DEIMOS TEAM MEETING
Date (08/16/01)

Attendees: Heather Mietz, Dave Cowley, Vern Wallace, Chris Wright, Will Deich, Barry Alcott, Jack Osborne, Jeff Lewis, Carol Harper, Jerry Cabak, Bob Kibrick, Drew Phillips

1.  Next Meeting:

None made

2.  Today's Meeting Agenda:

1.      General Status

2.      Readiness Review Prep-what, etc. Coming from Keck: Hilton, Dave, Greg, Grant, one other person

Bob Kibrick

Software - Dean will start testing Galil code this afternoon.  Grating transport is working.  Galil code will take several days to debug.

We are supposed to have keyword control of:

Grating select and Clamp/Unclamp

Dean is going to work on this over the weekend and there is a chance that he will meet this requirement.  Currently, there is a problem with the software not knowing whether it is actually clamped or not.  Jack is working on the design and he will finish it this afternoon.  Barry can probably start to fix this problem tomorrow.  This is a high priority.

The grating select mechanism push button will not be done in time for the readiness review.  The slit mask push button will also not be done in time.  The filter wheel is the only system that will have a push button in time.

All other stages are under keyword control.  We will try to k-test over the weekend.

The FCS lights on Slider 2 are too bright.  Barry and Ted used LED light that seemed to work.  There was a spare bit for this.  The Copper/Argon lamps can be turned off for direct imaging – this is good.

Steve is on vacation, so there has been no new Lickserve work.

We have not received the new version of DS9 and can’t meet the readiness review requirement without this.  We can write to disk and read off of it, and that’s it right until we get this new version.

De has done more GUI work.  She is currently working on the TV stages.

Will Deich will work on DCS testing with the simulator later today.

Will is also working on Renishaw encoder  “jitters” from readhead #1. Bob would like to test with the clamp this afternoon.  Rotation repeatability testing is very solid.

Bob knows that the conceptual design for removable element data is due for the readiness review and will work on it.

FC aligned with grating is not going to be done before the readiness review.  It will probably be done by the end of next week.  Kinematics will need to be put on in order to stabilize.

The slitmasks have jammed upon insertion on three occasions.  The cause is unknown and the problem is intermittent.  A jig will need to be made so the masks are inserted properly.

Carol Harper

The TV Guide System has flaky A2S’s.  We are using Keck’s.  Range of motion is close to the end like ESI.  This is okay as it is designed this way.

Keywords are working and taking images. Flexure measurement made but sources are not determined.  The current results are 1 arcsec – y, 3 arcsec –x.  One arcsec on each axis is the goal, but this doesn’t need to be done for the readiness review.

Barry Alcott

Carol is done with the first 8 CCD cables.  She is showing Ted and Barry how to make them. 

An air pressure switch has been added in the cradle.

The coolant flow switch at input needs AC wire.

Nothing is going on with the hatch and cover limits.  This will be a big rush if it needs to be done last minute.

A system has been devised to interlock calibration with front hatch. Some components are built, and we need to add them to the Galil panel.

Nothing has been done on the motor for moving DEIMOS on the tracks.

Shortening cables once DEIMOS is stable will be a big job.

A plan has been devised for adding white LED for the FC.  This will take 6-8 hours to implement.

The filter wheel push button box has been mounted and connectorized.  This will be turned over to software tomorrow.

AC power cut off needs to be added on the electronics ring.

Cooling fans are ready to implement on the ring.

The PXL coolant interlock needs to be wired in.

Lantronics and hub needs to be mounted.

Indicators (via a switch) for “Observation in progress” and  “System disabled” have not been worked on.  We plan to abandon these indicators as they are seen as unclear.

The emergency stop which would connect us to CARA to stop the telescope and not just DEIMOS has not been worked on yet.

High priorities:

1.      Get pneumatic switch on lamp working

2.      End travel limit switch

Jerry Cabak

Kinematic mounts have been designed.  While new kinematics are being fabricated we plan to modify existing plates and ramps and use them. 

Ordered real plates from PDM and those will be in at the end of next week.

New kinematic mounts will be done today or tomorrow, but they can’t be used until the PDM order is in.

Jeff Lewis

When the roller deflection problem is fixed, alignment on the rails can be finished.  Chris wants fiber optic cables handled carefully.  Jeff wants to try moving DEIMOS tomorrow.

A path should be made for the Readiness Review folks to get around DEIMOS okay.

Dewar – LN2 can assembly and testing will happen today.  We won’t put the instrument in until it’s disassembled. 

Once it is jacked up, the sheet metal can be put back on.

Jack Osborne

Grating flex plate pin has been on the back burner, but will be bumped up per Bob’s issues.

There are clearance issues while on the rails; we might need to add “z”.

Chris Wright

Currently rewiring and updating boards to test FC CCDs.  Controller will be back together this afternoon.

Vern Wallace

There are installation difficulties.  Fixes to facilitate installation are being designed.

Hadn’t known slit mask insertion had failed.  Software wants to look at it.

We have 10 brand new masks. The k-tested masks should be taken out and testing should be done with the new ones this afternoon.

Drew is going to design the masks per Marc D.

Grating - PRM has been tested.  It works to clamp sliders in all positions.  Flexure tests are starting on this.

Alignment – collimator and imaging mirror – will require more work in a few weeks.

Drew Phillips

Optical data is being analyzed.  There is a mystery in the optical alignment area.  He has tried alignment with the laser. Optical model is showing 3/10 of a degree misalignment. Optical quality needs to be worked on.  Once the above mystery is solved, this will be easy.

Flexure - Initial results on flexure:

Collimator and tent mirror = 1/2 dozen pixels

grating = a few pixels

camera detector =  a few pixels. 

Dave wants actual numbers by the readiness review.

Heather Mietz

Updating site so that “current images” of DEIMOS can be accessed by system (not by date).  She is also printing out images for the binder here and putting them on the hard drive archive.  This will take a few more days to complete.

Dave Cowley

Pre-Ship will be the middle to end of September.

Readiness Review: 1st day – go over instrument; 2nd day – deliverables, commissioning. Dave wants everyone to look through PowerPoint handout for accuracy. Comments to Dave on PowerPoint are due by tomorrow morning. The final will be posted by tomorrow afternoon. On Tuesday, Hilton and Dave S. will be here to talk with Bob Kibrick and Dave Cowley. A presentation will be held on Wednesday or Thursday. De will probably be needed there for k testing information, and Drew for image quality.

Keck’s platform modifications are on track.  They are still planning for the September shut down and have a lot to do.

 

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Minutes written by Carisa Lopez, email: heather@ucolick.org