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MagE Procedures

Mage Maintenance Procedures

 

When MagE Is Not Being Used

When MagE is not the active instrument for a period of time, the following procedures should be carried out:

1) The MagE GUI may be shut down when not being used.  Click on File > Exit to shut down the GUI.

2) Leave the instrument powered.  The instrument electronics box should remain powered on at all times.  If UPC power is lost at the telescope, please follow instructions in the "If MagE Loses Power" section below.

3) Monitor the instrument.  Please record the dewar and vacuum status in the daily report form every 3 days.  Please log the 3 temperatures (CCD, Cryo, and MagE) and 2 vacuum levels (VacSensor and IonPump).  These values may be found in the MagE GUI under Options > DewarStatus. 

 

If MagE Loses Power

 

  • To Remove MagE from the Telescope

The instrument should only rarely be removed from the telescope. If it is necessary to remove MagE from the telescope (e.g., to service the guider), the following procedures should be followed:

1) Shut down the control GUI on the observer's computer.  Click on File > Exit to shut down the GUI. 

2) Turn off power to the instrument electronics box.  The large grey box mounted to the side of MagE is the electronics box.  Turn off the power by flipping the silver locking switch (with large ON/OFF label) to off. 

3) Disconnect all cabling to the instrument.  All cabling to the instrument runs through the cable wrap.  Cables that must be disconnected are listed below:

a) power cable to the electronics box.  This cable should be unplugged at the orange extension cord coming from the cable wrap. 

b) 48-volt power cables for the slit viewing and science CCD cameras.  These two cables should be disconnected at the patch panel on the base of the instrument structure.  The short power cables should remain with the instrument, plugged into the slit viewing and science CCD cameras. 

c) ethernet line to the electronics box.  The ethernet line should be completely removed from the instrument. 

d) signal cable to the slit viewing CCD camera.  The signal cable should be completely removed from the instrument. 

e) coolant lines to the slit viewing guider camera.  These two lines (supply and return) should be removed at the patch panel.  The remaining coolant lines that run from the patch panel to the camera should remain on the instrument. 

f) optical fiber to the science CCD saddlebag.  The fiber should be carefully removed from the instrument and tied to the telescope.  

g) cryocooler lines to the science camera.  The two cryocooler lines (supply and return) are connected through the patch panel on the base of the instrument.  These should be disconnected at the patch panel; the short lines running from the patch panel to the science CCD should remain connected. 

4) Remove instrument from mounting ring.  All of the cables should now be disconnected between the cable wrap and the instrument.   Lift instrument using lifting fixture on crane attached to the trunions on either side of the instrument.

 

  • To Put MagE on the Telescope

To put MagE back on the telescope once it has been removed follow these procedures:

1) Lift MagE using the lifting fixture attached to the trunions on either side of MagE.  Bolt MagE on the FP2/Aux2 mounting flange.  The rotator should be set to +15 degrees to put MagE at its nominal zero position. 

2) Attach all cables coming from the cable wrap as described below:

a) cryocooler lines to the science camera.  The two cryocooler lines (supply and return) are connected through the patch panel on the base of the instrument. 

b) coolant lines to the slit viewing guider camera.  The two coolant lines (supply and return) should be attached to the quick connect fixtures at the patch panel.  Connect the supply and return to the appropriate fixture on the patch panel. 

c) signal cable to the slit viewing CCD camera.  The signal cable is plugged directly from the cable wrap into the slit viewing camera. 

d) power cable to the electronics box.  The electonics box power cable (black) should be plugged into the orange extension cord coming from the cable wrap. 

e) 48-volt power cables for the slit viewing and science CCD cameras.  These two cables should be plugged into the patch panel on the base of the instrument structure.  Plug the lines into the appropriate connector on the patch panel--both patch panel and cables should be labeled. 

f) ethernet line to the electronics box.  The ethernet line should be plugged directly from the cable wrap into the instrument electronics box. 

g) optical fiber to the science CCD saddlebag.  The fiber should be carefully attached directly from the cable wrap to the end of the CCD saddlebag, and carefully tied into place with cable ties.  

3) start the MagE GUI.  The MagE GUI is launched in any xterm window on the astronomer's computer by typing the command "mage" in a terminal window. An option exists to control the font size (as in "mage -h 14"). Complete details are found in the MagE manual (link exists from the Magellan Instruments web page).

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