ONLY AUTHORIZED PERSONNEL ARE ALLOWED TO INSTALL THE POLARIMETER

Installing the polarimeter

1. Login to honolii as user lriseng.
2. Start the script to install the polarimeter by selecting Engineering > Polarimeter > Install polarimeter. When the following query appears:

   Should I open the trapdoor, insert direct mask, and power off
   the red polarimeter encoder so that you can install
   the module? (y/n) [y]: 

   press Enter to continue. The script will prepare the instrument for insertion of the polarimeter module, and tell you when to proceed with installation.
3. Rotate LRIS to the fill position (if it is not already there) by following these steps:
   • Verify that power to the AAA is on at the MCP.
   • In the AAA at Panel A2:
     • Switch CASS to ENABLE.
     • Switch MODE to LOCAL.
     • Switch DRIVE POWER to ON.
   • Hold down CASS CW switch to rotate to desired position.
   • Switch DRIVE POWER to OFF
4. Remove LRIS to the Cassegrain platform following the module servicing procedure.
5. Using a 3/16 ball driver, reach through the trap door and loosen, but do not remove, the four allen screws from the front of LRIS, (two screws on top and two on bottom) that reference the polarimeter. Alert: The screws are not captive!
6. Open the outer and inner side access doors on the left side of LRIS, inner hatch door will require a 7/64 ball driver.
7. Remove the polarimeter from the case and install it through the side access door using the two handles being cautious not to touch any of the optical components. The filter wheel faces towards the secondary. Be careful as the field lens is directly behind the polarimeter.
8. Tighten the four screws that define the polarimeter baseplate against the LRIS frame in front of the field lens. You may have to rotate the filter wheel to get to the top right screw. When finished, make sure that the filter wheel is in a detent (indexed) position.
9. Connect the four polarimeter cables.
10. Close the outer side door securely.
11. Now return to the honolii computer and press Enter in the window running the polarimeter install script to continue.
12. When given the query

    Should I power on the polarimeter module? (y/n) [y]:

    press Enter to restore power.
13. The script will now do the following:
    • Update the image headers to include polarimeter keywords.
    • Restart the low-level software which writes images headers so that the updated header file is re-read.
    • Check operation of the waveplate stage.
    • Check operation of the calibration wheel.
14. Once the stages check out, the script is ready to take some test images. To bring up the LRIS software, select from the desktop menu Start Up ALL LRIS Control listed under desktop Menu. If the software is already running, you must restart before continuing by selecting the Re-start ALL LRIS control option from the desktop menu. Once you have done this, return your cursor to the window running the script and press Enter to continue.
15. The script will configure LRIS for spectroscopy and take an image with the RED side of LRIS. Check the image to verify that it looks appropriate (see sample image below). Note that there should be two spectra running left to right on the CCD; these are the two polarization senses of the light. If the image looks okay, proceed.
16. When done, the script will print:

    ------------------------------------------------------------------------
                                      SCRIPT DONE                               
    ------------------------------------------------------------------------

    Press Enter to close the window.

If there are no other LRIS configuration changes...

1. Install LRIS in the telescope following module servicing procedures.
2. Select Engineering > Checkout LRIS in desktop menu. See the Checkout Procedure .
3. Press y to start the checkout script.
4. Note if the script has any problems executing.
5. Select logout from the desktop menu.
6. Update the summit activities instrument schedule on the web.

Sample Image

Sample RED

Sample BLUE