IMACS progress report no. 12

B. Bigelow						7 April 1999

Mechanics Objectives for March:

Status:

Done	A.  Complete prelim. guider mechanical layout (TB)
Done	B.  Complete prelim. filter-changer layout (TB)
Done	C.  Complete prelim. FEA of instrument structure (BB)
Done	D.  Complete prelim. MD3 model for IMACS (TB/BB)
Done	E.  Produce prelim. motion control schematics (BB)
Done	F.  Complete preparations for PDR (BB/TB)

Mechanics Objectives for April:

	A.  Revise budget and schedule based on PDR recommendations (BB)
	B.  Revise preliminary structure design, structure interfaces (BB)
	C.  Revisit slit fabrication research and development (BB)
	D.  Start final design of Disperser Server System (TB)
	E.  Revise dewar specifications (BB)
	F.  Continue optics cells design (TB/Schier)
	G.  Establish schedule for electronics design and fabrication
	H.  Establish schedule for instrument software tasks

I)	Project scope, budget, and schedule

The IMACS preliminary design review was held on 3 April 1999.
Comments from the reviewers following the meeting were generally very
positive.  A report from the reviewers is expected within the next
couple of weeks.  Changes regarding the project schedule and budget
were suggested at the PDR, and will result in revisions to both.

Detailed progress reports by area will resume next month.

II)	Mechanics

Excepting the instrument hatch and calibration system, preliminary
designs for all of the instrument subsystems were completed for the
PDR.  Pending the PDR report, we are moving ahead with the final
designs for the optics cells (Schier), the dewar (Luppino), the
Disperser Server (Bond), and the Mask Server (Bigelow).

III)	Electronics

Schematics and block diagrams for the instrument motion control
electronics were completed for PDR.  A plan will be produced this
month for the design and fabrication of the motion control
electronics, including staffing.

IV)	Software

An overview of the instrument control system, including schematics,
command structures, system diagnostics, and data handling, was
completed for the PDR.  Pending PDR committee recommendations, a plan
will be produced this month for producing the instrument control
software.

V)	Optics

A status report on the current state of optics fabrication was presented
at the PDR.  

VI)     Detector Systems

The guide camera prototype is complete, and is undergoing software
integration and testing.  All of the circuit boards have been
designed, built and tested.  The mechanical housing has been machined,
and assembled.  The complete system (except for the detector) has been
functionally tested, including generating clock waveforms, changing
DAC voltages, reading the ADC, and sending data back and forth to the
PCI interface.  The DSP software, Linux device driver, and interface
library software are written, but not completely tested.  The first
camera should be producing images by the end of April.

Development of the science array controller is ongoing.  The array
controller is currently scheduled for completion in April 2000.