 2002 |
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The exchange rate used
is the rate applicable to a particular transaction, or the rate on the last day
of the reporting period. On 29 June 2001 the rate was 0.508.
No income was gained
during the reporting period.
The NIFS account was
charged for 995 hrs of work for the reporting period. This is the total number
of hours (1007) minus the hours for the Project Scientist (12). The total
charge is US$34,825 (A$68,553)
The following table
lists all expenditure incurred and all new commitments made during the
reporting period.

Note: “Type” indicates: e – expenditure, c - commitment

Measures are in place
to minimise delays resulting from the unavailability of as-built and
performance information on NIRI and its control software.
The next minor
milestone on the current schedule is the start of cooldown cycle 0 (cryostat
with Cold Work Surface and radiation shields) planned for 3 July has been delayed.
A new date will be set when the cryocoolers and their mounting bellows arrive.
At this stage we are confident that this delay will have minimal impact on the
first OIWFS cooldown scheduled for October, if the OIWFS components and
detector system arrive in time.
There are no financial
problems.
The following Action Items are outstanding.
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No. |
Action |
Who |
Status |
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4 |
Negotiate delivery schedule for As Built NIRI drawings with IfA |
RAN |
Mechanical drawings received. |
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9 |
Send 7 cryo stepper motors to ANU |
RAN |
1 received (no further action required till
later) |
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10 |
Provide details on vacuum grease in use at Gemini |
RAN |
Closed Information provided |
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11 |
Provide details of NIRI nitrogen venting arrangement |
RAN |
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